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<br />. 1"~ <br />~~~J <br /> <br />(2) About 130 acres of clearing were required. Nearly <br />25 acres were attributed to tunnel construction, 10 acres <br />for diversion dams, 15 acres for conduits, and 80 acres <br />for access roads. The Twin Meadows Aggregate Source was <br />used for the North Side Collection System also and has <br />been discussed with the South Side Collection System. The <br />25 acres cleared for tunnels were used. for deposition of <br />spoil. <br /> <br />. <br /> <br />(3) Tunnel spoil deposits will be absent of vegetation <br />until they are rehabilitated. During the absence of <br />vegetation, the spoil.may be ~onsidered incongruent with <br />the surroundings and susceptible to wind and water erosion. <br />The lack of organic material and the inability to retain <br />water near the surface in the spoils may inhibit the rate <br />of res~oring vegetative cover. <br /> <br />(4) Cutting of trenches was necessary to install conduits. <br />Some reaches of conduits cross sloped areas. This required <br />some clearing of timber and trenching through areas of <br />fragile geological structure and soil. The trench excava- <br />tion was used to cover the conduits and fill the trenches. <br />The soils will have a tendency to slough and slump along <br />sloped areas, and it may be difficult to stabilize material <br />for rehabilitation. <br /> <br />. <br /> <br />(5) Road construction through cohesive soils in the <br />mountainous areas which are exposed to construction <br />activity will be subject to erosion. The topsoil along <br />. with much of the organic material on the steep slopes and <br />level areas of the higher altitudes could be lost f~Q~ <br />disturbed areA~ ~~d wvulJ also be difficult to revegetate <br />should erosion be severe. Vegetation would also be difficult <br />to reestablish because of the immature soil and the short <br />.growing season associated with high country, <br /> <br />(6) Where heavy construction and vehicular traffic occurs, <br />there will be soil compaction. Where the same route is <br />used repeatedly, the compaction will cause the soil to <br />lose its ability to hold water and maintain vegetation. <br /> <br />(7) The access roads will increase the hunting and fishing <br />opportunity in the specific areas allowing a greater use of <br />the resource, although some disturbance of wildlife will <br />occur from increased human and vehicular traffic. <br /> <br />. <br /> <br />IV-59 <br />