Electrical news and engineering . flume varying from 16 ft. x 13 16 ft. X 23 ft. The penstocks are of steel. 3/8-inch material, 33 feetlong, 10 foot diameter. There are two penstocks of this Two 1,500 Generators—Porcupine &c. This temporary power plant is the one that was de-stroyed by fire during the early summer. The sawmill wasalso destroyed almost before it had served the purpose forwhich it was constructed. In spite of these drawbacks how-ever, and with the snow 5 feet deep on the average andthe temperature down to 43° below zero, the power plantwas completed on schedule time,
Electrical news and engineering . flume varying from 16 ft. x 13 16 ft. X 23 ft. The penstocks are of steel. 3/8-inch material, 33 feetlong, 10 foot diameter. There are two penstocks of this Two 1,500 Generators—Porcupine &c. This temporary power plant is the one that was de-stroyed by fire during the early summer. The sawmill wasalso destroyed almost before it had served the purpose forwhich it was constructed. In spite of these drawbacks how-ever, and with the snow 5 feet deep on the average andthe temperature down to 43° below zero, the power plantwas completed on schedule time, and was delivering powerto the Hollinger mine, on the 1st of June. The minimum natural flow of the Mattagami River atthis point is 1,400 feet per second, and the maximum ob-served flow 15,000 feet per second. By the construction ofa timber crib rock filled dam, 1,000 feet long, and with a . , , . -ri, a ^f^. maximum depth of 25 feel, a storage pond 30 miles long size, one each a l,o00 generator. The flutter. Power House Exterior—Porcupine has been created varying in width from 100 to 400 yards. gates, S. Morgan Smith ma The dam has 10 openings. 16 ft. x 18 ft., and the cribs diameter, and are operated by motors^ are provided with a half-inch steel corner protection, which The two turbines are 43 mch S. Morgan Snu are also used as stop-log guides. These stop-logs are facture. Each is rated at under an head anufacture, are also 10 feet inby electric motors,o turbines are 43 inch S. Morgan Smith manu- so THE ELECTRICAL NEWS of 34 feet. These are dirccl-coiinecled to two ,25-cycle, 3-pliase, 12,500 volt, 2U Canadian Westing-house alternating generators. There are also two exciters,one each on the shaft of the main generator. The water leaves the turbines through draft tubes form-ed in the solid rock, and concrete lined. The dischargepoint is two feet below the surface of the river. Themaximum dimensions of the dra
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