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said Proof Roll tests. The Mine Engineer shall document the date of completion of the mine haul <br />and access roads and shall prepare and retain records of any significant subsequent remedial road <br />maintenance work that may be needed during the life of the mine. <br />Temporary erosion control measures (ditches, berms, straw dikes, silt fence) will be utilized <br />during embankment construction to minimize sedimentation and erosion until permanent control <br />measures can be established. Immediately upon completion, measures will be taken to stabilize <br />all embankments with vegetation cover or other means as approved by the regulatory authority to <br />minimize erosion. Where a vegetation cover is used, consideration shall be given to providing an <br />appropriate growth medium. <br />Drainaize Each haul road not within areas disturbed by mining and reclamation activities will be <br />designed, constructed and maintained to have adequate drainage using ditches and culverts to <br />safely convey the peak runoff from a 10 -year, 24-hour precipitation event while maintaining a <br />minimum of one half foot of freeboard to the top of the road embankment (see Map 2.05.3(3)-3 <br />for typical details of drainage structures). <br />Drainage ditches will be placed at the toe of all cut slopes formed by the construction of haul <br />roads. Water will be intercepted before reaching a large fill and drained safely away in <br />accordance with the requirements of 4.03.1. Water from a fill will be released below the fill <br />through conduits or in adequately lined channels and will not be discharged onto the fill. <br />When drainage ditches discharge onto open terrain, a number of measures will be taken to <br />protect the terrain from erosion. When the drainage discharges onto a disturbed area, the area <br />will be revegetated to control runoff. In an area where revegetation would not be sufficient to <br />control erosion, the area will be rip -rapped. Temporary measures to reduce erosion will be <br />employed while the area is undergoing revegetation such as straw dikes, containment ditches, <br />etc. WFC typically constructs ditches on the inside of roadway cuts and safety berms for <br />drainage. As most road cuts are into resistant bedrock -type material, ditches normally do not <br />require lining. Culverts will be designed and installed to minimize the runoff volume conveyed <br />in each ditch. Culverts and ditches will typically be designed using SEDCAD or other generally <br />accepted software to predict the peak runoff and Manning's equation to determine the peak <br />velocity and flow depth. <br />If the ditch is not stable, then WFC will use a larger ditch section and/or adequately line the ditch <br />in order to comply with applicable regulations. <br />Drainage from haul roads within the areas disturbed by mining and reclamation activities (see <br />Map 2.05.3(3)-3) will be constructed to meet the requirements of 4.05.2 and such haul roads will <br />at a minimum be constructed and maintained to minimize erosion of the disturbed area. Erosion <br />control measures to be used singly or in combination include but are not limited to: <br />Section 2.05.3(3) Page 7 Sept. 2015 (TR -11) <br />