El Dorado irrigation District plans to replace worn out fish screens at its El Dorado Diversion Dam near Kyburz, but first it must reconstruct a system of blowout pipes that clean debris from the screens.
On Sept. 10 the district accepted the low bid of $49,500 from Canyon Metal to supply what amounts to between half a mile and three-quarters of a mile of stainless steel piping.
The existing blowout pipes are galvanized steel and are corroded from exposure under water.
EID crews will assemble the piping into the blowout pipe array. It will take 15 man-weeks to complete the custom fabrication in time for the 2013 fall canal outage. There were two other bidders with the highest being $53,000.
Total funding for the fish screen project is estimated at just under $214,000, including capitalized labor expense. The fish screens have not been purchased yet.
The diversion dam collects the water from the South Fork of the American River that is released from four alpine reservoirs. The diverted water is sent into the El Dorado Canal, a 22-mile system of canals, flumes and tunnels before it arrives at Forebay Reservoir in Pollock Pines. That reservoir supplies one-third of the district’s drinking water as well as spinning turbines at the 21-megawatt Akin Powerhouse.