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Info Database Last Updated 08.04.2024 (Entity News entries: 130)
Type/Category of Info:
Abstracts of Official ReportsInfo Source From:
The Mining and Scientific Press. Volume: 120 [CXX], Issue No. 14Info Publication Date:
April 3, 1920Info found on page:
511Info Title:
Portland Gold Mining Co. ReportTHE PORTLAND GOLD MINING CO.
Report for the year ending December 31, 1919.
Property: Portland and Independence mines and the Independence mill in the Cripple Creek district, and the Portland Mill at Colorado Springs.
Operating Officials: George M. Taylor, general manager; Fred Jones, mining engineer; Thomas B. Crowe and J. M. Tippett, metallurgical engineers.
Financial Statement: Gross value of ore mined and shipped, $1,272,720; proceeds from Independence mill, $513,877; miscellaneous revenue, $6293; cost of mining and milling, $1,502,600; net profit from operation, $230,290
Dividends: $240,000 during 1919; total to date, $11,497,080.
Development: The mines have been opened a depth of 2300 ft., where a station and pumping equipment has been completed. Good ore is being blocked out on the 20th and 21st levels.
Production: 373,192 tons of ore was produced during 1919.
Report for the year ending December 31, 1919.Property: Portland and Independence mines and the Independence mill in the Cripple Creek district, and the Portland Mill at Colorado Springs.Operating Officials: George M. Taylor, general manager; Fred Jones, mining engineer; Thomas B. Crowe and J. M. Tippett, metallurgical engineers.Financial Statement: Gross value of ore mined and shipped, $1,272,720; proceeds from Independence mill, $513,877; miscellaneous revenue, $6293; cost of mining and milling, $1,502,600; net profit from operation, $230,290Dividends: $240,000 during 1919; total to date, $11,497,080.Development: The mines have been opened a depth of 2300 ft., where a station and pumping equipment has been completed. Good ore is being blocked out on the 20th and 21st levels.Production: 373,192 tons of ore was produced during 1919.Above Info was Last Updated on 30.10.2020 (11:04:30)
Above Info was First Seen 24.02.2020
Type/Category of Info:
General Mining NewsInfo Source From:
The Mining and Scientific Press. Volume: 120 [CXX], Issue No. 10Info Publication Date:
March 6, 1920Info found on page:
349Info Title:
Portland Gold Mining Co. Junks Two Mills Its announced that the Portland Gold Mining Co. has abandoned two of its large mills and that these plants have been sold to junk-dealers, which lends to give one a pessimistic idea regarding the future of the Cripple Creek district.
The 600-ton mill at the mine was abandoned at the time the 1500-ton Independence Mill was completed about two years ago.
The 800-ton plant at Colorado City has also been idle for some time.
Before the abandonment of these mills much of their machinery was placed in the new mill at Victor.
The 600-ton mill at the mine was abandoned at the time the 1500-ton Independence Mill was completed about two years ago.The 800-ton plant at Colorado City has also been idle for some time. Before the abandonment of these mills much of their machinery was placed in the new mill at Victor.
Notes/Text been Edited:
Abstracted and slightly rewritten from source text.Above Info was Last Updated on 30.10.2020 (11:04:30)
Above Info was First Seen 24.02.2020
Type/Category of Info:
General Mining NewsInfo Source From:
The Mining and Scientific Press. Volume: 118 [CXVIII], Issue No. 25Info Publication Date:
June 21, 1919Info found on page:
859Info Title:
Portland Mill Schedule Treatment Charges The Portland company has announced a new schedule of treatment charges on low-grade mine and dump ores, as follows:
Up to $3 value, $2.00 per ton
$3.50 at $2.25 per ton
$4 at $2.50 per ton
$4.50 at $2.65 per ton
$5 at $2.75 per ton.
Up to $3 value, $2.00 per ton $3.50 at $2.25 per ton $4 at $2.50 per ton $4.50 at $2.65 per ton $5 at $2.75 per ton.Above Info was Last Updated on 30.10.2020 (11:04:30)
Above Info was First Seen 07.03.2020
Type/Category of Info:
Abstracts of Official ReportsInfo Source From:
The Mining and Scientific Press. Volume: 118 [CXVIII], Issue No. 11Info Publication Date:
March 15, 1919Info found on page:
374Info Title:
Portland Gold Mining Company Annual Report 1918 AbstractsProperty: mines and mills at Cripple Creek, Colorado.
Operating Officials:
G. M. Taylor, general manager
Fred Jones, superintendent at the mine
T. B. Crowe, superintendent at the mill
Luther Lennox, assistant
and Merrill Metallurgical Co., consulting metallurgists.
Financial Statement: the net profit in 1918 was $196,596. The balance from 1917 was $278,383, and that carried to 1919 was $127,622.
Current assets total $395,966, and liabilities $14,052.
Dividends: the total last year was $300,000, making $11,267,080 to date.
Development:
there was accomplished 8071 ft., making 63 miles in the Portland mine.
The Independence mine has 17 miles of openings.
The branch tunnel from the Roosevelt drainage-tunnel to No. 2 shaft of the Portland, at a depth of 2131 ft., was connected during the year.
At the end of 1918 the main shaft was sunk to No. 21, or the drainage-level.
Development of No. 1 vein will soon be under way.
The Lee No. 5 orebody was cut by the tunnel cross-cut, and driving is opening high-grade ore.
Generally the outlook is promising.
Production:
the Colorado Springs mill was closed on March 31, and the Victor mill on July 30, leaving the Independence in operation.
The extraction at the last named was good, but the profit was small.
Almost without exception, every improvement devised to reduce costs was immediately offset by some increase in cost of labor or supply entering into the extraction of gold.
The output was 53,887 tons (Colorado Springs) valued at $1,120,851, and 522,756 tons (Victor mills) worth $1,071,925.
The output to date is 3,949,248 tons, worth $48,773,378 gross.
Experiments were made on the tailing at Colorado Springs in an endeavor to devise a process for extracting potash therefrom. This material contains 7% K2O, and there is about 2,000,000 tons of it awaiting treatment.
Operating Officials:G. M. Taylor, general managerFred Jones, superintendent at the mineT. B. Crowe, superintendent at the millLuther Lennox, assistantand Merrill Metallurgical Co., consulting metallurgists.Financial Statement: the net profit in 1918 was $196,596. The balance from 1917 was $278,383, and that carried to 1919 was $127,622.Current assets total $395,966, and liabilities $14,052.Dividends: the total last year was $300,000, making $11,267,080 to date.Development:there was accomplished 8071 ft., making 63 miles in the Portland mine.The Independence mine has 17 miles of openings.The branch tunnel from the Roosevelt drainage-tunnel to No. 2 shaft of the Portland, at a depth of 2131 ft., was connected during the year.At the end of 1918 the main shaft was sunk to No. 21, or the drainage-level.Development of No. 1 vein will soon be under way.The Lee No. 5 orebody was cut by the tunnel cross-cut, and driving is opening high-grade ore.Generally the outlook is promising.Production:the Colorado Springs mill was closed on March 31, and the Victor mill on July 30, leaving the Independence in operation.The extraction at the last named was good, but the profit was small.Almost without exception, every improvement devised to reduce costs was immediately offset by some increase in cost of labor or supply entering into the extraction of gold.The output was 53,887 tons (Colorado Springs) valued at $1,120,851, and 522,756 tons (Victor mills) worth $1,071,925.The output to date is 3,949,248 tons, worth $48,773,378 gross.Experiments were made on the tailing at Colorado Springs in an endeavor to devise a process for extracting potash therefrom. This material contains 7% K2O, and there is about 2,000,000 tons of it awaiting treatment.Above Info was Last Updated on 30.10.2020 (11:04:30)
Above Info was First Seen 05.03.2020
Type/Category of Info:
ArticleInfo Source From:
Metallurgical and Chemical Engineering. Volume: 18 [XVIII], Issue No. 11Info Publication Date:
June 1, 1918Info found on page:
567Info Title:
Portland Co. Closes Colorado Springs PlantPortland Company Closes Colorado Springs Plant
The exhaustion of bonanza mines is often referred to as the reason why a large expansion in metallic production does not follow war prices. Unfortunately gold production is hindered rather than helped by high prices, but the continuing exhaustion of known deposits is as patent as those of other metals.
Witness the closing of the Colorado Springs plant of the Portland Gold Mining Company, of which a final clean-up was made in April. This mill was built to treat high-grade ores only, and is useless now that the high-grade ores of the Cripple Creek District are being exhausted.
In its sixteen years of life it has extracted gold at an average rate of over two million dollars per year, but during the past years there has been a constant decrease in the tonnage of high-grade ore shipped, owing to a lessened production of the district, this doubtless accentuated by the shortage of efficient labor and the high cost of fuel, powder, timber, and other necessary supplies.
The Portland Company foresaw the probable shutdown of the Colorado Springs plant and provided room for the treatment of their own and custom high-grade ore when constructing their new Independence Mill, expecting to transfer the necessary machinery and workmen from the older plant.
The Independence Mill, by the way, was primarily designed to treat monthly about 42,000 tons of low-grade ore from dumps and old workings, the latter estimated to amount to about three million tons. Eventually all milling operations of the Portland Company will doubtless be done at this new mill, which is modern in every respect, since the Victor Mill, built eight years ago as an experimental plant to handle ores too low in grade to bear shipment, was constructed at the mine on an unfavorable location.
It has earned net profits more than double its original cost, however, while the net earnings of the Colorado Springs plant amount to several times the original cost of that plant.
The exhaustion of bonanza mines is often referred to as the reason why a large expansion in metallic production does not follow war prices. Unfortunately gold production is hindered rather than helped by high prices, but the continuing exhaustion of known deposits is as patent as those of other metals. Witness the closing of the Colorado Springs plant of the Portland Gold Mining Company, of which a final clean-up was made in April. This mill was built to treat high-grade ores only, and is useless now that the high-grade ores of the Cripple Creek District are being exhausted. In its sixteen years of life it has extracted gold at an average rate of over two million dollars per year, but during the past years there has been a constant decrease in the tonnage of high-grade ore shipped, owing to a lessened production of the district, this doubtless accentuated by the shortage of efficient labor and the high cost of fuel, powder, timber, and other necessary supplies. The Portland Company foresaw the probable shutdown of the Colorado Springs plant and provided room for the treatment of their own and custom high-grade ore when constructing their new Independence Mill, expecting to transfer the necessary machinery and workmen from the older plant. The Independence Mill, by the way, was primarily designed to treat monthly about 42,000 tons of low-grade ore from dumps and old workings, the latter estimated to amount to about three million tons. Eventually all milling operations of the Portland Company will doubtless be done at this new mill, which is modern in every respect, since the Victor Mill, built eight years ago as an experimental plant to handle ores too low in grade to bear shipment, was constructed at the mine on an unfavorable location. It has earned net profits more than double its original cost, however, while the net earnings of the Colorado Springs plant amount to several times the original cost of that plant.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 567
- Hathi Trust Digital Library: ⊞ Metallurgical and Chemical Engineering 1918 (Volume 18)
Above Info was Last Updated on 10.02.2023 (11:19:25)
Above Info was First Seen 10.02.2023
Type/Category of Info:
General Mining NewsInfo Source From:
The Mining and Scientific Press. Volume: 107 [CVII], Issue No. 23Info Publication Date:
December 6, 1913Info found on page:
907Info Title:
Portland Mill, Colorado City Production; November 1913 The Estimated production of the following district mill during November is as follows:
Where treated
Tons
Av. value
Gross value
Portland, Colorado City
9,500
$ 22.00
$ 209,000
Where treatedTonsAv. valueGross valuePortland, Colorado City9,500$ 22.00$ 209,000
Notes/Text been Edited:
Abstracted and somewhat rewritten slightlyAbove Info was Last Updated on 30.10.2020 (11:04:30)
Above Info was First Seen 26.01.2020
Type/Category of Info:
General Mining NewsInfo Source From:
The Mining and Scientific Press. Volume: 107 [CVII], Issue No. 15Info Publication Date:
October 11, 1913Info found on page:
590Info Title:
Portland Mill, Colorado City Production; September 1913 The reported production of the following district mill during September was as follows:
Plants
Tonnage
Av. val.
Gross val.
Portland, Colorado City
10,500
22.00
$ 231,000
PlantsTonnageAv. val.Gross val.Portland, Colorado City10,50022.00$ 231,000Notes/Text been Edited:
Abstracted and somewhat rewritten slightlyAbove Info was Last Updated on 30.10.2020 (11:04:30)
Above Info was First Seen 17.11.2019
Type/Category of Info:
General Mining NewsInfo Source From:
The Mining and Scientific Press. Volume: 107 [CVII], Issue No. 10Info Publication Date:
September 6, 1913Info found on page:
392Info Title:
Portland Mill, Colorado City Production; August 1913 According to local statistics, the following Cripple Creek mill August output was:
Plants
Ore treated tons
Av. val. per ton
Gross val.
Portland (Colorado City)
10,000
$ 22.00
$ 220,000
PlantsOre treated tonsAv. val. per tonGross val.Portland (Colorado City)10,000$ 22.00$ 220,000Notes/Text been Edited:
Abstracted and somewhat rewritten slightlyAbove Info was Last Updated on 30.10.2020 (11:04:30)
Above Info was First Seen 11.11.2019
Type/Category of Info:
General Mining NewsInfo Source From:
The Mining and Scientific Press. Volume: 107 [CVII], Issue No. 6Info Publication Date:
August 9, 1913Info found on page:
241Info Title:
Portland Mill, Colorado City Production; July 1913 According to local statistics, the following Cripple Creek mill July output was:
Plant
Tons
Av. val.
Gross value.
Portland (Colorado City)
9,665
22.00
212,630
PlantTonsAv. val.Gross value.Portland (Colorado City)9,66522.00212,630Notes/Text been Edited:
Abstracted and somewhat rewritten slightlyAbove Info was Last Updated on 30.10.2020 (11:04:30)
Above Info was First Seen 23.10.2019
Type/Category of Info:
General Mining NewsInfo Source From:
The Mining and Scientific Press. Volume: 107 [CVII], Issue No. 4Info Publication Date:
July 26, 1913Info found on page:
162Info Title:
Portland Mill Expands Its Machinery At the Portland mill, another Chilean mill is being installed driven by a motor, and the transformer station is being enlarged.
