Laserfiche WebLink
i ii iiiiiiiiniu iii <br /> 999 <br />RAYE & ASSOCIATES <br />976 WELCH COURT • GOLDEN. COLORADO BO401 • 13031 9894916 <br />January 11, 1985 <br />Ms. Candy_ Thompson <br />Colorado Mined Land Reclamation Division <br />1313 Sherman Street, Room 423 <br />Denver, CO 80203 <br />RECEIVED <br />JAN 141985 <br />tAINED IAND RECUMATION DIVISI <br />Cola Dept of Natural Resources <br />RE: THE ROCKCASTLE COPdPANY, GRASSY COAL MINE <br />PIT 4 HAUL ROAD CERTIFICATION REQUIREMENTS <br />Dear Candy: <br />Dan told me that The Rockcastle Company should submit informa- <br />tion on three additional items to successfully certify that Pit <br />4 haul road had been constructed in compliance with the regula- <br />tions and with the design in the permit. The three remaining <br />items were: (1) seeding of cut and fill slopes, (2) type of <br />surface applied to the road, and (3) culvert spacing. <br />The first two are straight-forward. The Rockcastle Company has <br />seeded all cut and fill slopes (except the cut slope at Station <br />~0+00) with Seed Mix #2, the seed mixture for harsh sites. <br />Station 50+00 is the slide area about 2/3 the way up the road. <br />It has been seeded with Seed Mix #1, the seed mixture for stock- <br />piles and temporary stabilization. Seed Idix #1 was used to estab- <br />lish a quick root system to aid in stabilization. Seed i°lix #2 <br />will be applied to this area in the fall of 1935. <br />The road surface on Pit 4 haul road consists of 12-13" of durable <br />rock taken from the bottom of Pit 4. A 6" layer of alluvial <br />gravel has not and will not be applied. Experience gained at the <br />other five nits proved that alluvial gravel would not stay on <br />surfaces other than flat grades. Bob Sherman to13 me they had <br />tried gravel at several of the other pit haul roads with inclines <br />about 60. 1-Ieavy traffic combined with continual maintenance <br />essentially rolled the gravel off the surface. Bob intentionally <br />avoided use of gravel (river rock) on Pit 4 haul road. <br />Pit 4 haul road was constructed in the manner described in the <br />permit. Since the road joined Pit 4 at a higher elevation than <br />planned, the exact alignment is somewhat different than planned, <br />