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• When practicable, haulroads are located on the top of ridges. Switchbacks are used in steep topogra- <br />phy. Road sections containing switchbacks are located between drainages when practicable. Thus <br />switchbacks tend to 'criss-cross' the ridge lines. Coincident with our reclamation program, the <br />locations of haulroads are designed to minimize intederence with drainage and runoff. <br />Fords are not used, except temporariy during road construction. When it is necessary to cross a <br />drainage, proper sized culverts and well-constructed tills are used. Fords of ephemeral streams are <br />used during periods of no flow. Perennial streams are not forded. When practicable, haulroads are lo- <br />cated to minimize drainage crossings. Again, all steps taken to control drainage and minimize the <br />interference of such, by haulroads, are an integral part of our overall reclamation program, including <br />sedimentation ponds as discussed below. <br />Haulroads are generally located within the immediate affected areas and ahvays within the proposed <br />permit area. Runoff from the affected areas is controlled by a network of sedimentation ponds. <br />Because of this, in most instances, haulroad runoff will drain through setlimentation ponds. <br />3.7.2.2 Design and Construction <br />With minor exceptions, grades for haulroads do not exceed ten percent, and the overall grade is ten <br />• percent or less. When practicable and in most instances, haulroads are designed at eight percent or <br />less grade. This is true of most Trapper Mine haulroads. If necessary, future haulroads may have <br />maximum pitch grades up to 15 percent, but the pitch grades exceeding ten percent shall be less than <br />300 feet per consecutNe 1000 feet. <br />• ~ PRV3 --- 1 <br />s-1st ! i FtEVISIDN APPpRO~j ED ` <br />~ DATC >/`~! ~73 <br />~.` - --- <br />