Above Info was Last Updated on 30.10.2020 (11:04:30)
Above Info was First Seen 23.10.2019
Type/Category of Info:
General Mining NewsInfo Source From:
The Mining and Scientific Press. Volume: 107 [CVII], Issue No. 2Info Publication Date:
July 12, 1913Info found on page:
72Info Title:
Portland Mill, Colorado City Production; June 1913 According to local statistics, the following Cripple Creek mill gold production was:
Name
Tons.
Av. val.
Gross value.
Portland, Colorado City
9,950
22.00
218,900
NameTons.Av. val.Gross value.Portland, Colorado City9,95022.00218,900
Notes/Text been Edited:
Abstracted and somewhat rewritten slightlyAbove Info was Last Updated on 30.10.2020 (11:04:30)
Above Info was First Seen 21.10.2019
Type/Category of Info:
ArticleInfo Source From:
Metallurgical and Chemical Engineering. Volume: 11 [XI], Issue No. 3Info Publication Date:
March 1913Info found on page:
123Info Title:
Portland Mill Runs at Full Capacity Using Cyanide The nineteenth annual report of the Portland Gold Mining Company, Cripple Creek district, Colorado, was issued on February 3, and shows the company to be in excellent condition, with greatly improved metallurgical facilities.
The Colorado Springs mill has been reconstructed into an up-to-date cyanide mill, and has been operating at its full capacity of 400 tons per day since November 15, 1912.
The Colorado Springs mill has been reconstructed into an up-to-date cyanide mill, and has been operating at its full capacity of 400 tons per day since November 15, 1912.Notes/Text been Edited:
Abstracted from larger textInternet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 123
- Hathi Trust Digital Library: ⊞ Metallurgical and Chemical Engineering 1913 (Volume 11)
Above Info was Last Updated on 08.02.2023 (18:38:20)
Above Info was First Seen 30.05.2010
Type/Category of Info:
PersonalsInfo Source From:
Mining Science. Volume: 66 [LXVI], Issue No. 1706Info Publication Date:
October 3, 1912Info found on page:
220Info Title:
Mr. F. H. Ricker Recently Completed Reconstruction at Portland Mill F. H. Ricker of the Merrill Metallurgical Co. of San Francisco, Cal., has just recently completed the reconstruction of the Colorado City mill of the Portland Gold Mining Co., changing the same from a chlorination to a cyanide reduction plant.
Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 220
- Hathi Trust Digital Library: ⊞ Mining Science; Volume 66; July to December 1912
Above Info was Last Updated on 08.07.2023 (08:41:03)
Above Info was First Seen 08.07.2023
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Science. Volume: 65 [LXV], Issue No. 1690Info Publication Date:
June 13, 1912Info found on page:
xxxvInfo Title:
Portlands New Converted Cyanide Mill The Portland mill at Colorado Springs is now a complete cyanide plant. It has a capacity of 11,000 tons a month.
Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ xxxv (ad35)
- Hathi Trust Digital Library: ⊞ Mining Science; Volume 65; January to June 1912
Above Info was Last Updated on 01.07.2023 (19:51:27)
Above Info was First Seen 15.07.2010
Type/Category of Info:
ArticleInfo Source From:
Metallurgical and Chemical Engineering. Volume: 10 [X], Issue No. 3Info Publication Date:
March 1912Info found on page:
127Info Title:
Portland Mill Happenings At the Colorado Springs mill of the Portland Gold Mining Company, the old equipment for chlorination is being abandoned, and the mill is being converted into a modern cyanide plant. The preparation of the ore, including roasting, will be retained as before.
It will then be ground in tube mills in cyanide solution and filtered in two 200-ton Merrill presses similar to those in use at the Homestake mine and other modern plants where filter pressing is adapted to the ore. Zinc dust precipitation also will be installed, making the plant conform to the most approved ideas in cyanidation of roasted ores.
It will then be ground in tube mills in cyanide solution and filtered in two 200-ton Merrill presses similar to those in use at the Homestake mine and other modern plants where filter pressing is adapted to the ore. Zinc dust precipitation also will be installed, making the plant conform to the most approved ideas in cyanidation of roasted ores.Notes/Text been Edited:
Abstracted & slightly rewritten from larger textInternet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 127
- Hathi Trust Digital Library: ⊞ Metallurgical and Chemical Engineering 1912 (Volume 10)
Above Info was Last Updated on 08.02.2023 (11:15:41)
Above Info was First Seen 06.02.2023
Type/Category of Info:
ArticleInfo Source From:
Mining Science. Volume: 65 [LXV], Issue No. 1666Info Publication Date:
January 4, 1912Info found on page:
15Info Title:
Portland Mill in Process of Changing to Cyanide The process of installing the cyanide treatment at the Portland mill in Colorado City, to replace the chlorination process, will be half completed by February 17, when the first section, capable of treating 200 tons a day, will be completed.
Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 15
- Hathi Trust Digital Library: ⊞ Mining Science; Volume 65; January to June 1912
Above Info was Last Updated on 19.06.2023 (08:41:29)
Above Info was First Seen 19.06.2023
Type/Category of Info:
General Mining NewsInfo Source From:
The Engineering and Mining Journal. Volume: 92 [XCII], Issue No. 26Info Publication Date:
December 23, 1911Info found on page:
1245Info Title:
Golden Cycle Mill Charges, Adopted From Portland Mill Open Rates The Portland company's open rates, which have been adopted by the Golden Cycle company, are as follows:
Ore up to $10 per ton, freight and treatment charges, $4
$10 to $15, $5.25
$15 to $20, $6
$20 to $25, $6.50
$25 to $30, $7
$30 to $40, $7.50
$40 to $60, $8.50
$60 to $100, $8.75
$100 to $150, $9.75
$150 to $200, $10.75
$200 to $250, $11.75
above $250, $12.75.
It is rumored that on Jan. 1 there will be some change in both the open and contract rates.
Ore up to $10 per ton, freight and treatment charges, $4$10 to $15, $5.25$15 to $20, $6$20 to $25, $6.50$25 to $30, $7$30 to $40, $7.50$40 to $60, $8.50$60 to $100, $8.75$100 to $150, $9.75$150 to $200, $10.75$200 to $250, $11.75above $250, $12.75. It is rumored that on Jan. 1 there will be some change in both the open and contract rates.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library: ⊞ Direct to Page 1245
Above Info was Last Updated on 30.10.2020 (11:04:30)
Above Info was First Seen 31.03.2019
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Science. Volume: 64 [LXIV], Issue No. 1664Info Publication Date:
December 21, 1911Info found on page:
ad40Info Title:
Treatment Charges at Portland & Golden Cycle Mills The Portland Co.'s open rates, which have been adopted by the Golden Cycle Co., follow:
Ore up to $10 a ton, freight and treatment charges, $4
$10 to $15, $5.25
$15 to $20, $6
$20 to $25, $6.50
$26 to $30, $7
$30 to $40, $7.50
$40 to $60, $8.50
$60 to $100, $8.75
$100 to $150, $9.75
$150 to $200, $10.75
$200 to $250, $11.75
above $250, $12.75.
It is rumored in mining circles that Jan. 1 there will be some change in both the open and contract rates.
Ore up to $10 a ton, freight and treatment charges, $4$10 to $15, $5.25$15 to $20, $6$20 to $25, $6.50$26 to $30, $7$30 to $40, $7.50$40 to $60, $8.50$60 to $100, $8.75$100 to $150, $9.75$150 to $200, $10.75$200 to $250, $11.75above $250, $12.75. It is rumored in mining circles that Jan. 1 there will be some change in both the open and contract rates.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ ad40
- Hathi Trust Digital Library: ⊞ Mining Science; Volume 64; July to December 1911
Above Info was Last Updated on 17.06.2023 (19:14:28)
Above Info was First Seen 17.06.2023
Type/Category of Info:
Special/Editorial CorrespondenceInfo Source From:
The Engineering and Mining Journal. Volume: 92 [XCII], Issue No. 25Info Publication Date:
December 16, 1911Info found on page:
1195Info Title:
Portland Mill Treated Tonnage (But Which Mill is It?) Denver Dec. 9—The Portland mill reports 11,800 tons treated in December{might possible be a typo for November?].
Notes/Text been Edited:
Abstracted from a somewhat longer text.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library: ⊞ Direct to Page 1195
Above Info was Last Updated on 30.10.2020 (11:04:30)
Above Info was First Seen 30.03.2019
Type/Category of Info:
Editorial LeaderInfo Source From:
The Mining Magazine. Volume: 5 [V], Issue No. 6Info Publication Date:
December 1911Info found on page:
409Info Title:
Portland Mill Left Chlorination for Cyaniding THE BATTLE of the processes has been nowhere waged more vigorously than in Colorado, where chlorination and cyanidation have competed with varying success during two decades for preference in the treatment of the ores of Cripple Creek.
Cyanidation is the victor, for it has been apparent for several years that the application of tube-milling and cyanidation to the tailing from the chlorination plants had placed these in a humiliating position. The Portland Gold Mining Company has recently changed its mill to cyanidation.
Cyanidation is the victor, for it has been apparent for several years that the application of tube-milling and cyanidation to the tailing from the chlorination plants had placed these in a humiliating position. The Portland Gold Mining Company has recently changed its mill to cyanidation.Notes/Text been Edited:
Abstracted and partly rewritten from source text.Internet Source Text Link(s) {Found/Seen/Known]:
- Internet Archive: ⊞ The Mining Magazine (December 1911; p409)
Above Info was Last Updated on 10.10.2021 (18:51:24)
Above Info was First Seen 15.05.2021
Type/Category of Info:
ArticleInfo Source From:
Mining Science. Volume: 64 [LXIV], Issue No. 1650Info Publication Date:
September 14, 1911Info found on page:
253Info Title:
Portland Mill Will Change to CyanideCYANIDING TO REPLACE CHLORINATION.
———
The Portland Gold Mining Co. is substituting the cyanide for the chlorination process of treating ore at its main mill in West Colorado Springs. The first section, capable of treating 200 tons daily, will be completed January 1, according to present plans, and the second section will be ready for operation about July 1.
The present chlorine plant has a capacity of 350 tons. When the two sections; with their combined capacity of 400 tons, are installed, the mill will keep in reserve part of the old machinery, so that a chlorine section capable of handling 150 tons will be ready for use at any time.
The Cyanide tailings plant of the company at West Colorado Springs, which was installed about five years ago, will continue to handle the tailings dump of the mill, left over from the chlorination.
Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 253
- Hathi Trust Digital Library: ⊞ Mining Science; Volume 64; July to December 1911
Above Info was Last Updated on 29.05.2023 (07:30:26)
Above Info was First Seen 29.05.2023
Type/Category of Info:
ArticleInfo Source From:
Mining Science. Volume: 64 [LXIV], Issue No. 1647Info Publication Date:
August 24, 1911Info found on page:
177Info Title:
Portland Mill July 1911 Output During July the Portland plant processed 10,000 tons with an average value of $20.00 and a bullion value of $200,000.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library: ⊞ Mining Science; Volume 64; July to December 1911
- Hathi Trust Digital Library; Link to Page: ⊞ 177
Above Info was Last Updated on 26.05.2023 (08:28:31)
Above Info was First Seen 26.05.2023
Type/Category of Info:
Editorial LeaderInfo Source From:
The Engineering and Mining Journal. Volume: 92 [XCII], Issue No. 5Info Publication Date:
July 29, 1911Info found on page:
195Info Title:
Chlorination of Cripple Creek Ore Lost Out to Cyaniding In the early days of gold milling in the Cripple Creek district the cyanide mills were worsted in the competition with the chlorination works and, for many years, the latter held the field.
Improvements in cyanidation, however, altered the conditions, and the cyanide mills are now undoubtedly ahead.
Emphasis is given to this conclusion by the fact that the Portland company recently decided to change its mill at Colorado City, having a capacity for the treatment of 10,000 tons of ore per month, from the chlorination to the cyanide process.
This will leave the United States Reduction and Refining Company with the only chlorination mill in the field, and three of its chlorination mills are idle.
Improvements in cyanidation, however, altered the conditions, and the cyanide mills are now undoubtedly ahead. Emphasis is given to this conclusion by the fact that the Portland company recently decided to change its mill at Colorado City, having a capacity for the treatment of 10,000 tons of ore per month, from the chlorination to the cyanide process. This will leave the United States Reduction and Refining Company with the only chlorination mill in the field, and three of its chlorination mills are idle.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library: ⊞ Direct to Page 195
Above Info was Last Updated on 30.10.2020 (11:04:30)
Above Info was First Seen 25.03.2019
Type/Category of Info:
ArticleInfo Source From:
Mining Science. Volume: 64 [LXIV], Issue No. 1641Info Publication Date:
July 13, 1911Info found on page:
35Info Title:
Portland Mill June 1911 Output During June the Portland plant in Colorado City processed 9,800 tons with an average value of $21.50 and a bullion value of $210,700.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form, fixed typo error for location and Bullion Value.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 35
- Hathi Trust Digital Library: ⊞ Mining Science; Volume 64; July to December 1911
Above Info was Last Updated on 22.05.2023 (08:24:58)
Above Info was First Seen 22.05.2023
Type/Category of Info:
ArticleInfo Source From:
Metallurgical and Chemical Engineering. Volume: 9 [IX], Issue No. 7Info Publication Date:
July 1911Info found on page:
338-339Info Title:
Portland Gold Mining Co. Abandons ChlorinationChlorination Abandoned.
It is generally understood that the chlorination plant of the Portland Gold Mining Company at Colorado Springs will be remodeled for use as a cyanide plant. The company treats Cripple Creek ore, and is using a combination of the chlorination and cyanide processes.
The raw ore is first ground and roasted, then treated by chlorination, the tailings being concentrated on tables. The table concentrates are shipped to smelters, and the table tailings classified into sand and slime. The sand is ground in tube mills in cyanide solution, and the gold solutions recovered by decantation and precipitated on zinc shavings.
