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<br />INSPECTION REPORT - PAGE 2 <br />FILE N0. M-77-526 <br />DATE: April 29, 1986 <br /> <br />OBSERVATIONS OF IMPORTANCE: <br />1. Inspector was accompanied by Al Frei, Steve O'Brian and the site foreman. <br />2. Sloping at the southeast lake area will require 3H:1V grade prior to <br />final release. <br />3. Good stores of topsoil are located at north end of the main pit. <br />4. Asphalt is being used to fill the southwest lake area. <br />5. Operator has established small trees at various locations around the pit <br />area. <br />6. The northwest pit area is separated from the South Platte River by a <br />minimal (30-40 foot) setback. Most other setback areas are eroding <br />along the river bank. <br />RECOMMENDATIONS: I <br />1. Future mining should maintain a minimum 150 foot setback from the <br />river. A 100 foot setback was clearly specified in the 1981 Techincal <br />Revision. <br />2. The operator should consider filling the lake side of the setback at the <br />more narrow locations. <br />3. Only clean rip-rap (no-rebar) should be used along the South Platte and <br />only if approved by the appropriate federal regulatory agencies. <br />4. ~ Remove all asphalt and rebar materials from along the river. <br />5. The operator should lessen the bank gradient along the South Platte <br />fiver to achieve a shallower shoreline gradient. This will enhance the <br />chances for revegetation and bank stabilization. Preferably, banks <br />should not exceed 3H:1V or 2H:1V. The following seed species may work <br />well: <br />~65, PLS <br />-Tall fescue ~~ <br />-Switchgrass -2.7 <br />-Western wheatgrass 9.6 (Broadcast rate) <br />Slopes must be reduced prior to seeding. <br />