Laserfiche WebLink
Blue Pit 112 Permit Amendment <br />to divert drainage away from the pit. The west side of the pit drains away from the pit. See Figure <br />2 for a map of the general drainage of the reclaimed site. <br />Within the pit all runoff will be controlled. All disturbances are graded to the pit floor which is <br />sufficient to hold a loo year event that drains to the permit area. Additionally, the material of the <br />pit floor is very porous because it consists of large gravelly material. Stormwater that is encountered <br />within the pit will infiltrate to the groundwater as it does today. The reclaimed 3H:iV side slopes <br />will have stormwater catchment benches which will prevent erosion. The stormwater catchment <br />benches will be graded to one of three grouted channels to take the water from the slope to the pit <br />floor. All post- mining drainage features are shown on Map F. See Exhibit G for more details on the <br />design of the ditches and grouted channels. <br />The Basin Ditch currently (see Map C -i) runs through the proposed expansion area. An agreement <br />has been reached with the ditch company to leave a berm during and after mining to support the <br />ditch. The berm relocation is shown on Map F. <br />Blue Pit May 2014 E -6 <br />