In addition to treating the chlorination tailings by cyanidation, the company has treated a considerable tonnage of its old accumulated tailings by the same method. The total tonnage daily treated by cyanide has been about 500 tons, equally divided between current and old tailings.
The chlorine is generated by the action of sulphuric acid on bleaching powder.
It is generally understood that the chlorination plant of the Portland Gold Mining Company at Colorado Springs will be remodeled for use as a cyanide plant. The company treats Cripple Creek ore, and is using a combination of the chlorination and cyanide processes. The raw ore is first ground and roasted, then treated by chlorination, the tailings being concentrated on tables. The table concentrates are shipped to smelters, and the table tailings classified into sand and slime. The sand is ground in tube mills in cyanide solution, and the gold solutions recovered by decantation and precipitated on zinc shavings. In addition to treating the chlorination tailings by cyanidation, the company has treated a considerable tonnage of its old accumulated tailings by the same method. The total tonnage daily treated by cyanide has been about 500 tons, equally divided between current and old tailings. The chlorine is generated by the action of sulphuric acid on bleaching powder.Notes/Text been Edited:
Abstracted & slightly rewritten from larger text about 'The Western Metallurgical Field' p338->329, only taking a part linked to Cripple CreekInternet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 338
- Hathi Trust Digital Library: ⊞ Metallurgical and Chemical Engineering 1911 (Volume 9)
Above Info was Last Updated on 06.02.2023 (13:37:07)
Above Info was First Seen 06.02.2023
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Science. Volume: 63 [LXIII], Issue No. 1637Info Publication Date:
June 15, 1911Info found on page:
624Info Title:
Portland Mill May 1911 Output During May the Portland plant in Colorado Springs processed 10,000 tons with an average value of $21.00 and a bullion value of $210,000.00.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 624
- Hathi Trust Digital Library: ⊞ Mining Science; Volume 63; January to June 1911
Above Info was Last Updated on 20.05.2023 (08:31:04)
Above Info was First Seen 20.05.2023
Type/Category of Info:
PersonalsInfo Source From:
Mining Science. Volume: 63 [LXIII], Issue No. 1629Info Publication Date:
April 20, 1911Info found on page:
425Info Title:
Mr. George M. Taylor Been Appointed General Manager George M. Taylor, hitherto assistant manager of the Portland Gold Mining Co.'s mill at Colorado City, has been appointed general manager to take the place made vacant by the death of J. B. Daniels.
Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 425
- Hathi Trust Digital Library: ⊞ Mining Science; Volume 63; January to June 1911
Above Info was Last Updated on 14.05.2023 (07:47:35)
Above Info was First Seen 14.05.2023
Type/Category of Info:
PersonalsInfo Source From:
Mining Science. Volume: 63 [LXIII], Issue No. 1628Info Publication Date:
April 13, 1911Info found on page:
399Info Title:
Mr. J. B. Daniels Died Last Week J. B. Daniels, superintendent and builder of the Portland mill at Colorado City, died last week following an operation for appendicitis.
Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 399
- Hathi Trust Digital Library: ⊞ Mining Science; Volume 63; January to June 1911
Above Info was Last Updated on 12.05.2023 (11:32:23)
Above Info was First Seen 12.05.2023
Type/Category of Info:
ArticleInfo Source From:
Mining Science. Volume: 63 [LXIII], Issue No. 1628Info Publication Date:
April 13, 1911Info found on page:
399Info Title:
Cripple Creek District March 1911 OutputTable has multiple errors; numbers don't match the given sums at the bottom total, neither does the sum per line always! Unknown where errors are, so I made best guesses!
CRIPPLE CREEK ORE PRODUCTION.
———
According to statements of the smelter and mill representatives and the accompanying estimates of values, the output of Cripple Creek mines in March amounted to 73,125 tons, carrying a gross bullion value of $1,358,455. This production is 3,979 tons in excess of that of February for tonnage, and $105,401 in value.
Increases are shown at all of the plants, with the local mills handling an exceptionally heavy tonnage. This output is largely due to the favorable weather condition. The output:
| Plant and location |
Tonnage |
Av. Value |
Total Value |
|---|---|---|---|
| Standard Mill (U. S. R. & R.), Colorado City | 14,350 14,050 |
22.00 $22.54 |
315,700 $316,700 |
| Smelters, Denver & Pueblo | 4,325 4,025 |
65.00 $67.24 |
270,925 $270,625 |
| Golden Cycle, Colorado City | 25,200 25,000 |
$20.00 | 504,000 $500,000 |
| Portland mill, Colorado City | 10,000 | $20.00 | $200,000 |
| Portland mill, Battle Mountain | 8,800 | $3.60 | $31,680 |
| Stratton's Independence, Battle Mountain | 9,250 | $3.40 | 32,450 $31,450 |
| Wild Horse mill, Bull Hill | 12,000 2,000 |
3.00 $4.00 |
13,600 $8,000 |
| Totals | 73,125 | $1,358,455 |
Notes/Text been Edited:
Table has multiple errors; numbers don't match sums at the bottom total, nor does per line always! Unknown where errors are, so I made best guesses!Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 399
- Hathi Trust Digital Library: ⊞ Mining Science; Volume 63; January to June 1911
Above Info was Last Updated on 14.05.2023 (07:30:41)
Above Info was First Seen 13.05.2023
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Science. Volume: 63 [LXIII], Issue No. 1623Info Publication Date:
March 9, 1911Info found on page:
274Info Title:
Portland Mill Working Hard The Portland mill is handling its regular tonnage, averaging around 325 tons a day. Some days the tonnage goes as high as 350 and 360 tons. One of the three tube mills on the mill site is in operation and the other two mills, used to grind the ore to a smaller screen, will soon be installed.
One of the important improvements made in the last few months is the installation of the fourth Dorr thickener. Improvements are also being made in the crushing department.
One of the important improvements made in the last few months is the installation of the fourth Dorr thickener. Improvements are also being made in the crushing department.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 274
- Hathi Trust Digital Library: ⊞ Mining Science; Volume 63; January to June 1911
Above Info was Last Updated on 10.05.2023 (18:56:45)
Above Info was First Seen 10.05.2023
Type/Category of Info:
Special/Editorial CorrespondenceInfo Source From:
The Mining Magazine. Volume: 4 [IV], Issue No. 1Info Publication Date:
January 1911Info found on page:
34Info Title:
Portland Mill Satisfy The Portland G.M. Co. plant at Colorado Springs, handling high-grade ore, continues to give satisfaction.
Notes/Text been Edited:
AbstractedInternet Source Text Link(s) {Found/Seen/Known]:
- Internet Archive: ⊞ The Mining Magazine (January 1911; p34)
Above Info was Last Updated on 10.10.2021 (18:51:24)
Above Info was First Seen 05.05.2021
Type/Category of Info:
Special/Editorial CorrespondenceInfo Source From:
The Mining Magazine. Volume: 4 [IV], Issue No. 1Info Publication Date:
January 1911Info found on page:
34Info Title:
Portland Mill, Colorado City Production; November 1910 During November Shipments from the district to the Portland Mill amounted to 10,0000 tons of an average $20.00 per ton for a total of $200,000.
Notes/Text been Edited:
Abstracted and partly rewritten from source text.Internet Source Text Link(s) {Found/Seen/Known]:
- Internet Archive: ⊞ The Mining Magazine (January 1911; p34)
Above Info was Last Updated on 10.04.2022 (14:35:38)
Above Info was First Seen 05.05.2021
Type/Category of Info:
Correspondence and DiscussionInfo Source From:
Metallurgical and Chemical Engineering. Volume: 9 [IX], Issue No. 1Info Publication Date:
January 1911Info found on page:
19Info Title:
Chlorination Process Still Used on Roasted Cripple Creek OresChlorination.
The mills of the Portland Gold Mining Company and United States Reduction & Refining Company, both at Colorado City, have continued to use the chlorination process on roasted Cripple Creek ores, following this with cyanidation of the tailings.
At the former the chlorine is generated from bleaching powder and sulphuric acid, and at the latter by an electrolytic plant of 100 McDonald cells.
The barrel charge at the Portland consists of 20,000 lb. of ore, 300 of acid and 100 of bleach (30 per cent available chlorine). At the other plant the ore charge is the same, with the addition of chlorine solution of suitable strength.
The mills of the Portland Gold Mining Company and United States Reduction & Refining Company, both at Colorado City, have continued to use the chlorination process on roasted Cripple Creek ores, following this with cyanidation of the tailings. At the former the chlorine is generated from bleaching powder and sulphuric acid, and at the latter by an electrolytic plant of 100 McDonald cells. The barrel charge at the Portland consists of 20,000 lb. of ore, 300 of acid and 100 of bleach (30 per cent available chlorine). At the other plant the ore charge is the same, with the addition of chlorine solution of suitable strength.Notes/Text been Edited:
Abstracted from larger text about 'Status of Metallurgy in Colorado in 1910' p18->20, only taking a part linked to Cripple CreekInternet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 19
- Hathi Trust Digital Library: ⊞ Metallurgical and Chemical Engineering 1911 (Volume 9)
Above Info was Last Updated on 06.02.2023 (13:39:03)
Above Info was First Seen 04.02.2023
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Science. Volume: 62 [LXII], Issue No. 1610Info Publication Date:
December 8, 1910Info found on page:
558Info Title:
Portland Mill November 1910 Output During November the Portland plant in Colorado City processed 10,000 tons with an average value of $20.00 and a bullion value of $200,000.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library: ⊞ Mining Science; Volume 61; July to December 1910
- Hathi Trust Digital Library; Link to Page: ⊞ 558
Above Info was Last Updated on 03.05.2023 (10:05:57)
Above Info was First Seen 12.07.2010
Type/Category of Info:
General Mining NewsInfo Source From:
The Engineering and Mining Journal. Volume: 90 [XC], Issue No. 22Info Publication Date:
November 26, 1910Info found on page:
1077Info Title:
Portland Mill Restores Old Treatment Charges The Portland Gold Mining Company has notified Cripple Creek shippers that the old treatment rates will be restored, as it has been found there was no profit in treating custom ores at the charges in effect during the last few weeks.
Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library: ⊞ Link to Page
Above Info was Last Updated on 24.12.2021 (21:28:11)
Above Info was First Seen 25.03.2010
Type/Category of Info:
ArticleInfo Source From:
Mining Science. Volume: 62 [LXII], Issue No. 1608Info Publication Date:
November 24, 1910Info found on page:
500Info Title:
Portland Mill Restores Higher RatesPORTLAND RESTORES ITS RATES.
———
The Portland Gold Mining Co. of Cripple Creek, which operates a custom mill at Colorado City, has sent notices to shippers that the old rates of treatment, in force until a few weeks ago, when the company met a reduction of the United States Reduction and Refining Co., will prevail in the future.
President Frank Peck is quoted as saying that under the rates in effect for a few weeks past the ore could not be treated at a profit, and that "there is no use treating ore unless there is a profit in it."
——— The Portland Gold Mining Co. of Cripple Creek, which operates a custom mill at Colorado City, has sent notices to shippers that the old rates of treatment, in force until a few weeks ago, when the company met a reduction of the United States Reduction and Refining Co., will prevail in the future. President Frank Peck is quoted as saying that under the rates in effect for a few weeks past the ore could not be treated at a profit, and that "there is no use treating ore unless there is a profit in it."Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 500
- Hathi Trust Digital Library: ⊞ Mining Science; Volume 61; July to December 1910
Above Info was Last Updated on 02.05.2023 (08:00:57)
Above Info was First Seen 11.07.2010
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Science. Volume: 62 [LXII], Issue No. 1606Info Publication Date:
November 10, 1910Info found on page:
453Info Title:
Portland Mill October 1910 Output During October the Portland plant in Colorado City processed 10,000 tons with an average value of $20.00 for a total value of $200,000.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence formInternet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 453
- Hathi Trust Digital Library: ⊞ Mining Science; Volume 61; July to December 1910
Above Info was Last Updated on 30.04.2023 (21:24:08)
Above Info was First Seen 30.04.2023
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Science. Volume: 62 [LXII], Issue No. 1597Info Publication Date:
September 8, 1910Info found on page:
236Info Title:
Portland Mill August 1910 Output During August the Portland mill in Colorado City processed 9,000 tons with an average value of $20.00 and a bullion value of $180,000. The mill reports a decrease of 1,000 tons compared with last month, due to the fact that more ore is being run through the district mill for experimental purposes and much development is being carried on.
Notes/Text been Edited:
Abstracted from source text in table, restyled/written to sentence form and I corrected as best I could a number typo for Tonnage.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 236
- Hathi Trust Digital Library: ⊞ Mining Science; Volume 61; July to December 1910
Above Info was Last Updated on 28.04.2023 (12:34:58)
Above Info was First Seen 28.04.2023
Type/Category of Info:
Industrial/Construction NotesInfo Source From:
Mining Science. Volume: 62 [LXII], Issue No. 1595Info Publication Date:
August 25, 1910Info found on page:
185Info Title:
Portland Mill Gets New Weighting Scale Fairbanks, Morse & Co. are shipping to the Colorado City plant of the Portland Gold Mining Co. one of the largest and most finely constructed railroad track receiving scales which has ever been built or placed in the West. Its capacity is 150 tons, and it is designed for the handling of high grade materials entering the mill.
It is steel construction throughout and of the finest workmanship, and will weigh anything from a feather to its full capacity. The specific requirements of a scale of this character (with particular reference to the use the Portland Gold Mining Co. is making of this scale at Colorado City) are such as demand most careful consideration, and they have secured in this article the very best money can buy or skilled labor can produce.
