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Show NPS Form 10-900a (Rev. 8-86) Utah Word Processor Format (02741) Approved 10/87 OHB No. 1024-0018 united states Department of the Interior National Park Service NATIONAL REGISTER OF HISTORIC PLACES CONTINUATION SHEET Section number 7 Page ____6_____ Stairs station Hydroelectric Power Plant Historic District, Salt Lake City, Salt Lake County, Utah supported by s teel stanchions. A walkway made of wood planks, with steel posts and cables for a handrail, is perched on top of the flashboard structure. The southerly end of the dam abuts a rock outcropping. The north end of the dam abuts the no rth s ide of Big Cottonwood Canyon. The intake at Storm Mountain Dam is located at about the middle of the dam, adjacent to its straight section, a bout 10 feet from its upst r eam fa c e. The intake is a reinforced c oncrete structure with a valve and trashrac k . The intake is enclosed by a small wood-frame shed covered with corrugated metal. Storm Mountain Dam in its present configuration was built in 1921 . The dam actuall y no longer funct i ons. A small amount of water poo ls behind the dam, but -Utah Power and Light no lo ng e r ma i ntains a reservoir. The dam was officially ret i red in ca. 1955-1958, apparent l y because wa te r i mpo unded beh i nd i t someh ow became unsu i table f or Sal t La ke Cit y 's Big Cottonw oo d Treat ment P l a nt located near the mout h of the can yon, ju s t below the Gran i te hydroelectric plant. Other featu r es at Sto r m Mountain Dam include po r t io ns o f l ow retaining wall adja c ent to the former reser vo ir a r ea. These low wall s, 1- 3 ft. tall, co nsist o f r u bb l e a nd concr ete . The wa l l s a re most vi sible on either side o f Big Cottonwo od Cre ek wher e Utah Highway 152 crosses the stream j ust east of St o rm Mo untain Da m. As originally constructed in the 1890s, Storm Mountain Dam consisted of a curved, earth fill-structure, roughly situated on an east-west a x is adjacent to the position of the current dam. A spillway, cut into bedrock, was located at the east end of this dam. A drain tunnel was bored through rock just east of the dam. The original dam created a much larger reservoir than the 19 2 1 dam. The low retaining walls described above may have been assoc i ated with the original dam. Otherwise, the principal features of the original dam are no longer visible. Storm Mountain Dam, as built in 1921, has sustained little alteration. Some weathering of the dam has occurred, such as the cracking and fla k ing of the upstream concrete face. Otherwise, storm mountain dam retains integrity of setting, location, |
