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<br />. <br /> <br />4'152 <br />(3) Acquisition of the land for the enlargement of Turquoise <br />Lake required the relocation of the CF&I dam tender and his <br />family and one business. The home sewage system, consisting <br />primarily of outhouses, septic tanks and leaching fields, <br />had to be disposed of in accordance with State regulations <br />so pollutants would not be' introduced into the reservoir. <br />Clearing was required on approximately 1,236 acres including <br />the construction site and borrow area located approximately <br />1 mile south of the dam. The clearing included one permanent <br />residence, one summer resort lodge, and several Bummer cabins. <br />Most of the summer cabins were on land owned by CF&I Steel <br />Corporation and were leased on a yearly basis to individuals. <br />CF&1 terminated these leases prior to Bureau land purchases. <br />Additional clearing included approximately 80 acres of <br />coniferous forest for the relocation and improvement of <br />county roads, about 80 acres of clearing for transmission <br />telephone lines and ditch relocations. The operation and <br />maintenance facilities occupy an area previously used as a <br />borrow area; therefore, no clearing is attributed to these <br />facilities. The clearing temporarily subjected the land to <br />water and wind erosion. This caused the loss of a portion <br />of the A horizon of the soil which is essential to plant <br />establishment and growth, and the runoff carried some of <br />the loose soil to the streams causing temporary, turbid <br />conditions. The clearing caused an edge effect at the <br />interface of the timber and water. Raptors are the primary <br />users of this interface area. <br /> <br />'. <br /> <br />(4) Sugar Loaf Dam enlargement and related construction <br />activities resulted in an alteration of the landscape. <br />Construction resulted in scars from borrow areas, riprap <br />sources and access roads. The riprap was obtained from a <br />previously used source about 4 miles west of the dam along <br />the Carlton Tunnel Road. <br /> <br />(5) Localized short term air, water and noise pollution <br />problems existed during construction activities. <br /> <br />(6) Prior to enlargement, Turquoise Lake fluctuated as <br />much as 20 feet annually. Under Project operations the <br />water surface elevation in Turquoise Lake may vary as much <br />as 94 feet annually. This fluctuation will periodically <br />expose extensive foreshore areas. Some foreshore areas <br />are beach-like while others are rocky. Under ultimate <br />operations, Turquoise Lake will be at its lowest water <br />level in April and begin filling during the spring. The <br />lake is subject to a winter drawdown beginning in October. <br /> <br />. <br /> <br />Iv-62 <br />