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Runoff to Lakes After Reclamation <br />Project: Runoff to Lakes Post -Mine <br />By: B Langenfeld Date: 04/20/12 <br />Location: Tomichi Pit <br />Checked: <br />Date: <br />Developed <br />1. Runoff Curve Number (CN) <br />Cover description <br />CN Soil Group <br />Area(Acre) <br />Herbaceous mixture (Good) <br />74 C <br />19.630 <br />Pasture Grassland Range (Good) <br />74 C <br />114.745 <br />Water Surface <br />98 C <br />49.500 <br />CN (weighted): 80.5 <br />Total Area: 183.875 Acre <br />2. Runoff <br />Return Period: 100 -Year <br />Rainfall, P: 2.20 <br />in <br />Runoff, Q: 0.7094 <br />in <br />Runoff Volume: 10.8703 <br />Acre -Ft <br />Runoff to Leave Site Post -Mine <br />Project: Runoff that Leaves the Site Post -Mine <br />By: B Langenfeld Date: 04/20/12 <br />Location: Tomichi Pit <br />Checked: <br />Date: <br />Developed <br />1. Runoff Curve Number (CN) <br />Cover description <br />CN Soil Group <br />Area(Acre) <br />Pasture Grassland Range (Good) <br />74 C <br />25.081 <br />CN (weighted): 74.0 <br />Total Area: 25.083 Acre <br />2. Runoff <br />Return Period: 100 -Year <br />Rainfall, P: 2.20 <br />in <br />Runoff, Q: 0.4474 <br />in <br />Runoff Volume: 0.9351 <br />Acre -Ft <br />Tomichi Pit, December 2013 G -3 <br />