It is steel construction throughout and of the finest workmanship, and will weigh anything from a feather to its full capacity. The specific requirements of a scale of this character (with particular reference to the use the Portland Gold Mining Co. is making of this scale at Colorado City) are such as demand most careful consideration, and they have secured in this article the very best money can buy or skilled labor can produce.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 185
- Hathi Trust Digital Library: ⊞ Mining Science; Volume 61; July to December 1910
Above Info was Last Updated on 27.04.2023 (15:36:05)
Above Info was First Seen 27.04.2023
Type/Category of Info:
General Mining NewsInfo Source From:
The Engineering and Mining Journal. Volume: 90 [XC], Issue No. 7Info Publication Date:
August 13, 1910Info found on page:
335Info Title:
Stratton Estate - American Eagle Shipment Paid Good Stratton Estate—A 23-ton shipment of ore mined on the first level of the American Eagle shaft has been settled for by the Portland (valley) mill at the rate of $128 per ton.
Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library: ⊞ Link to Page
Above Info was Last Updated on 20.12.2021 (08:10:12)
Above Info was First Seen 24.03.2010
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Science. Volume: 62 [LXII], Issue No. 1593Info Publication Date:
August 11, 1910Info found on page:
139Info Title:
Portland Mill July 1910 Output During July the Portland plant in Colorado City processed 10,000 tons with an average value of $20.00 and a bullion value of $200,000.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 139
- Hathi Trust Digital Library: ⊞ Mining Science; Volume 61; July to December 1910
Above Info was Last Updated on 27.04.2023 (13:16:32)
Above Info was First Seen 27.04.2023
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Science. Volume: 62 [LXII], Issue No. 1592Info Publication Date:
August 4, 1910Info found on page:
116Info Title:
Portland Co. Mill(s) Gets Stratton Estate Ore The ore from the Stratton estate is shipped to the Portland Co., and it is said the proposed mill on Globe Hill will be constructed on similar lines and use the same process as the Battle Mountain plant of that company.
Notes/Text been Edited:
Abstracted and slightly rewritten from source text.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 116
- Hathi Trust Digital Library: ⊞ Mining Science; Volume 61; July to December 1910
Above Info was Last Updated on 27.04.2023 (09:25:50)
Above Info was First Seen 27.04.2023
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Science. Volume: 62 [LXII], Issue No. 1588Info Publication Date:
July 7, 1910Info found on page:
18Info Title:
Portland Mill June 1910 Output During June the Portland plant in Colorado Springs processed 10,000 tons with an average value of $20.00 and a total value of $200,000,00.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 18
- Hathi Trust Digital Library: ⊞ Mining Science; Volume 61; July to December 1910
Above Info was Last Updated on 24.04.2023 (09:46:59)
Above Info was First Seen 11.07.2010
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Science. Volume: 61 [LXI], Issue No. 1584Info Publication Date:
June 9, 1910Info found on page:
548Info Title:
Portland Mill May 1910 Output During May the Portland plant in Colorado City processed 10,350 tons with an average value of $20.00 giving a total value of $207,000.00.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 548
- Hathi Trust Digital Library: ⊞ Mining Science; Volume 61; January to June 1910
Above Info was Last Updated on 21.04.2023 (18:39:38)
Above Info was First Seen 29.06.2010
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Science. Volume: 61 [LXI], Issue No. 1575Info Publication Date:
April 7, 1910Info found on page:
331Info Title:
Portland Mill March 1910 Output During March the Portland plant in Colorado City processed 10,000 tons with an average value of $20.00 giving a total value of $200,000.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 331
- Hathi Trust Digital Library: ⊞ Mining Science; Volume 61; January to June 1910
Above Info was Last Updated on 19.04.2023 (09:08:40)
Above Info was First Seen 27.06.2010
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Science. Volume: 61 [LXI], Issue No. 1571Info Publication Date:
March 10, 1910Info found on page:
236Info Title:
Portland Mill February 1910 Output During February the Portland plant processed 10,000 tons with an average value of $18.00 giving a total value of $180,000.00.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 236
- Hathi Trust Digital Library: ⊞ Mining Science; Volume 61; January to June 1910
Above Info was Last Updated on 18.04.2023 (09:02:34)
Above Info was First Seen 27.06.2010
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Science. Volume: 61 [LXI], Issue No. 1563Info Publication Date:
January 13, 1910Info found on page:
44Info Title:
Portland Mill December 1909 Output During December 1909 the Portland mill processed 10,000 tons with an average value of $19.00 for a total value of $190,000.
Notes/Text been Edited:
Abstracted and partly rewritten from source text.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 44
- Hathi Trust Digital Library: ⊞ Mining Science; Volume 61; January to June 1910
Above Info was Last Updated on 10.04.2023 (10:56:56)
Above Info was First Seen 23.06.2010
Type/Category of Info:
ArticleInfo Source From:
The Mining Magazine. Volume: 2 [II], Issue No. 1Info Publication Date:
January 1910Info found on page:
23Info Title:
Portland Mill, Colorado City Production; November 1909 The Portland mill crushed in November 9000 tons worth $171,000.
Notes/Text been Edited:
Abstracted and slightly rewritten from source text.Internet Source Text Link(s) {Found/Seen/Known]:
- Internet Archive: ⊞ The Mining Magazine (January 1910; p23)
Above Info was Last Updated on 10.10.2021 (18:51:24)
Above Info was First Seen 05.05.2021
Type/Category of Info:
Correspondence and DiscussionInfo Source From:
Mining and Scientific Press. Volume: 99 [XCIX], Issue No. 2579; 26Info Publication Date:
December 25, 1909Info found on page:
859Info Title:
Clancy Process Not Used by Any Portland MillResearches upon Cripple Creek Telluride Ore.
The Editor:
Sir—Kindly give publicity to this letter in reply to Henry B. Haigh's article in your issue of November 20.
John Collins Clancy was never chief chemist of the Portland mill. He worked in our laboratory a few months at day's pay. J. M. Tippett was and is the only chief chemist we ever had and Thos. B. Crowe was his assistant before his promotion. The use of cyanogen iodide in connection with potassium cyanide as a solvent for telluride of gold and the manner of producing it in contact with the ore, was the invention of Mr. Crowe and Mr. Tippett and was never claimed by Mr. Clancy until after he left the service of the Portland company.
Our laboratory notes from day to day show this, and Mr. Clancy was not even in the State of Colorado when the experiments were made, as shown by the company's records. The process was abandoned by the Portland company over a year ago on account of the high cost of the chemicals used.
The Portland company is not now using in its new mill or any of its old mills any process Mr. Clancy ever used during the short time he was with the Portland company: or any chemical ever suggested by him to us, or any process, or chemical that could be construed as relating to any patent or suggestion of his, even in the most remote manner.
The Portland Gold Mining Co.,
By Frank G. Peck, President.
Colorado Springs, Colorado, December 2.
The Editor: Sir—Kindly give publicity to this letter in reply to Henry B. Haigh's article in your issue of November 20. John Collins Clancy was never chief chemist of the Portland mill. He worked in our laboratory a few months at day's pay. J. M. Tippett was and is the only chief chemist we ever had and Thos. B. Crowe was his assistant before his promotion. The use of cyanogen iodide in connection with potassium cyanide as a solvent for telluride of gold and the manner of producing it in contact with the ore, was the invention of Mr. Crowe and Mr. Tippett and was never claimed by Mr. Clancy until after he left the service of the Portland company. Our laboratory notes from day to day show this, and Mr. Clancy was not even in the State of Colorado when the experiments were made, as shown by the company's records. The process was abandoned by the Portland company over a year ago on account of the high cost of the chemicals used. The Portland company is not now using in its new mill or any of its old mills any process Mr. Clancy ever used during the short time he was with the Portland company: or any chemical ever suggested by him to us, or any process, or chemical that could be construed as relating to any patent or suggestion of his, even in the most remote manner.The Portland Gold Mining Co.,By Frank G. Peck, President.Colorado Springs, Colorado, December 2.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library: ⊞ Link to Page
- Hathi Trust Digital Library: ⊞ Mining and Scientific Press. v.99 July-Dec.1909.
Above Info was Last Updated on 30.04.2022 (23:01:14)
Above Info was First Seen 30.04.2022
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Science. Volume: 60 [LX], Issue No. 1558Info Publication Date:
December 9, 1909Info found on page:
547Info Title:
Portland Mill November Output The Portland G. M. Co. Mill treated during November a tonnage of 9,000 tons with an average value of $19.00 for a total of $171,000.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form.Found this exact text used in the following Publications:
- ⊞ Mining Science, Denver, Colo., December 9, 1909 (page 547)
- ⊞ Mining and Scientific Press, San Francisco, December 11, 1909 (page 805)
Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library: ⊞ Link to Page
- Hathi Trust Digital Library: ⊞ Mining Science - Jul-Des 1909
Above Info was Last Updated on 14.04.2022 (15:09:51)
Above Info was First Seen 23.06.2010
Type/Category of Info:
General Mining NewsInfo Source From:
Mining and Scientific Press. Volume: 99 [XCIX], Issue No. 2570; 17Info Publication Date:
October 23, 1909Info found on page:
546Info Title:
Portland Mill Being Re-Modeled The mill buildings of the Portland Gold Mining Co. are being re-modeled and the company expects to have the new machinery running before the end of the year.
Notes/Text been Edited:
Abstracted and slightly rewritten from source text.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library: ⊞ Link to Page
- Hathi Trust Digital Library: ⊞ Mining and Scientific Press. v.99 July-Dec.1909.
Above Info was Last Updated on 28.04.2022 (11:10:42)
Above Info was First Seen 28.04.2022
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Science. Volume: 60 [LX], Issue No. 1549Info Publication Date:
October 7, 1909Info found on page:
331Info Title:
Portland Mill September Output The Portland Mill treated during September a tonnage of 10,000 tons with an average value of $20.00 for a total of $200,000.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library: ⊞ Link to Page
- Hathi Trust Digital Library: ⊞ Mining Science - Jul-Des 1909
Above Info was Last Updated on 11.04.2022 (13:38:29)
Above Info was First Seen 22.06.2010
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Science. Volume: 60 [LX], Issue No. 1545Info Publication Date:
September 9, 1909Info found on page:
235Info Title:
Portland Mill August Output The Portland Mill treated during August a tonnage of 10,000 tons with an average value of $20,00 for a total of $200,000.00.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library: ⊞ Link to Page
- Hathi Trust Digital Library: ⊞ Mining Science - Jul-Des 1909
Above Info was Last Updated on 10.04.2022 (14:34:04)
Above Info was First Seen 10.04.2022
Type/Category of Info:
General Mining NewsInfo Source From:
Mining and Scientific Press. Volume: 99 [XCIX], Issue No. 2559; 6Info Publication Date:
August 7, 1909Info found on page:
172Info Title:
Modoc Shipment The Modoc Mining Co. shipped two cars of ore to the Colorado City mills.
Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library: ⊞ Link to Page
- Hathi Trust Digital Library: ⊞ Mining and Scientific Press. v.99 July-Dec.1909.
Above Info was Last Updated on 23.04.2022 (00:03:50)
Above Info was First Seen 22.04.2022
Type/Category of Info:
General Mining NewsInfo Source From:
Mining and Scientific Press. Volume: 99 [XCIX], Issue No. 2558; 5Info Publication Date:
July 31, 1909Info found on page:
138Info Title:
Portland Mill in Colorado Sprngs to Change The plans for a new mill at the Portland Mining Co.'s property at Colorado Springs have been completed and the contracts for the construction awarded.
During the building of the mill the quarterly dividends will be reduced 2c. per share. George M. Taylor is superintendent.
During the building of the mill the quarterly dividends will be reduced 2c. per share. George M. Taylor is superintendent.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library: ⊞ Link to Page
- Hathi Trust Digital Library: ⊞ Mining and Scientific Press. v.99 July-Dec.1909.
Above Info was Last Updated on 22.04.2022 (08:36:21)
Above Info was First Seen 22.04.2022
Type/Category of Info:
General Mining NewsInfo Source From:
Mining and Scientific Press. Volume: 99 [XCIX], Issue No. 2555; 2Info Publication Date:
July 10, 1909Info found on page:
43Info Title:
Portland Mine Ships 2-300 Tons Per Day to Mill The Portland mine is shipping between 200 and 250 tons per day to the Colorado City plant.
Notes/Text been Edited:
Abstracted and slightly rewritten from source text.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library: ⊞ Link to Page
- Hathi Trust Digital Library: ⊞ Mining and Scientific Press. v.99 July-Dec.1909.
Above Info was Last Updated on 21.04.2022 (23:33:08)
Above Info was First Seen 21.04.2022
Type/Category of Info:
General Mining NewsInfo Source From:
The Western Investors Review. Volume: 15 [XV], Issue No. 12Info Publication Date:
July 1909Info found on page:
10Info Title:
Portland Mill June 1909 Output During June the Portland plant processed 10,500 tons with an average value of $19.00 and a bullion value of $199,500.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 10
- Hathi Trust Digital Library: ⊞ The Western Investors Review, Vol.15 (June 1908-August 1909)
Above Info was Last Updated on 24.08.2023 (12:19:54)
Above Info was First Seen 19.10.2010
Type/Category of Info:
General Mining NewsInfo Source From:
The Western Investors Review. Volume: 15 [XV], Issue No. 8Info Publication Date:
February 1909Info found on page:
21Info Title:
All Grades of Ore Treated The Portland company, which has added a new roasting plant to the Colorado City plant, are asking for all grades of ore for treatment.
Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 21
- Hathi Trust Digital Library: ⊞ The Western Investors Review, Vol.15 (June 1908-August 1909)
Above Info was Last Updated on 22.08.2023 (08:17:57)
Above Info was First Seen 19.10.2010
Type/Category of Info:
ArticleInfo Source From:
The Mineral Industry, Its Statistics, Technology & Trade in the U.S. and Other Countries. Volume: 16 [XVI]Info Publication Date:
September 8, 1908Info found on page:
534Info Title:
Portland Mill 1907 TidbitsRegis Chauvenet wrote large articles about the Portland Mill in the October 24, 1907 (page 378-379) and October 31, 1907 (page 396-398) issues of Mining Reporter of the Portland Mill, but a short general description was given here;
This cyanide plant at Colorado City, Colo., treats chiefly the tailings from the Portland chlorination mill.
The tailings are nominally 14-mesh but 15 to 20 per cent, passes a 200-mesh screen. The average value is $1.40 in gold.
