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• A detailed plan with engineering drawings of the detour has been supplied to Montrose County <br />for approval together with the revised special use permit application for the mine in July of <br />1999. Once final approval is granted, documentation will be supplied to the Division. <br />u <br />• <br />The existing portion of BB Road through the amendment area will be used until mid to late year <br />2000 when mining will require the use of the detour. The detour will be 4550 feet long and will <br />be installed to the Montrose County Road and Bridge specifications for collector roads. This <br />entails the following items: <br />1) Aright of way of 60 feet (the same as the existing road), <br />2} 1.25" thickness of chipseal <br />3) 4" thickness of class 6 roadbase <br />4) 14" thickness of class 2 pit run gravel where the largest size stone will be 8" in size. <br />6) ~ Total road width = 26.0 feet <br />5) chipseal width of 24.0 feet (same as existing road) <br />7) 2% grade from centerline to each side <br />8) 4% superelevation on curves <br />9) Compaction of all surfaces to 95% AASHTO T 180. Test results throughout the road <br />length will be submitted to the County demonstrating this compaction. <br />10) Inside road ditch in all cuts which will be at least 1.5 feet deep and 2:1 sideslopes <br />11) Maximum fill slope - 2.OH:1.OV <br />12) Maximum cut slope - 1.5H:1.OV <br />13) Minimum horizontal curve - 200 feet radius. An existing curve immediately north of the <br />detour is less than 100 feet in radius. <br />(REVISED 12/00) Attachment 2.05.3(3) -10-126 <br />