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A platform for research: civil engineering, architecture and urbanism
Dredging methods and costs of ross island sand and gravel Co, Portland, Ore
Deposit covers 385 acres; details of dredge 100 ft long 30 ft wide 5 ft deep, carrying 80 ft ladder; 12 in. dredge pump direct connected to 250 hp, 2300 volt 3-phase, 60-cycle variable speed motor; discharge pipe line, connected by rubber sleeves; hoisting; screening; 1800 ft aerial tramway; stock piles; crushing plant for material over 2 3/4 in.; auxiliary equipment; cost data.
Dredging methods and costs of ross island sand and gravel Co, Portland, Ore
Deposit covers 385 acres; details of dredge 100 ft long 30 ft wide 5 ft deep, carrying 80 ft ladder; 12 in. dredge pump direct connected to 250 hp, 2300 volt 3-phase, 60-cycle variable speed motor; discharge pipe line, connected by rubber sleeves; hoisting; screening; 1800 ft aerial tramway; stock piles; crushing plant for material over 2 3/4 in.; auxiliary equipment; cost data.
Dredging methods and costs of ross island sand and gravel Co, Portland, Ore
U S Bur Mines -- Information Cir
Perkins, O.E. (author)
1933
10 pages
Supp plates
Report
English
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