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The Big Cottonwood Water Treatment Plant can take water from flow remaining in Big Cottonwood Creek through its south intake, in addition to the water exiting Granite power plant. Water coming from the power plant is cleaner than water in the...
2009-08-24
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The first stage in water treatment is a screening process that takes out branches, dead animals, cigarette butts, etc. anything that will float. A water jet sprays off the collected debris into a wire enclosure called a back trough. The debris...
2009-08-24
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The plant is a conventional water treatment facility with four stages: disinfection, coagulation, sedimentation and filtration. A flash mixer adds hypochloride as a disinfectant. Often, hydrated lime is added, too, to boost alkalinity, since...
2009-08-24
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Coagulation is a positive-negative ion process. Plant managers add chemicals with a positive charge. Negatively charged bacteria and dirt join with the chemical to form a floc molecule. A series of motors turns the water so that the floc...
2009-08-24
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Water flow slows in the sedimentation process so that the beefy floc molecule can drop to the bottom of the two reservoirs, stacked on top of each other. The Big Cottonwood Water Treatment Plant can treat 42 million gallons a day. It provides...
2009-08-24
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After the water passes through a baffle wall separating sedimentation and filtration, it enters the last stage. Anything left in the water is filtered out when it is forced down through two sets of filters, one of anthracite coal and the other...
2009-08-24
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The pipe gallery lies underneath filtration. Pipes painted light gray carry not completely treated, raw water going into filtration. Blue pipes carry completely treated water into the Salt Lake City system.
2009-08-24
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Technicians test the water for residual chlorine every two hours. The state requires residual chlorine in water leaving the plant to ensure that, if there were any breach in the system downstream, the residual chlorine would keep the water pure.
2009-08-24
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Water passing through the turbine turns the generator. Depending upon water flow, the generator can produce between 1.2 and 1.3 megawatts of power.
2009-08-11
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When water leaves the plant, turbidity is less than required by the Environmental Protection Agency.
2009-08-24
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Typically, filters are cleaned every 72 hours, the flushed water deposited into receiving basins. That backwashed water is cleaned and routed back to the treatment starting point. The plant doesn't waste any water.
2009-08-24
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The Big Cottonwood Water Treatment Plant only can take in 60 cfs. During periods of high flow most of Big Cottonwood Creek water is routed past the south intake into the streambed.
2010-06-09
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The Big Cottonwood Conduit moves water from the water treatment plant to distribution reservoirs at 33rd South. A manhole near Pete's Rock is a remnant of the old Big Cottonwood Conduit. Now the Big Cottonwood Conduit runs underneath Wasatch...
2009-08-11
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Upscale homes in Cottonwood Heights now occupy the flood plain at the mouth of Big Cottonwood Canyon. Once water leaves the canyons, its no longer part of the watershed, and the Salt Lake City Department of Public Utilities has no say in...
2008-06-27
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Flood retention basins like the one at the mouth of Big Cottonwood Canyon can mitigate the effects of heavy runoff by capturing high flow and easing it back into the streambed at measured intervals. The Big Cottonwood Creek streambed is so porous...
2008-06-27
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Water in the irrigation ponds at the Old Mill Golf Course near the mouth of Big Cottonwood Canyon can come from three different sources, depending upon the time of year: Big Cottonwood Creek, Utah Lake via the East Jordan Canal Extension and...
2008-06-03
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Stairs Station is a substation. Circuit breakers control power moving down or up canyon.
2009-08-11
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Municipalities like Murray City store water in reservoirs like the one on Fort Union Boulevard in Cottonwood Heights. The high elevation and the head it generates enables the water purveyor to provide water pressure to city homes lower in...
2009-04-10
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Developers of Old Mill Corporate Center in Cottonwood Heights incorporated Big Cottonwood Creek into their real estate development.
2007-06-05
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Developers of Old Mill Corporate Center in Cottonwood Heights incorporated Big Cottonwood Creek into their real estate development.
2007-06-05
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The Old Mill Corporate Center is an important node in the valley irrigation system. Water from Utah Lake is pumped from the East Jordan Canal Extension east to the center. From there it flows north into the Upper Canal to fulfill exchange...
2007-06-05
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Construction of I-215 required boulder revetments to stabilize the Big Cottonwood Creek stream banks.
2007-06-05
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Big Cottonwood Creek supplies water for Tanner Ditch at 6200 South and Knudsens Corner.
2007-05-22
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When people encroach on streams, they make their homes vulnerable to flooding. This area in Holladay experienced severe flooding during the wet years of 1983 and 84.
2007-05-22
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Once it exits the Stairs Station power plant, water moves through the tailrace into the Granite forebay.
2009-08-11
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