| OCR Text |
Show construction; whereas, in the alternative plan, the pipe would be hidden under the road. The adverse effect of this plan would be the dewatering of an additional 300 feet of live stream in South Fork. Another alternative would be to eliminate Docs Feeder Pipeline and construct a k, 000- foot- long 7- foot- diameter feeder tunnel from Docs Diversion Structure to Upper Stillwater Reservoir. This alternative would cost about $ 2,200,000. The beneficial result would be the elimination of the scar caused by the feeder pipeline. Adverse effects would be the construction scars at the tunnel portals. The inlet portal of the feeder tunnel would be in a steep canyon, where it would be hidden from the nearby road and campgrounds; however, the outlet portal would be on the reservoir shoreline just upstream from the dam, where it would be visible to boaters. The spoil area for this tunnel would be hidden under the reservoir water surface. Another alternative which has been suggested would be to construct Docs Diversion Structure about 1\ miles upstream from the proposed site and construct a 1,200- foot feeder tunnel from the dam to Stillwater Tunnel, which would cross South Fork about 850 feet beneath the surface. This plan would result in an annual loss to the aqueduct of 800 acre- feet of water which would enter the stream below this alternative diversion site. Its beneficial results would be the elimination of Docs Feeder Pipeline and its scars. Adverse effects would be the dewatering of 1% additional miles of a live stream and its aquatic habitat and the accumulation of tunnel spoil. The diversion dam and tunnel portal would be adjacent to and visible from a Forest Service road. Hades Creek Diversion Structure and Feeder Pipeline The Hades Creek Diversion Structure and Feeder Pipeline would divert water from Hades Creek southerly approximately 2 3A miles to the inlet of the North Fork Siphon. The Forest Service has suggested an 580 |
