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1 <br /> The gravel surface of the haul roads allows <br /> the constant grading of snow in the winter that is necessary to <br /> keep them open. To the extent possible, these roads have been <br /> constructed , and are being maintained, in a manner that minimizes <br /> adverse effects on stream flow, wildlife and other environmental <br /> concerns . <br /> The 30 + foot wide haul roads have been <br /> constructed within 60 foot wide right-of-ways on the most stable <br /> slopes available. Wh.ere they traverse intermittent streams , <br /> adequately sized culverts have been installed to handle 10 year/ <br /> 24 hour runoffs . Road cut embankments in unconsolidated material <br /> are not steeper than 1V: 1 . 5h nor are they steeper than 1V: 25h in <br /> rock. During the 1981-1985 permit term, Mid-Continent does not <br /> plan to construct additional haul roads with the exception of <br /> those approved for the rock tunnel construction (II-B-3-c) . <br /> In compliance with existing haul road design <br /> criteria (4 .03) , Mid-Continent has designed and implemented a <br /> drainage control plan (Section C, Appendix II-B-7) . Natural <br /> drainage channels have not been altered or relocated by haul road <br /> construction. In all cases, where haul roads cross perennial <br /> streams, culverts have been installed under the supervision of <br /> qualified personnel. <br /> In order to minimize erosion, disturbed areas <br /> adjacent to the culverts have been kept to the smallest practical <br /> size. In areas where stabilization was required, rip rap was <br /> installed . <br /> 41? <br /> r <br />