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terrace would be more effective in sediment control and watershed improvement than a <br />20-foot terrace. Please explain how a larger terrace would reduce the TSS and total <br />volume of flows leaving the permit azea. <br />I c. The postmining contour map depicts the road to remain in place at the Bowie # I Mine. <br />From the map, it appears that it is not essential to have a terrace width over 20 feet to <br />accommodate the location of the road. Please explain to the Division why terrace widths <br />of over 20 feet aze necessary for the postmining road configuration. <br />Please respond to these questions by February I, 1998. If you have any questions, please do not <br />hesitate to call. <br />Sincerely <br />~S <br />Erica S. Crosby <br />Environmental Protection Specialist <br />cc: David Berry <br />Joe Dudash <br />Larry Routten <br />c:\esc\misc\971218 <br />