Laserfiche WebLink
entire area between the reservoirs, and that it was determined to be more economical to protect the <br />north slope of Reservoir 2 against erosion during overtopping. Please provide the design <br />assumptions used to predict the factor of safety for the stability of the Reservoir and of the St. Vrain <br />River. Please also state how Reservoir 2 will be protected against erosion during overtopping and <br />into Reservoir 4 to protect underground facilities in the area. Attached is a document prepared by <br />the Urban Drainage and Flood Control District that provides some general guidelines for gravel <br />mines within the 100-year floodplain. Weld County should describe the rip-rap currently in place <br />along the River that could be used to prevent erosion of the reservoirs. <br />Please be advised that the Hokestra Pit AM-03 Application may be deemed inadequate, and the <br />application may be denied on April 4, 2008 unless the above-mentioned adequacy review items are <br />addressed to the satisfaction of the Division. If you feel more time is needed to complete your reply, the <br />Division can grant an extension to the decision date. This will be done upon receipt of a written waiver <br />of your right to a decision by April 4, 2008 and request for additional time. This must be received no <br />later than the deadline date. <br />If you have any questions, please do not hesitate to call. <br />Sin ly, <br />0i <br />Erica Crosby <br />Environmental Protection Specialist <br />Enclosure(s) <br />cc: Carl Mount; DRMS <br />Jennifer Lee; Applegate Group, Inc.