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II West Coal Refuse Facility Swctura] Design and Analysis <br />Sedimentation Pond E Retaining Structure <br />1. For ultimate strength design: <br />a. Live load factor: 1.7 <br />b. Dead load factor: 1.4 <br />2. For temperature reinforcement of watertight structures, a steel azea of a <br />minimum 0.2 percent times the cross-sectional area of concrete will be <br />used. <br />3. The minimum concrete cover of reinforcing steel in the wall is as follows: <br />a. Base slabs cast against earth, bottom mat 3-inches. <br />b. Walls and slabs, side exposed to water 2-inches <br />c. Walls, side exposed to earth 2-inches <br />6.4 Structural Analysis <br />Conventional elastic methods of analysis will be used for the structural design. <br />6.5 Design Codes and Standards <br />UBC -Uniform Building Code, 1997 Edition <br />• ACI -Building Code Requirements for Reinforced Concrete (ACI 318-99) <br />• AWS -American Welding Society <br />6.6 Conclusions and 12ecommendations <br />The final geometry for the concrete retaining wall is shown on Drawing No's 2 and 3 <br />given in Appendix A. In general the wall is designed as follows: <br />Max Wall Height: 14 feet <br />Wall Thickness: 2 feet <br />Footing Width: 10 feet upstream of wall <br />3 feet downstream of wall <br />Footing Thickness: 2 feet <br />Shear Key: 2 feet wide <br />2 feet deep <br />• <br />• <br />7 <br />