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Revised, June 9, 1992 <br />shown on the Haul Road "A" Profile (Map 25) and Haul Road "B" <br />Profile (Map 25A). Haul roads, access roads and light use roads <br />are discussed in Sections 4.03.1 through 4.03.3. <br />The hydrologic calculations for road drainage structures are shown <br />in Exhibit 7, Hydrology Information. <br />Haul roads as mapped have been in existence since construction in <br />1976 and 1977. <br />On June 5, 1985 Colowyo requested a revision to provide for repairs <br />and remedial action to stabilize a debris slide along the paved <br />haul road. The Division approved the revision on June 12, 1985. <br />For the location of the slide area refer to Map 22 - Existing <br />Structures - South. For additional details refer to Exhibit 17 - <br />Haul Road and Facilities Modifications. <br />All truck routes constructed during the permit term within the <br />immediate mining area are exempt from any construction specifica- <br />tions, since roadways within the immediate mining pit area are not <br />included within the Code of Colorado Regulations Definition of <br />"road" (Rule 1.04(111)). <br />In general, however, mining area truck routes are built with a <br />crown, are ditched on either side, have berms of at least axle <br />height on outside (downslope) exposures, and only exceed grades of <br />nine percent for distances of less than 100 yards. Typical truck <br />routes are from 75 feet to 100 feet wide, are surfaced with sized <br />crushed rock, and are maintained with motor graders. <br />Ponds. Impoundments and Diversions <br />To control runoff and protect surface and ground water quality, <br />Colowyo has constructed several sedimentation structures and <br />diversion ditches. The Hydrology - North Map (Map 11) and the <br />Hydrology - South Map (Map 12) show the locations of the <br />sedimentation ponds and diversion structures. <br />r <br />2.05-21 <br />