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Colowyo Mine: pg. 2 <br />Over the course of the past two years the permittee has devised, and worked with Mr. Walker to <br />approve as a minor revision to the permit, various runoff control strategies to reduce overland <br />Flow velocities, trap sediment, and minimize erosion along designated drainage ways receiving <br />runoff from the haulroad. These drain ways were rip rapped where necessary, had protected inlets <br />and outlets, and contained dugout sediment traps where necessary (which were designed for <br />routine sediment removal) to reduce erosion and trap sediment. All the azeas I inspected were <br />stable and had recently been maintained. The permittee has done a good job of minimizing the <br />effects of haulroad runoff and no off site impacts were documented during the inspection. Haul- <br />roads in the active pit areas were being watered for dust suppression during the inspection. <br />We also evaluated topsoil removal, storage, and replacement on the mine. We inspected most of <br />the mine topsoil stockpiles and all the stockpiles appeared to be on stable areas and well <br />vegetated. Both topsoil removal and replacement are contemporaneous, and the permittee is <br />avoiding topsoil removal where the soil is still too wet. It appeazed from color differentiation and <br />general observations that the permittee is removing all topsoil and other suitable soil material as <br />required. The reclamation redisturbance necessary for the West Pit fill expansion has minimized <br />redisturbance and salvaged all soil materials. Topsoil removal operations were observed during <br />the inspection. The permittee is conducting topsoil removal, storage, and redistribution as <br />required, and as approved in their permit. <br />Please address any questions concerning this report to Henry Austin at haustin@osmre.eov or to <br />(303) 844-1400 x1466. <br />