Two 22x5-ft. tube mills each crush 200 tons with one ton of 1.2 lb. KCN solution per 1.5 tons of tailings, 5.2 tons of lime being added per ton of tailings.
The pulp from the mills, 80 per cent, of which passes an 80-mesh screen, is diluted with "barren solution" containing 0.6 lb. KCN per ton, and passes to the decantation and agitation plant.
The decanted solution from this passes through sand filters before going to the zinc thread precipitation.
It was found that the tailings from decantation contained about 60c. of gold, a considerable portion of which was "free gold" of a whitish or gray color. (Probably imperfectly roasted telluride mineral.)
To save this material, blanket launders, 70 ft. long and 2.5 ft. wide, now convey the tube mill product to the decantation plant, with the result that the tailings average 40c. in place of 60c. The decantation process will probably be replaced by a filtration process in the near future.
The present cost of treatment is 50c. per ton.
Notes/Text been Edited:
Abstracted and somewhat rewritten from source text about 'Cyanidation During 1907' by Charles H. Fulton.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library: ⊞ Link to Page
- Hathi Trust Digital Library: ⊞ The Mineral industry. v.16 1907.
Above Info was Last Updated on 23.05.2022 (21:45:55)
Above Info was First Seen 23.05.2022
Type/Category of Info:
General Mining NewsInfo Source From:
The Mining World. Volume: 29 [XXIX], Issue No. 9Info Publication Date:
August 29, 1908Info found on page:
330Info Title:
Portland Cyanide Mill in Course of Construction Cripple Creek—The new Portland cyanide mill is in course of construction and it is expected to be ready for the installation of machinery, which is all on the ground, in the course of two or three weeks. It will have a capacity of 500 tons per day.
Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 330
- Hathi Trust Digital Library: ⊞ The Mining World, Vol. 29 (July-December 1908)
Above Info was Last Updated on 31.12.2023 (13:26:05)
Above Info was First Seen 31.12.2023
Type/Category of Info:
General Mining NewsInfo Source From:
The Mining World. Volume: 29 [XXIX], Issue No. 7Info Publication Date:
August 15, 1908Info found on page:
254Info Title:
Portland Mill Processed 9000 Tons in July Cripple Creek—The Portland Co. shipped 9,000 tons to its mill in Colorado City last month.
Notes/Text been Edited:
AbstractedInternet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 254
- Hathi Trust Digital Library: ⊞ The Mining World, Vol. 29 (July-December 1908)
Above Info was Last Updated on 30.12.2023 (17:21:48)
Above Info was First Seen 30.12.2023
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Science. Volume: 58 [LVIII], Issue No. 7Info Publication Date:
August 13, 1908Info found on page:
137Info Title:
Portland Gold Mining Co. July Production The Portland G. M. Co. produced in the neighborhood of 9,000 tons during the month of July, which was treated at the company's mill in Colorado City. This ore represents a value of nearly $200,000.
Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 137
- Hathi Trust Digital Library: ⊞ Mining Science; Volume 58; July to December 1908
Above Info was Last Updated on 01.04.2023 (07:52:29)
Above Info was First Seen 15.06.2010
Type/Category of Info:
Editorial LeaderInfo Source From:
Mining Science. Volume: 58 [LVIII], Issue No. 6Info Publication Date:
August 6, 1908Info found on page:
102Info Title:
Portland Mill July Output During July the Portland plant processed 8,250 tons with an average value of $22.00 giving a total value of $181,500.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 102
- Hathi Trust Digital Library: ⊞ Mining Science; Volume 58; July to December 1908
Above Info was Last Updated on 01.04.2023 (07:53:54)
Above Info was First Seen 14.06.2010
Type/Category of Info:
General Mining NewsInfo Source From:
The Mining World. Volume: 28 [XXVIII], Issue No. 20Info Publication Date:
May 16, 1908Info found on page:
806Info Title:
Portland Mill April 1908 Output During April the Portland plant processed 8,000 tons making a bullion value of $176,000.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 806
- Hathi Trust Digital Library: ⊞ The Mining World, Vol. 28 (January-June 1908)
Above Info was Last Updated on 25.12.2023 (11:10:59)
Above Info was First Seen 25.12.2023
Type/Category of Info:
General Mining NewsInfo Source From:
The Mining World. Volume: 28 [XXVIII], Issue No. 15Info Publication Date:
April 11, 1908Info found on page:
612Info Title:
Portland Mill March 1908 Output During March the Portland plant processed 8,000 tons making a bullion value of $176,000.00.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 612
- Hathi Trust Digital Library: ⊞ The Mining World, Vol. 28 (January-June 1908)
Above Info was Last Updated on 21.12.2023 (17:19:52)
Above Info was First Seen 21.12.2023
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Science. Volume: 57 [LVII], Issue No. 10Info Publication Date:
March 5, 1908Info found on page:
257Info Title:
Portland Mill February 1908 Production During February, the Portland plant processed 9,000 tons of Cripple Creek ore.
Notes/Text been Edited:
Abstracted from source text and restyled/written to sentence form.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 257
- Hathi Trust Digital Library: ⊞ Mining Science; Volume 57; January to June 1906
Above Info was Last Updated on 09.03.2023 (11:31:13)
Above Info was First Seen 10.06.2010
Type/Category of Info:
General Mining NewsInfo Source From:
The Mining World. Volume: 28 [XXVIII], Issue No. 6Info Publication Date:
February 8, 1908Info found on page:
265Info Title:
Portland Mill January 1908 Output During January the Portland plant processed 7,500 tons with an average value of $21.50 and a bullion value of $161,250.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 265
- Hathi Trust Digital Library: ⊞ The Mining World, Vol. 28 (January-June 1908)
Above Info was Last Updated on 16.12.2023 (20:06:35)
Above Info was First Seen 28.11.2010
Type/Category of Info:
ArticleInfo Source From:
The Mining World. Volume: 28 [XXVIII], Issue No. 4Info Publication Date:
January 25, 1908Info found on page:
135Info Title:
Portland Mill 1907 Production An approximation of the value of the gold produced during 1907 by the Portland mill, at Colorado City (chlorination-cyanidation) is $2,371,088.
Notes/Text been Edited:
Abstracted & slightly rewritten from larger text about 'The World's Supply of Gold & Silver', only taking the part linked to Cripple CreekInternet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 135
- Hathi Trust Digital Library: ⊞ The Mining World, Vol. 28 (January-June 1908)
Above Info was Last Updated on 15.12.2023 (17:22:05)
Above Info was First Seen 15.12.2023
Type/Category of Info:
General Mining NewsInfo Source From:
The Mining World. Volume: 28 [XXVIII], Issue No. 2Info Publication Date:
January 11, 1908Info found on page:
75Info Title:
Portland Mill December 1907 Output During December the Portland plant processed 10,000 tons with an average value of $21 and a bullion value of $210,000.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 75
- Hathi Trust Digital Library: ⊞ The Mining World, Vol. 28 (January-June 1908)
Above Info was Last Updated on 14.12.2023 (20:38:37)
Above Info was First Seen 26.11.2010
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Science. Volume: 57 [LVII], Issue No. 2Info Publication Date:
January 9, 1908Info found on page:
54Info Title:
Portland Co. Happenings December Mining Conditions—The Portland Co. made a remarkable record during the past 12 months, there being handled at the West Colorado Springs plant of the company approximately 227,500 tons, and the dividends paid amounting to $480,000 or 16 cents per share.
Notes/Text been Edited:
Abstracted and slightly rewritten from source text.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 54
- Hathi Trust Digital Library: ⊞ Mining Science; Volume 57; January to June 1906
Above Info was Last Updated on 04.03.2023 (19:02:30)
Above Info was First Seen 07.06.2010
Type/Category of Info:
General Mining NewsInfo Source From:
The Mining World. Volume: 27 [XXVII], Issue No. 23Info Publication Date:
December 7, 1907Info found on page:
1025Info Title:
Portland Mill November 1907 Output During November the Portland plant processed 10,300 tons with an average value of $23.50 and a bullion value of $242,050.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 1025
- Hathi Trust Digital Library: ⊞ The Mining World, Vol. 27 (July-December 1907)
Above Info was Last Updated on 13.12.2023 (18:46:28)
Above Info was First Seen 26.11.2010
Type/Category of Info:
General Mining NewsInfo Source From:
The Mining World. Volume: 27 [XXVII], Issue No. 19Info Publication Date:
November 9, 1907Info found on page:
863Info Title:
Portland Mill October 1907 Output During October the Portland plant processed 11,000 tons with an average value of $25.00 and a bullion value of $275,000.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 863
- Hathi Trust Digital Library: ⊞ The Mining World, Vol. 27 (July-December 1907)
Above Info was Last Updated on 10.12.2023 (11:52:07)
Above Info was First Seen 26.11.2010
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Reporter. Volume: 56 [LVI], Issue No. 15Info Publication Date:
October 10, 1907Info found on page:
338Info Title:
Portland Mill September Output During September the Portland Mill treated 11,500 tons at an average value of $22.00 for a total of $253,000.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 338
- Hathi Trust Digital Library: ⊞ Mining Reporter; Volume 56 - Jul.-Dec. 1907
Above Info was Last Updated on 23.07.2022 (12:11:36)
Above Info was First Seen 23.07.2022
Type/Category of Info:
General Mining NewsInfo Source From:
The Mining World. Volume: 27 [XXVII], Issue No. 14Info Publication Date:
October 5, 1907Info found on page:
570Info Title:
Lucky Gus Lessees Moore, Beckman, Selig & Co. 400 Feet Shipment to Portland Mill Cripple Creek.—Moore, Beckman, Selig and others who recently opened a splendid shoot of ore on the 400 level of the Lucky Gus of the Stratton estate, shipped last week a car of ore to the Portland mill which was estimated to run 2½ ozs. a ton.
Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 570
- Hathi Trust Digital Library: ⊞ The Mining World, Vol. 27 (July-December 1907)
Above Info was Last Updated on 06.12.2023 (17:12:43)
Above Info was First Seen 06.12.2023
Type/Category of Info:
General Mining NewsInfo Source From:
The Western Investors Review. Volume: 14 [XIV], Issue No. 5Info Publication Date:
October 1907Info found on page:
35Info Title:
Portland Mill September 1907 Output During September the Portland plant processed 11,500 tons with an average value of $22.00 and a bullion value of $253,000.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 35
- Hathi Trust Digital Library: ⊞ The Western Investors Review, Vol.14 (July 1907-May 1908)
Above Info was Last Updated on 15.08.2023 (21:17:32)
Above Info was First Seen 18.10.2010
Type/Category of Info:
General Mining NewsInfo Source From:
The Mining World. Volume: 27 [XXVII], Issue No. 8Info Publication Date:
August 24, 1907Info found on page:
327Info Title:
Portland Mill Treats Several Hundred Tons Daily Cripple Creek—The Portland mill is treating 225 to 250 tons daily.
Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 327
- Hathi Trust Digital Library: ⊞ The Mining World, Vol. 27 (July-December 1907)
Above Info was Last Updated on 30.11.2023 (11:09:40)
Above Info was First Seen 25.11.2010
Type/Category of Info:
AdvertisingInfo Source From:
Mining Reporter. Volume: 56 [LVI], Issue No. 8Info Publication Date:
August 22, 1907Info found on page:
ad9Info Title:
Ad; Dunlap Ore Screen -> Treating Cripple Creek OreC. M. HAMPSON
COMMERCIAL AND SALES ENGINEER
DENVER, 523 SEVENTEENTH ST.
The DUNLAP ORE SCREEN
is no experiment.
It has made good under conditions
where no other screen could do the work at all.
It has been tried out,
under the hardest conditions,
in the Portland Mill for 18 months.
Costs less,
screens more,
and is shut down
less than any screen made.
I am Direct Representative for
Atlas Boilers and Engines
Best made. Largest stock Economical. Get my figures
See me for Transmission Machinery.
Dodge Mfg. Co. Line,
also the "Eureka" Water Softener
COMMERCIAL AND SALES ENGINEERDENVER, 523 SEVENTEENTH ST.The DUNLAP ORE SCREENis no experiment.It has made good under conditionswhere no other screen could do the work at all.It has been tried out,under the hardest conditions,in the Portland Mill for 18 months.Costs less,screens more,and is shut downless than any screen made.I am Direct Representative forAtlas Boilers and EnginesBest made. Largest stock Economical. Get my figuresSee me for Transmission Machinery.Dodge Mfg. Co. Line,also the "Eureka" Water SoftenerInternet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ ad9
- Hathi Trust Digital Library: ⊞ Mining Reporter; Volume 56, No. 8
- Hathi Trust Digital Library: ⊞ Mining Reporter; Volume 56 - Jul.-Dec. 1907
Above Info was Last Updated on 20.07.2022 (20:38:14)
Above Info was First Seen 20.07.2022
Type/Category of Info:
General Mining NewsInfo Source From:
The Mining World. Volume: 27 [XXVII], Issue No. 6Info Publication Date:
August 10, 1907Info found on page:
245-246Info Title:
Colorado City Mills Working Hard Cripple Creek.—Both the Eagle and Taylor and Brunton samplers are now purchasing ore for the Golden Cycle mill. The two independent mills at Colorado City are reported to be running at full capacity. The Cycle is treating about 12,000 tons of custom ore each month and the Portland about 3,000 in addition to the output of the two mines.
Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 245
- Hathi Trust Digital Library: ⊞ The Mining World, Vol. 27 (July-December 1907)
Above Info was Last Updated on 28.11.2023 (18:30:59)
Above Info was First Seen 28.11.2023
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Reporter. Volume: 56 [LVI], Issue No. 6Info Publication Date:
August 8, 1907Info found on page:
131Info Title:
Portland Mill July Output The July output of the Portland mill was 8,000 tons with an average value of $24.00 for a total value of $192,000.00.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 131
- Hathi Trust Digital Library: ⊞ Mining Reporter; Volume 56, No. 6
- Hathi Trust Digital Library: ⊞ Mining Reporter; Volume 56 - Jul.-Dec. 1907
Above Info was Last Updated on 20.07.2022 (09:14:01)
Above Info was First Seen 20.07.2022
Type/Category of Info:
ArticleInfo Source From:
Mineral Resources of the United States. Volume: 23 [XXIII]Info Publication Date:
August 1907Info found on page:
238Info Title:
Portland Mill Got Experimental Cyanide Mill During 1906 Considerable interest relative to the question of milling the lower grade ores was manifested during 1906. Not only have several attempts been made from time to time to operate small mills at a profit about the district, but the year 1906 found a number of the largest companies attacking the problem.
