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COLORADO <br />Division of Reclamation, <br />A7Mining and Safety <br />Department of Natural Resources <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />September 7, 2018 <br />Permit Renewal 08 <br />C-1980-004 <br />Task 015 — Stream Channel Erosion Protection $57,580.00 <br />Riprap protection for channel R-2, R-5, R-6 and R-8 require 650 cu. yrd of riprap for slope protection (from RS <br />Means Building Construction Cost Data, 2018 Edition; Section 3137 13.10 0200) has a cost of $76.30/cubic <br />yard. <br />(650 cu. yd.) x ($76.30/cu.yd.) = $49,595.00 <br />Erosion blanket protection for channels R-1, R-3, R-4, R-7 and R-12 requires 1912 sq. yd. of blanket. The cost <br />of the blanket including installation is $1.41/sq. yd. (from RS Means Construction Cost Data, 2018 Edition: <br />Section 3125 14.16 0020). <br />(1,912 sq. yd.) x ($1.41/sq. yd.) = $2,695.92 <br />Total erosion control = ($49,595.00) + ($2,695.92) = $52,290.92 <br />Using 1 Cat 324D L Excavator for 40 hours (1 week); $124.56 x 40hrs = $4,982.40 <br />Stream Channel Erosion Protection — Total Cost <br />($52,290.92) + ($4,982.40) = $57,273.32 <br />1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 F 303.832.8106 http://mining.state.co.us <br />John W. Hickenlooper, Governor I Mike King, Executive Director I Virginia Brannon, Director <br />