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• <br /> <br /> <br />Access to the gate valve and riser shall be provided by a field <br />fabricated catwalk from the bank of the pond. <br />REFERENCES <br />Wishchmeier, W.H., 1974, New Developments in Estimating Water <br />Erosion. Proceedings of the 29th Annual Meeting of the Soil <br />Conservation Society of America. <br />Wischmeier, W.H., Johnson, C.B., Cross, B.U., 1971, A Soil <br />Erodi6ility Nomograph for Farmland and Construction Sites, <br />Journal of Soil and Water Conservation, September-October. <br />OSM (1981) Surface Mater Hydrology and <br />Prepared for Office of Surface Mining, <br />tract Na. J7000584. <br />Sedimentology Manual. <br />Region V under Con- <br />D-9 <br />