The Portland Mining Company erected a 300-ton cyanide plant at Colorado City to treat the tailings from their chlorination plant, and have been carrying on experimental work to discover the most suitable cyanide method to replace their present chlorination mill.
A very small quantity of custom ore, from mines other than the Portland, was treated in 1906, but more oxidized ore will be purchased from time to time to mix with the more refractory ores of the Portland mine.
The Portland Mining Company erected a 300-ton cyanide plant at Colorado City to treat the tailings from their chlorination plant, and have been carrying on experimental work to discover the most suitable cyanide method to replace their present chlorination mill. A very small quantity of custom ore, from mines other than the Portland, was treated in 1906, but more oxidized ore will be purchased from time to time to mix with the more refractory ores of the Portland mine.Notes/Text been Edited:
Abstracted and slightly rewritten from source text.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library: ⊞ US Mineral Resources, 1906 Volume
- Hathi Trust Digital Library; Link to Page: ⊞ 238
Above Info was Last Updated on 03.07.2022 (02:43:06)
Above Info was First Seen 10.05.2010
Type/Category of Info:
Industrial/Construction NotesInfo Source From:
Mining Reporter. Volume: 56 [LVI], Issue No. 4Info Publication Date:
July 25, 1907Info found on page:
84Info Title:
Dunlap Ore and Clay Screen Help Treating Cripple Creek Ores C. M. Hampson, Denver, Colorado, reports an increased sale of the Dunlap Ore and Clay Screen, for which he is western sales-agent.
Six screens lately installed at the Portland mill at Colorado Springs, as well as those put in at the Hewitt plant, Colorado City, and the Union mill at Florence, are reported to be giving much satisfaction. Since the installation of these screens at the Portland plant the dryers have been dispensed with.
Eight twelve-ft. Dunlaps have lately been ordered for the Standard plant at Colorado City.
Six screens lately installed at the Portland mill at Colorado Springs, as well as those put in at the Hewitt plant, Colorado City, and the Union mill at Florence, are reported to be giving much satisfaction. Since the installation of these screens at the Portland plant the dryers have been dispensed with. Eight twelve-ft. Dunlaps have lately been ordered for the Standard plant at Colorado City.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 84
- Hathi Trust Digital Library: ⊞ Mining Reporter; Volume 56, No. 4
- Hathi Trust Digital Library: ⊞ Mining Reporter; Volume 56 - Jul.-Dec. 1907
Above Info was Last Updated on 19.07.2022 (20:14:12)
Above Info was First Seen 19.07.2022
Type/Category of Info:
General Mining NewsInfo Source From:
The Western Investors Review. Volume: 14 [XIV], Issue No. 2Info Publication Date:
July 1907Info found on page:
12Info Title:
Portland Mill June 1907 Output During June the Portland plant processed 8,700 tons with an average value of $25.00 and a bullion value of $217,500.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 12
- Hathi Trust Digital Library: ⊞ The Western Investors Review, Vol.14 (July 1907-May 1908)
Above Info was Last Updated on 14.08.2023 (20:43:15)
Above Info was First Seen 14.08.2023
Type/Category of Info:
Special/Editorial CorrespondenceInfo Source From:
The Mining and Scientific Press. Volume: 94 [XCIV], Issue No. 18Info Publication Date:
May 4, 1907Info found on page:
558Info Title:
Portland Mill New Tailing Plant is Satisfactory Recent progress at Cripple Creek includes the new tailing-plant of the Portland Gold Mining Co. which is in full operation, and yielding satisfactory results.
Notes/Text been Edited:
Abstracted and slightly rewritten from source text.Above Info was Last Updated on 10.10.2021 (18:51:24)
Above Info was First Seen 24.05.2021
Type/Category of Info:
General Mining NewsInfo Source From:
The Mining World. Volume: 26 [XXVI], Issue No. 18Info Publication Date:
May 4, 1907Info found on page:
577Info Title:
Joe Dandy High Grade Shipment to Portland Mill Cripple Creek.—Another shipment of high grade has been sent to the Portland mill from the Jo Dandy. It is estimated to run better than 4 ounces.
Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 577
- Hathi Trust Digital Library: ⊞ The Mining World, Vol. 26 (January-June 1907)
Above Info was Last Updated on 19.11.2023 (16:24:44)
Above Info was First Seen 19.11.2023
Type/Category of Info:
Special/Editorial CorrespondenceInfo Source From:
The Mining and Scientific Press. Volume: 94 [XCIV], Issue No. 17Info Publication Date:
April 27, 1907Info found on page:
526Info Title:
Clara D. Ore Might Go to Portland Mill The Union Leasing Co. operating on the South Clara D. of the Lexington property is stated to have entered into negotiations with the management of the Portland mill at Colorado City for the treatment of about 50 tons of its ore per day. There are large quantities of ore that will run in the neighborhood of $10 per ton in the lower levels of the mine, the width of the orebody ranging from 15 to 20 ft.
A trial shipment to the mill has given satisfactory results.
A trial shipment to the mill has given satisfactory results.Above Info was Last Updated on 10.10.2021 (18:51:24)
Above Info was First Seen 24.05.2021
Type/Category of Info:
Special/Editorial CorrespondenceInfo Source From:
The Mining and Scientific Press. Volume: 94 [XCIV], Issue No. 15Info Publication Date:
April 13, 1907Info found on page:
456Info Title:
Portland Mill Cyanide Tailing Plant Expected Ready It is expected that the new cyanide tailing plant of the Portland mill at Colorado City will be ready for operation in April. The plant will have a capacity of 300 tons per day, treating the enormous dump accumulated from the chlorination mill. A belt-conveyor will be used to transmit the tailing from the dump to the mill.
Above Info was Last Updated on 10.10.2021 (18:51:24)
Above Info was First Seen 23.05.2021
Type/Category of Info:
General Mining NewsInfo Source From:
The Mining World. Volume: 26 [XXVI], Issue No. 13Info Publication Date:
March 30, 1907Info found on page:
430Info Title:
Findley Con. Ships an Average of 100 Tons Daily to Portland Mill Cripple Creek.—The Findley Con. working in the richest territory on Bull hill is shipping an average of 100 tons daily to the Portland mill near Colorado Springs.
Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 430
- Hathi Trust Digital Library: ⊞ The Mining World, Vol. 26 (January-June 1907)
Above Info was Last Updated on 15.11.2023 (10:03:24)
Above Info was First Seen 15.11.2023
Type/Category of Info:
General Mining NewsInfo Source From:
The Mining and Scientific Press. Volume: 94 [XCIV], Issue No. 12Info Publication Date:
March 23, 1907Info found on page:
357Info Title:
Economic Mill Machinery Sold to Portland Gold Mining Co. Cripple Creek, March 18. (Special Correspondence)—Some of the slightly damaged machinery of the Economic mill, situated in Eclipse gulch, which was burned some weeks ago, has been sold to the Portland Gold Mining Co. It will be used in the new cyanide plant being constructed at Colorado City for the treatment of the tailing from the Portland mill.
Above Info was Last Updated on 16.07.2022 (20:32:09)
Above Info was First Seen 22.05.2021
Type/Category of Info:
General Mining NewsInfo Source From:
The Mining World. Volume: 26 [XXVI], Issue No. 12Info Publication Date:
March 23, 1907Info found on page:
399Info Title:
Findley Con. Co. Outputs 100 Tons Daily, Mostly to Portland Mill Denver.—The Findley Con., operating the Findley and Shurtloff on Bull hill, is shipping 100 tons daily; contents 2 to 2¼ ounces. The larger proportion of the ore is being treated at the Portland mill near Colorado Springs.
Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 399
- Hathi Trust Digital Library: ⊞ The Mining World, Vol. 26 (January-June 1907)
Above Info was Last Updated on 14.11.2023 (08:41:31)
Above Info was First Seen 14.11.2023
Type/Category of Info:
General Mining NewsInfo Source From:
Eagle County Blade. Volume: 13 [XIII], Issue No. 38Info Publication Date:
March 21, 1907Info found on page:
4Info Title:
Portland Mill Workings The Portland mill is treating a large quantity of custom ore, which keeps that plant running to its full capacity, while the company is doing work on the mine.
Notes/Text been Edited:
Abstracted from source text.Internet Source Text Link(s) {Found/Seen/Known]:
- Colorado Historic Newspaper Collection: ⊞ The Eagle County Blade, March 21, 1907
Above Info was Last Updated on 10.10.2021 (18:51:24)
Above Info was First Seen 16.01.2021
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Reporter. Volume: 55 [LV], Issue No. 12Info Publication Date:
March 21, 1907Info found on page:
277Info Title:
Portland Mill's Cyanide Tailings Plant Completed The Portland Company's new 300-ton capacity cyanide tailings' plant at West Colorado Springs has been completed, and is probably now in operation.
Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 277
- Hathi Trust Digital Library: ⊞ Mining Reporter; Volume 55 - Jan.-Jun. 1907
Above Info was Last Updated on 11.07.2022 (17:39:19)
Above Info was First Seen 06.06.2010
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Reporter. Volume: 55 [LV], Issue No. 10Info Publication Date:
March 7, 1907Info found on page:
228Info Title:
Portland Mill February Output The Portland reduction plant treated during February 9,200 tons of Cripple Creek ore.
Notes/Text been Edited:
Abstracted and slightly rewritten from source text.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 228
- Hathi Trust Digital Library: ⊞ Mining Reporter; Volume 55 - Jan.-Jun. 1907
Above Info was Last Updated on 11.07.2022 (07:58:39)
Above Info was First Seen 06.06.2010
Type/Category of Info:
Special/Editorial CorrespondenceInfo Source From:
The Mining and Scientific Press. Volume: 94 [XCIV], Issue No. 7Info Publication Date:
February 16, 1907Info found on page:
206Info Title:
Portland Mill Completed a Cyanide PlantDenver, Colorado.
Competition Between Cyanidation and Chlorination.
With the 16% reduction in the output for 1906 for the Cripple Creek District, compared with that of 1905, has come a corresponding pressure for the reduction of treatment charges. Cyanidation has locked horns with chlorination in what promises to be a death struggle and all who are interested are anxiously awaiting the outcome.
The Portland Gold Mining Co. is just completing a 400-ton plant for fine grinding in cyanide solution in tube-mills to treat the tailing that has been accumulating from its chlorination plant. This plant is supposed to contain $2.50 per ton, hence a handsome profit is expected. One tube-mill is lined with silex blocks and it is planned to line the other with cast-iron liners, which will furnish a useful comparison.
Altogether, it seems as though cyanidation were destined soon to triumph. Bromo-cyanidation will now have a fair chance, and it would not be strange if it were to make a better showing than it has in previous trials.
Competition Between Cyanidation and Chlorination. With the 16% reduction in the output for 1906 for the Cripple Creek District, compared with that of 1905, has come a corresponding pressure for the reduction of treatment charges. Cyanidation has locked horns with chlorination in what promises to be a death struggle and all who are interested are anxiously awaiting the outcome. The Portland Gold Mining Co. is just completing a 400-ton plant for fine grinding in cyanide solution in tube-mills to treat the tailing that has been accumulating from its chlorination plant. This plant is supposed to contain $2.50 per ton, hence a handsome profit is expected. One tube-mill is lined with silex blocks and it is planned to line the other with cast-iron liners, which will furnish a useful comparison. Altogether, it seems as though cyanidation were destined soon to triumph. Bromo-cyanidation will now have a fair chance, and it would not be strange if it were to make a better showing than it has in previous trials.Notes/Text been Edited:
Abstracted, restyled and slightly rewritten from source text.Above Info was Last Updated on 10.10.2021 (18:51:24)
Above Info was First Seen 21.05.2021
Type/Category of Info:
General Mining NewsInfo Source From:
The Mining World. Volume: 26 [XXVI], Issue No. 5Info Publication Date:
February 2, 1907Info found on page:
196Info Title:
Findlay Ships to Portland Mill at Rate of 75 Tons Daily Denver.—Ore is being shipped from the Findlay to the Portland mill at Colorado City at the rate of 75 tons per day, pending the completion of the Golden Cycle mill, which is expected to be ready for business on February 1.
Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 196
- Hathi Trust Digital Library: ⊞ The Mining World, Vol. 26 (January-June 1907)
Above Info was Last Updated on 11.11.2023 (16:02:48)
Above Info was First Seen 11.11.2023
Type/Category of Info:
Special/Editorial CorrespondenceInfo Source From:
The Mining and Scientific Press. Volume: 94 [XCIV], Issue No. 4Info Publication Date:
January 26, 1907Info found on page:
106Info Title:
Findley Strike to Be Sent to Portland MillCripple Creek, Colorado.
Strike in the Findley.
A strike of good ore is reported to have been made on the Findley mine on Bull hill. At a depth of 850 ft. on the tenth level a new vein has been encountered and from the assay-returns the ore should ship between two and three ounces.
The Findley ore is to be treated at the Portland mill at Colorado City until such time as the Golden Cycle is in operation. This will be the first custom ore the Portland mill will have treated.
Strike in the Findley. A strike of good ore is reported to have been made on the Findley mine on Bull hill. At a depth of 850 ft. on the tenth level a new vein has been encountered and from the assay-returns the ore should ship between two and three ounces. The Findley ore is to be treated at the Portland mill at Colorado City until such time as the Golden Cycle is in operation. This will be the first custom ore the Portland mill will have treated.Above Info was Last Updated on 10.10.2021 (18:51:24)
Above Info was First Seen 20.05.2021
Type/Category of Info:
General Mining NewsInfo Source From:
The Mining World. Volume: 26 [XXVI], Issue No. 4Info Publication Date:
January 26, 1907Info found on page:
132Info Title:
Portland Will Transfer to Cyanide The manager of the great Portland mine also has rejected chlorination for cyaniding. The plant established at the mill will treat tailings only for a time—the waste from its chlorination process.
