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4) Rehabilitating the outlet to SaltLick Gulch <br />A pipe would be installed thtough the north dam to convey wateY back to the existing outlet <br />channel that ieturns flow to SLG. The outlet of the pipe would be protected with concxete <br />baffling and riprap. The remainder of the oudet channel would remain undisturbed. The <br />oudet channel to SLG cxosses I-70 in a concYete culveYt constructed and maintained by the <br />Coloxado Depaxtrnent of Transpoxtation (CDO'I~. <br />5) Temporaryroad access improvemer~ts <br />Construction access to the xeservoir site at Lake Hill is via Lake Hill Comznunication Site <br />Road (Foxest Development Road 45.1) and Old Dillon Reservoir Road (Foxest Development <br />Road 45.1A) from the Dillon Dam Road. Both xoads aYe e~risting Foxest Development Roads <br />for adininistxative use only for the operation and maintenance of the Lake Hill facilities. <br />Minor impxovements of the roads would be needed to accommodate construction vehicle <br />traffic. The Yoads would Yemain open to administrative use at the completion of the project. <br />The pxoject ieqwres a temporary const.~ucrion access Yoad fox construction of the new <br />diversion structure in SLG and piping of the Dillon Ditch north of I-70. The access to the <br />SLG divexsion and Dillon Ditch north of I-70 is the e~sting Lower Salt Lick Gulch Road <br />(Forest Development Road 1260W.2). Minor improvements would be needed on the road <br />surface of 1260W.2 to accommodate construction vehicles. After completion of the project, <br />the xoad prism would be reseeded and allowed to develop into a single-track trail, which is the <br />preferred management use for 1260W.2 in the Forest Txavel Management Plan. The road <br />structuYe would xemain allowing continued to adinuiistsative uses by the Forest Service as well <br />as futuxe operation and maintenance of the Dillon Ditch pipeline and SLG headgate. <br />6) Burying overhead power and cable lines <br />The White River National Forest Land and Resource Management Plan xequixes that <br />ovexhead powex lines less than 33kVA in a project aYea must be buried as paYt of the pxoject. <br />The project would bury the overhead lines that carry Xcel powex and Comcast cable thtough <br />the pxoject area. The lines would be buried in the cYest of the south dam and along the <br />existing alignment a shoYt distance on either side of the dam to the tie in with the existing <br />ovexhead lines. <br />7) Wetland creation <br />The pxoject would cause a loss of wetlands around the e~cisting reservoix shoreline; in SLG at <br />the new diversion construction; and, in the Dillon Ditch fxom the pipeline installarion. To <br />replace the functions performed by those wedand habitats, the pxoject pYOponents propose a <br />compensatory mirigation plan that creates wetlands in the pxoject aYea. This replacement of <br />wetland functions is required thxough the FS approval pYOCess, the US Army Corps of <br />EngineeYS Section 404 peYmit, and the Suininit County 1041 approval. <br />Tetxa Tech completed a geotechnical evaluation and dam safety hazard analysis of the <br />pxoposed project ((see ODK Geotecb, Exhibit K). Risks fYOm natuxal hazaxds axe not an issue for <br />the pYOposed enlaYgement. In addition, the ColoYado State EngineeYS' Office of Dam Safety <br />will conduct an extensive review of the design plans duting the Dam Safety Pexmit review, and <br />xisk from natural hazards will be an impoYtant aspect of that review. <br />13 <br />