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'=' '"'7) >- -...: o Flatiron Pumning Plant and Carter Lake Pressure Tunnel will transfer water from Flatiron ~eservoir to Carter Lake Reservoir. They will also operate in reverse on such waters as are released back through these features for delivery via the Horsetooth Feeder Canal. The proposed pumping plant, to be located at the Flatiron Power Plant, will have a rated capacity of approximately 112,000 gallons per minute for a maximum pumping lift of nearly 300 feet. It will deliver the water via a pressure tunnel, B feet in dla~eter and 1.1 miles long, which ~~ll extend south and upward from the pumping plant discharge conduit to the bottom of Carter Lake ~eservoiro Construction of the tunnel, including a concrete trash- rack structure in the reservoir and a valve chamber with an access shaft near the north shore of the reservoir, will require approxi- mately 32,000 cubic yards of excavation and 7,500 cubic yards of ccncreteo Carter Lake Reservoir will occupy a natural basin located about 8 miles west of Berthoudo Three dams, now under construction, will enlarge the existing basin and provide about 114,000 acre-feet of storage capacity covering an area of 1,174 acres at elevation 57630 This reservoir will store a portion of the imported waters which subsequently will be released southward to the Sto Vrain Supply Canal or returned to the Flatiron ~eservoir for use in the Big Thomason or Poudre Valleyso Carter Lake Dams.--Dam Noo 1, now under construction at the natural outlet from the basin, will be an earth and rockfill type structure ~th a maximum height of 200 feet and a crest length of 1,235 feeto Dams Noso 2 and 3, of similar construction, will be located at low saddles in the hogback ridge north of the main damo The smaller structures will be 75 and 55 feet in height above foun- dation and have crest lengths of 1,150 and 1,425 feet, respectivelyo Construction of the dams will require nearly 4 million cubic yards of excavation and the three dams will contain nearly :3 million cubic yards of selected earth and rockfill materialo A gate- controlled outlet tunnel at Dam Noo 1 will deliver water from Carter Lake Reservoir to the Sto Vrain Supply Canalo Sto Vrain Supoly Canal will lead from Carter Lake Reservoir at Dam Noo 1 and extend south 907 miles to Sto Vrain Creek near Lyooso Enroute, it will cross the Little Thompson ~iver which will also receive suoplemental water frO!Il the reservoir~ Horsetooth Feeder Canal begins at the Flatiron ~eservoir and extends north 13 miles to Horsetooth Reservoiro Enroute, it crosses the Big Thompson Canyon and will deliver water to the Big Thompson Rivero In addition to water received from the Flatiron Reservoir, this canal will also receive water from the Big Thompson River via the appurtenant Horsetocth Supply rAnduit which leads from an intake strGcture on the river and extends east about one mile through the canyon wall to join the ca~al cn the south side of the rivero Pending completion of the Estes Park-Foothills Power System, the ??