Another plant of larger dimensions will probably be built at the Portland mine for the express purpose of handling the enormous quantities of low grade $5 to $20 stuff left in the upper workings.
Another plant of larger dimensions will probably be built at the Portland mine for the express purpose of handling the enormous quantities of low grade $5 to $20 stuff left in the upper workings.Notes/Text been Edited:
AbstractedInternet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 132
- Hathi Trust Digital Library: ⊞ The Mining World, Vol. 26 (January-June 1907)
Above Info was Last Updated on 11.11.2023 (09:06:38)
Above Info was First Seen 11.11.2023
Type/Category of Info:
General Mining NewsInfo Source From:
The Mining World. Volume: 25 [XXV], Issue No. 23Info Publication Date:
December 8, 1906Info found on page:
700Info Title:
Portland Mill November 1906 Output During November the Portland plant processed 8,750 tons with an average value of $26.00 and a bullion value of $227,500.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 700
- Hathi Trust Digital Library: ⊞ The Mining World, Vol. 25 (July-December 1906)
Above Info was Last Updated on 09.11.2023 (13:44:45)
Above Info was First Seen 09.11.2023
Type/Category of Info:
General Mining NewsInfo Source From:
The Mining World. Volume: 25 [XXV], Issue No. 20Info Publication Date:
November 17, 1906Info found on page:
610Info Title:
Portland Mill October 1906 Output During October the Portland plant processed 9,000 tons with an average value of $26 and a bullion value of $234,000.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 610
- Hathi Trust Digital Library: ⊞ The Mining World, Vol. 25 (July-December 1906)
Above Info was Last Updated on 07.11.2023 (09:54:18)
Above Info was First Seen 07.11.2023
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Reporter. Volume: 54 [LIV], Issue No. 16Info Publication Date:
October 18, 1906Info found on page:
400Info Title:
Portland Mill to Get Cyanide Plant Portland.—The announcement has been made that as a result of experiments with the cyanide process, plans will be drawn for the erection of a cyanide plant at Colorado Springs. It is the expectation to have it in operation by April 1, 1907.
Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 400
- Hathi Trust Digital Library: ⊞ Mining Reporter; Volume 54; July to December 1906
Above Info was Last Updated on 27.02.2023 (10:30:20)
Above Info was First Seen 27.02.2023
Type/Category of Info:
General Mining NewsInfo Source From:
The Mining World. Volume: 24 [XXIV], Issue No. 23Info Publication Date:
June 9, 1906Info found on page:
703Info Title:
Portland Mill May 1906 Output During May the Portland plant processed 10,000 tons with an average value of $26.00 and a bullion value of $260,000.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 703
- Hathi Trust Digital Library: ⊞ The Mining World, Vol. 24 (January-June 1906)
Above Info was Last Updated on 01.11.2023 (14:29:13)
Above Info was First Seen 01.11.2023
Type/Category of Info:
ArticleInfo Source From:
Eagle Valley Enterprise. Volume: 9 [IX], Issue No. 30Info Publication Date:
June 8, 1906Info found on page:
5Info Title:
Portland Mill, Colorado City May Production During May the output of the Portland mill was 10,000 tons of average value $26.00 for a total of $260,000
Notes/Text been Edited:
Abstracted and partly rewritten from source text.Internet Source Text Link(s) {Found/Seen/Known]:
- Colorado Historic Newspaper Collection: ⊞ Eagle Valley Enterprise, June 8, 1906
Above Info was Last Updated on 10.10.2021 (18:51:24)
Above Info was First Seen 02.11.2020
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Reporter. Volume: 52 [LII], Issue No. 1Info Publication Date:
July 6, 1905Info found on page:
16Info Title:
Portland Mill, Colorado City Production; June 1905 The Portland Mill treated during June 7,500 tons with an average value of $28.00 for a total of $210,000.
Notes/Text been Edited:
Abstracted and partly rewritten from source text.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library: ⊞ Link to Page
Above Info was Last Updated on 22.02.2022 (23:23:48)
Above Info was First Seen 03.05.2010
Type/Category of Info:
General Mining NewsInfo Source From:
PROFITS; A Journal of Finance and Mining Worth While. Volume: 4 [IV], Issue No. 46Info Publication Date:
February 11, 1905Info found on page:
2Info Title:
Portland Mill January 1905 Output During January the Portland plant processed 8,500 tons with an average value of $30 and a bullion value of $255,000.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 2
- Hathi Trust Digital Library: ⊞ PROFITS, Volume 4 (April 1904-March 1905)
Above Info was Last Updated on 10.10.2023 (09:15:16)
Above Info was First Seen 10.10.2023
Type/Category of Info:
General Mining NewsInfo Source From:
PROFITS; A Journal of Finance and Mining Worth While. Volume: 4 [IV], Issue No. 40Info Publication Date:
December 31, 1904Info found on page:
2Info Title:
Portland Mine in 1904 Banner Month Colorado Springs, Dec. 26.—From reliable sources it is learned that December will be the banner month of the year as far as tonnage and value is concerned of the great Portland Mine on Battle Mountain.
Not only is this company sending out its usual quota, between 8000 and 9000 tons of $30 ore, which goes to their own mill, but they will send from 6000 to 8000 tons to the smelters, which should average around $60 to the ton.
In addition to this it is estimated that the different lessees operating the large dump from this property will produce more than 3000 tons of ore, which should average $15 to the ton, and, taking the facts in consideration, besides the usual December output, when every one tries to increase the tonnage to the utmost capacity, it is safe to predict that the output for the month will be very close to the two and a quarter million mark.
Not only is this company sending out its usual quota, between 8000 and 9000 tons of $30 ore, which goes to their own mill, but they will send from 6000 to 8000 tons to the smelters, which should average around $60 to the ton. In addition to this it is estimated that the different lessees operating the large dump from this property will produce more than 3000 tons of ore, which should average $15 to the ton, and, taking the facts in consideration, besides the usual December output, when every one tries to increase the tonnage to the utmost capacity, it is safe to predict that the output for the month will be very close to the two and a quarter million mark.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 2
- Hathi Trust Digital Library: ⊞ PROFITS, Volume 4 (April 1904-March 1905)
Above Info was Last Updated on 07.10.2023 (19:50:48)
Above Info was First Seen 07.10.2023
Type/Category of Info:
General Mining NewsInfo Source From:
PROFITS; A Journal of Finance and Mining Worth While. Volume: 4 [IV], Issue No. 33Info Publication Date:
November 12, 1904Info found on page:
5Info Title:
Portland Mill October 1904 Output During October the Portland plant processed 7,750 tons with an average value of $30 and a bullion value of $232,500.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 5
- Hathi Trust Digital Library: ⊞ PROFITS, Volume 4 (April 1904-March 1905)
Above Info was Last Updated on 01.10.2023 (09:28:31)
Above Info was First Seen 01.10.2023
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Reporter. Volume: 50 [L], Issue No. 19Info Publication Date:
November 10, 1904Info found on page:
508Info Title:
Portland Mill October Output The October output of the Portland mill was 7,750 tons at an average value of $30 for a total of $232,500.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 508
- Hathi Trust Digital Library: ⊞ Mining Reporter 1904 (Jul-Dec)
Above Info was Last Updated on 05.10.2022 (08:10:19)
Above Info was First Seen 16.05.2010
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Reporter. Volume: 50 [L], Issue No. 14Info Publication Date:
October 6, 1904Info found on page:
368Info Title:
Portland Mill September Output The September output of the Portland mill was 7,500 tons at an average value of $30 for a total of $225,000.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 368
- Hathi Trust Digital Library: ⊞ Mining Reporter 1904 (Jul-Dec)
Above Info was Last Updated on 03.10.2022 (10:18:36)
Above Info was First Seen 01.04.2011
Type/Category of Info:
PersonalsInfo Source From:
Mining Reporter. Volume: 50 [L], Issue No. 7Info Publication Date:
August 18, 1904Info found on page:
169Info Title:
Mr. J. B. Daniels Been Appointed Superintendent J. B. Daniels has been appointed superintendent of the Portland mill at Colorado City, Colorado, to succeed Alfred E. Johnson.
Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 169
- Hathi Trust Digital Library: ⊞ Mining Reporter 1904 (Jul-Dec)
Above Info was Last Updated on 26.09.2022 (07:53:08)
Above Info was First Seen 26.09.2022
Type/Category of Info:
General Mining NewsInfo Source From:
PROFITS; A Journal of Finance and Mining Worth While. Volume: 4 [IV], Issue No. 18Info Publication Date:
July 30, 1904Info found on page:
4Info Title:
Portland Mill to Resume Treatment The Portland Co. mill at Colorado City has been undergoing repairs, but is to resume this week, according to reports here. Mill is treating the bulk of the Portland mine's output of 325 tons a day, approximately 10,000 tons a month, of a gross bullion value of over $300,000.
Notes/Text been Edited:
Abstracted and slightly rewritten from source text.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 4
- Hathi Trust Digital Library: ⊞ PROFITS, Volume 4 (April 1904-March 1905)
Above Info was Last Updated on 22.09.2023 (07:45:48)
Above Info was First Seen 22.09.2023
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Reporter. Volume: 50 [L], Issue No. 1Info Publication Date:
July 7, 1904Info found on page:
18Info Title:
Portland Mill June Output The June output of the Portland mill was 6,500 tons at an average value of $30 for a total of $195,000.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 18
- Hathi Trust Digital Library: ⊞ Mining Reporter 1904 (Jul-Dec)
Above Info was Last Updated on 19.09.2022 (09:25:46)
Above Info was First Seen 14.05.2010
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Reporter. Volume: 49 [XLIX], Issue No. 23Info Publication Date:
June 9, 1904Info found on page:
592Info Title:
Portland Mill May Output The May output of the Portland mill was 8,000 tons at an average value of $30 for a total of $240,000.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 592
- Hathi Trust Digital Library: ⊞ Mining Reporter 1904 (Jan-Jun)
Above Info was Last Updated on 15.09.2022 (14:35:37)
Above Info was First Seen 15.09.2022
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Reporter. Volume: 49 [XLIX], Issue No. 21Info Publication Date:
May 26, 1904Info found on page:
539Info Title:
Portland Mill Happenings Portland Gold Mining Co.—This company has a 300-ton mill with concrete floors throughout. They are well equipped with machine shops, making their own patterns for casting and manufacturing their machinery, outside of castings.
Three precipitating tanks have recently been installed in a separate building, each tank upon a rock foundation of its own. This is more satisfactory, as in the old way the vibrations of the mill hindered the gold sulphides settling. Each tank holds eighty-five tons. The company has provided for any leakage by installing an inclined concrete floor.
A new method of determining the amount of dust in the rolls is being used. Instead of the men sifting through the sieves up to the 150-mesh, they now have an upright rectangular box through the top of which runs a 2½-inch pipe, connected to a fan above, so that a steady suction goes through the box. Through a spout the pulp is poured into the box, which falls over a ledge to an inclined board below, and from there to the pan. Thus it passes twice in a thin sheet through the current. By weighing the pulp before and after, the difference gives the dust. This only takes about one minute for the whole operation.
Superintendent Johnson has installed a new system of grates to allow of more perfect control of combustion. The grates are of individual pieces, having a pipe for cold water running through their center. The effect of cold water in the grates is such that it enables the cinders to be sufficiently cooled so that there is no tendency to warp or distort them nor the sealed door of the ash pit. Air is forced below the grate by a steam injector.
Your correspondent saw a grate which had been removed that had been in use for a year. It appeared no worse than if used but two weeks. These individual shake grates allow the entire product of cinders and ashes to be discharged without the necessity of any manipulations from above. A fan forces cold air between the two walls of the fire box, emptying it into the arch, thus keeping the outer wall very cool. Lignite coal is being used. All the nuts used are cast with two crevices on opposite sides, so that if the heat causes them to stick they can be easily broken.
Superintendent Johnson has also just completed a device to tell the heat of the ores in the roaster by optical comparison, a scale on the outside giving the degrees of heat. A person may read the temperature of the ore in any part of the furnace.
Rabbles are used for the roasters that run in a half circle about the rabble arm, and are fastened to it by pins on the upper part of the arm projecting through the rabble eye. These are easily removed while hot by a pair of tongs.
The filter in the barrels consists of lead boxes having 4-inch holes in the top and bottom, the box being filled with crushed quartz. The solution filters through this to the trough on the underside. The quartz and slime can be easily removed.
