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<br />. <br /> <br />~ f ~ ~ <br />~~~U <br /> <br />a. Cumulative Impacts of the Components <br /> <br />(l) There was no acquisition of private lands for the above <br />features. All lands needed were withdrawn from the White <br />River National Forest for the construction of all of the <br />South Side Collection System features. <br /> <br />(2) About 150 acres of clearing were required. Nearly 35 <br />acres ~ere attributed to tunnel construction, 9 acres for <br />diversion dams, 10 acres for conduits, 7l acres for access <br />roads, and 25 acres for the Twin Meadows aggregate source. <br />Twin Meadows also provided aggregate for the North Side <br />Collection System construction. <br /> <br />The 35 acres cleared for tunnels were used for deposition <br />of tunnel spoil. <br /> <br />With the construction activities occurring in remote areas, <br />human wastes had to be confined to the sanitation facilities <br />at the camps. These facilities were disposed of in accord- <br />ance with State standards, thereby minimizing the area <br />subjected to the effects of human waste disposal. <br /> <br />. <br /> <br />(3) Tunnel spoil deposits will be absent of vegetation until <br />they are rehabilitated. During the absence of vegetation, <br />the spoils may be considered incongruent with the surround- <br />ings, and be susceptible to wind and water erosion. The <br />lack of organic material and the inability to retain water <br />near the surface in the spoil may limit the rate of restoring <br />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 />steep sloped areas, and it may be difficult to stabilize <br />material for rehabilitation. <br /> <br />(5) Road construction through low cohesive soils in the <br />mountainous areas which are exposed to construction activity <br />will be subject to erosion. The topsoil along with much of <br />the organic material on the steep slopes and level areas of <br />the higher altitudes could be lost from disturbed areas and <br />vegetation would be difficult to reestablish should erosion <br />be severe. Vegetation would also be difficult to reestablish <br /> <br />. <br /> <br />IV-56 <br />