Three precipitating tanks have recently been installed in a separate building, each tank upon a rock foundation of its own. This is more satisfactory, as in the old way the vibrations of the mill hindered the gold sulphides settling. Each tank holds eighty-five tons. The company has provided for any leakage by installing an inclined concrete floor. A new method of determining the amount of dust in the rolls is being used. Instead of the men sifting through the sieves up to the 150-mesh, they now have an upright rectangular box through the top of which runs a 2½-inch pipe, connected to a fan above, so that a steady suction goes through the box. Through a spout the pulp is poured into the box, which falls over a ledge to an inclined board below, and from there to the pan. Thus it passes twice in a thin sheet through the current. By weighing the pulp before and after, the difference gives the dust. This only takes about one minute for the whole operation. Superintendent Johnson has installed a new system of grates to allow of more perfect control of combustion. The grates are of individual pieces, having a pipe for cold water running through their center. The effect of cold water in the grates is such that it enables the cinders to be sufficiently cooled so that there is no tendency to warp or distort them nor the sealed door of the ash pit. Air is forced below the grate by a steam injector. Your correspondent saw a grate which had been removed that had been in use for a year. It appeared no worse than if used but two weeks. These individual shake grates allow the entire product of cinders and ashes to be discharged without the necessity of any manipulations from above. A fan forces cold air between the two walls of the fire box, emptying it into the arch, thus keeping the outer wall very cool. Lignite coal is being used. All the nuts used are cast with two crevices on opposite sides, so that if the heat causes them to stick they can be easily broken. Superintendent Johnson has also just completed a device to tell the heat of the ores in the roaster by optical comparison, a scale on the outside giving the degrees of heat. A person may read the temperature of the ore in any part of the furnace. Rabbles are used for the roasters that run in a half circle about the rabble arm, and are fastened to it by pins on the upper part of the arm projecting through the rabble eye. These are easily removed while hot by a pair of tongs. The filter in the barrels consists of lead boxes having 4-inch holes in the top and bottom, the box being filled with crushed quartz. The solution filters through this to the trough on the underside. The quartz and slime can be easily removed.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 539
- Hathi Trust Digital Library: ⊞ Mining Reporter 1904 (Jan-Jun)
Above Info was Last Updated on 10.09.2022 (08:24:54)
Above Info was First Seen 10.09.2022
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Reporter. Volume: 49 [XLIX], Issue No. 18Info Publication Date:
May 5, 1904Info found on page:
463Info Title:
Portland Mill April Output The April output of the Portland mill was 9,000 tons at an average value of $28 for a total of $252,000.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 463
- Hathi Trust Digital Library: ⊞ Mining Reporter 1904 (Jan-Jun)
Above Info was Last Updated on 07.09.2022 (07:46:31)
Above Info was First Seen 07.09.2022
Type/Category of Info:
Industrial/Construction NotesInfo Source From:
The Engineering and Mining Journal. Volume: 77 [LXXVII], Issue No. 14Info Publication Date:
April 7, 1904Info found on page:
577Info Title:
Portland Mill's Holthoff Roasting Furnace The Power & Mining Machinery Co. of Cudahy, Wis., has installed a 100-ton Holthoff revolving hearth roasting furnace in the Portland mill near Colorado Springs, Colo.
Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library: ⊞ Direct to Page 577
Above Info was Last Updated on 30.10.2020 (11:04:30)
Above Info was First Seen 17.03.2019
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Reporter. Volume: 49 [XLIX], Issue No. 14Info Publication Date:
April 7, 1904Info found on page:
358Info Title:
Portland Mill March Output The March output of the Portland mill was 8,000 tons at an average value of $30.00 for a total of $240,000.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 358
- Hathi Trust Digital Library: ⊞ Mining Reporter 1904 (Jan-Jun)
Above Info was Last Updated on 03.09.2022 (10:59:00)
Above Info was First Seen 03.09.2022
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Reporter. Volume: 49 [XLIX], Issue No. 10Info Publication Date:
March 10, 1904Info found on page:
253Info Title:
Portland Mill February Output The February output of the Portland mill was 8,300 tons at an average value of $30 for a total of $249,000.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 253
- Hathi Trust Digital Library: ⊞ Mining Reporter 1904 (Jan-Jun)
Above Info was Last Updated on 30.08.2022 (09:12:53)
Above Info was First Seen 30.08.2022
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Reporter. Volume: 49 [XLIX], Issue No. 8Info Publication Date:
February 25, 1904Info found on page:
202Info Title:
Portland Mill & Mine Happenings Portland.—The mill of this property is treating about 300 tons of ore daily. There is also a considerable amount of high-grade ore being shipped. According to President Burns, it is estimated that the mine will this year produce $500,000 in excess of the production for the past year.
Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 202
- Hathi Trust Digital Library: ⊞ Mining Reporter 1904 (Jan-Jun)
Above Info was Last Updated on 29.08.2022 (09:00:21)
Above Info was First Seen 29.08.2022
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Reporter. Volume: 49 [XLIX], Issue No. 6Info Publication Date:
February 11, 1904Info found on page:
148Info Title:
Portland Mill January Output The January output of the Portland mill was 8,500 tons at an average value of $30 for a total of $255,000.
Notes/Text been Edited:
Abstracted from source text in table and restyled/written to sentence form.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 148
- Hathi Trust Digital Library: ⊞ Mining Reporter 1904 (Jan-Jun)
Above Info was Last Updated on 27.08.2022 (09:55:45)
Above Info was First Seen 27.08.2022
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Reporter. Volume: 49 [XLIX], Issue No. 1Info Publication Date:
January 7, 1904Info found on page:
19Info Title:
Portland Mill 1903 Production During 1903 the ore tonnage handled by the Portland mill was 93,275 tons.
Notes/Text been Edited:
Abstracted and partly rewritten from source text.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 19
- Hathi Trust Digital Library: ⊞ Mining Reporter 1904 (Jan-Jun)
Above Info was Last Updated on 23.08.2022 (23:39:54)
Above Info was First Seen 23.08.2022
Type/Category of Info:
General Mining NewsInfo Source From:
Mining Reporter. Volume: 49 [XLIX], Issue No. 1Info Publication Date:
January 7, 1904Info found on page:
19Info Title:
Portland Mill December Ore Treatment The Portland mill at Colorado City handled 10,200 tons in December.
Notes/Text been Edited:
Abstracted and slightly rewritten from source text.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 19
- Hathi Trust Digital Library: ⊞ Mining Reporter 1904 (Jan-Jun)
Above Info was Last Updated on 24.08.2022 (22:04:36)
Above Info was First Seen 23.08.2022
Type/Category of Info:
General Mining NewsInfo Source From:
PROFITS; A Journal of Finance and Mining Worth While. Volume: 3 [III], Issue No. 12Info Publication Date:
June 20, 1903Info found on page:
2Info Title:
Portland Mill to Be Expanded Plans have been drawn and contracts let for a 100 ton addition to the roasters of the Portland mill at Colorado City. The contracts for the structural iron work has been let in the east and the manufacture of these parts will be rushed. The addition will give the Portland mill a roasting capacity of 350 tons a day.
Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library; Link to Page: ⊞ 2
- Hathi Trust Digital Library: ⊞ PROFITS, Volume 3 (April 1903-March 1904)
Above Info was Last Updated on 27.08.2023 (09:03:01)
Above Info was First Seen 27.08.2023
Type/Category of Info:
General Mining NewsInfo Source From:
The Engineering and Mining Journal. Volume: 75 [LXXV], Issue No. 21Info Publication Date:
May 23, 1903Info found on page:
797Info Title:
Stearns-Rogers Manufacturing Co. Suit Against Portland Gold Mining Co. Portland Gold Mining Company.—The Stearns-Rogers Manufacturing Company has brought suit against this company in the United States Circuit Court to collect $54,045.67 alleged to be due on construction of the Portland chlorination mill. The money is alleged to be due on several contracts. A part of each of the total amounts has been paid, but the complaint states that a part of each yet remains unpaid and uncollected.
The manufacturers were to furnish the plans, provide a superintendent for construction and to furnish certain parts of the material used. For the furnishing of plans and supervising of construction the manufacturing company was to get a certain per cent of the total cost. The entire works are alleged to have cost about $700,000, the manufacturing company furnishing about $112,772 of one kind of material and $52,383 of another kind. There is charged to be due $24,991 of the percentage for plans and construction, the balance of the amount sued for being on the material furnished.
The objection of the Portland Company to paying the claim, has not been made public, though it is understood to be faulty construction of the mill and non-fulfillment of contract.
The manufacturers were to furnish the plans, provide a superintendent for construction and to furnish certain parts of the material used. For the furnishing of plans and supervising of construction the manufacturing company was to get a certain per cent of the total cost. The entire works are alleged to have cost about $700,000, the manufacturing company furnishing about $112,772 of one kind of material and $52,383 of another kind. There is charged to be due $24,991 of the percentage for plans and construction, the balance of the amount sued for being on the material furnished. The objection of the Portland Company to paying the claim, has not been made public, though it is understood to be faulty construction of the mill and non-fulfillment of contract.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library: ⊞ Direct to Page 797
Above Info was Last Updated on 30.10.2020 (11:04:30)
Above Info was First Seen 21.04.2019
Type/Category of Info:
General Mining NewsInfo Source From:
The Engineering and Mining Journal. Volume: 75 [LXXV], Issue No. 17Info Publication Date:
April 25, 1903Info found on page:
646Info Title:
Portland Mill to Treat Full Dump of an Old Portland Shaft Portland Gold Mining Company.—One of the dumps of one of the old shafts is being shipped bodily to the mill at Colorado City.
Notes/Text been Edited:
Abstracted from a somewhat longer text about the Portland CompanyInternet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library: ⊞ Direct to Page 646
Above Info was Last Updated on 30.10.2020 (11:04:30)
Above Info was First Seen 18.04.2019
Type/Category of Info:
General Mining NewsInfo Source From:
The Engineering and Mining Journal. Volume: 75 [LXXV], Issue No. 16Info Publication Date:
April 18, 1903Info found on page:
610Info Title:
Portland Mill The mill is said to be doing very well, and everything is in good condition.
Notes/Text been Edited:
Abstracted from info about their dividend payment.Above Info was Last Updated on 30.10.2020 (11:04:30)
Above Info was First Seen 02.02.2019
Type/Category of Info:
General Mining NewsInfo Source From:
The Engineering and Mining Journal. Volume: 75 [LXXV], Issue No. 11Info Publication Date:
March 14, 1903Info found on page:
423Info Title:
Colorado City Mills Runs Protected The Standard and Portland mills at Colorado City are running under the protection of troops. The refusal of the Cripple Creek mine owners to stop shipping ore to the mills will doubtless result in a miners' strike unless it happens that the unions of Cripple Creek will refuse to recognize the authority of the Western Federation of miners and stick to their work. It is generally admitted that this strike is a fight to a finish between the Western Federation of Miners and the mine owners, and mill operators of Colorado, and that the struggle has but started.
Notes/Text been Edited:
Restructured the text about the Millmen's StrikeInternet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library: ⊞ Direct to Page 423
Above Info was Last Updated on 30.10.2020 (11:04:30)
Above Info was First Seen 06.02.2019
Type/Category of Info:
General Mining NewsInfo Source From:
The Engineering and Mining Journal. Volume: 75 [LXXV], Issue No. 10Info Publication Date:
March 7, 1903Info found on page:
384Info Title:
Millmen's Strike Effect on Colorado City Mills The Mill and Smelter Men's Union has voted to extend the strike at the Standard Mill in Colorado City to the Telluride and Portland mills. The Portland Mine may have to close. The Telluride and Portland managers refused to advance wages.
The Standard Mill, where the strike began, is still running with non-union men, who lodge in the mill buildings.
The Standard Mill, where the strike began, is still running with non-union men, who lodge in the mill buildings.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library: ⊞ Direct to Page 384
Above Info was Last Updated on 30.10.2020 (11:04:30)
Above Info was First Seen 06.04.2019
Type/Category of Info:
General Mining NewsInfo Source From:
The Engineering and Mining Journal. Volume: 75 [LXXV], Issue No. 8Info Publication Date:
February 21, 1903Info found on page:
310Info Title:
Portland Mill in Colorado City Generated Savings Portland Gold Mining Company— The annual report is very elaborate, and shows the company to be in good shape financially with good ore reserves. The new mill at Colorado City has saved the company about $1.60 per ton on the 40,000 or more tons handled during the time it has been running, making in all about $60,000.
Notes/Text been Edited:
Abstracted and restructured, partly rewritten, from a larger text about the company and its affairs.Internet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library: ⊞ Direct to Page 310
Above Info was Last Updated on 30.10.2020 (11:04:30)
Above Info was First Seen 31.03.2019
Type/Category of Info:
ArticleInfo Source From:
The Cripple Creek Times. Issue No. 1Info Publication Date:
January 1, 1903Info found on page:
7Info Title:
Portland Mill Production 1902 During 1902 the Portland Reduction Plant at Colorado City handled 41,500 tons of ore at a value of $ 1,225,000.
Notes/Text been Edited:
Abstracted, restyled and rewritten from source text.Internet Source Text Link(s) {Found/Seen/Known]:
- Internet Archive: ⊞ The Cripple Creek Times (New Year 1903)
Above Info was Last Updated on 11.10.2021 (21:12:43)
Above Info was First Seen 09.09.2021
Type/Category of Info:
ArticleInfo Source From:
The Mineral Industry, Its Statistics, Technology & Trade in the U.S. and Other Countries. Volume: 10 [X]Info Publication Date:
September 1902Info found on page:
297Info Title:
Portland Mill Expected to Be in Operation Before Middle of 1902 The new chlorination mill now building for the Portland Co., at Cripple Creek, is expected to be in operation before the middle of 1902. The mill will contain heavier crushing machinery than usual, three 60-ft. diameter Pearce turret furnaces—the largest ever built and twelve 10-ton chlorination barrels; all buildings are steel construction, and the capacity of the plant will range from 450 to 500 tons per day.
Notes/Text been Edited:
AbstractedInternet Source Text Link(s) {Found/Seen/Known]:
- Hathi Trust Digital Library: ⊞ Link to Page
- Hathi Trust Digital Library: ⊞ The Mineral industry. v.10 1901.
Above Info was Last Updated on 21.05.2022 (09:43:54)
Above Info was First Seen 21.05.2022
Type/Category of Info:
ArticleInfo Source From:
The Short Line Blue Book. Volume: 2 [II], Issue No. 1Info Publication Date:
April 1902Info found on page:
10Info Title:
Chlorination Mill of Portland Co. Will Opened About May 15 The new chlorination mill of the Portland Company will be opened about May 15. It was built at Colorado Springs by the Portland M. & M. Company and will have a capacity of 300 tons a day. This can be increased, however, should the output of the mine warrant it.
The opening of this mill is an event of great importance in the mining world. The fact that it is built to handle the output of the Portland mine alone is a striking proof of the greatness of that property, and its completion makes the company entirely independent of the smelters.
The new industry will give employment to a large number of Colorado Springs workmen.
The opening of this mill is an event of great importance in the mining world. The fact that it is built to handle the output of the Portland mine alone is a striking proof of the greatness of that property, and its completion makes the company entirely independent of the smelters. The new industry will give employment to a large number of Colorado Springs workmen.Above Info was Last Updated on 10.10.2021 (18:51:24)
Above Info was First Seen 28.08.2021
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All copying, hot linking, Whatever, should be sought permission for, Before doing it!
If you see something that should not be here, is wrongly marked, or have anything to add, please write me.