GENERAL40389 - Laserfiche WebLink

Home Browse Search

7 during the October 14, 1997 inspection. This livestock pond had not been included in Colorado Yampa Coal Company's Annual Livestock Water Tank Reports, nor were livestock pond certifications on file with the Division for this pond. On December 9, 1997, Colorado Yampa Coal Company provided livestock pond certification and demonstration for a permanent impoundment in accordance with Rule 4.05.9. Livestock pond 6-b is incompliance with Rule 4.05.9 and is approved to remain as a permanent structure in support of the post-mining land use. A small, approximately 40 ft. long by 20 ft. wide by 3 ft. deep, livestock pond was encountered at the far east portion of the East Block during the October inspection. This livestock pond was of very limited size, held little water and was not located in a drainage that would support surface flow into the pond. The Division considered this livestock pond of limited utility to support the post-mining land use. Colorado Yampa Coal Company graded out and seeded this livestock pond following the October 14, 1997 inspection. The resulting regraded area is estimated at a quarter of an acre. Furrows approximately 4 inches in height have been left to provide surface roughness. The azea was seeded with a pastureland seedmix. The disposition of this livestock pond is acceptable to the Division. Several drainages and ditch locations were identified during the October 14, 1997 inspection as needing rip-rap, rock check dams, or other reinforcement to halt further down cutting in select locations. All rock armoring or check dam placement identified in the October inspection had been satisfactorily completed by the November 18, 1997 inspection. The Division is satisfied with these repairs. Collection ditches M-1 and M-2 were approved as permanent structures in support of permanent livestock pond M. Other collection ditches remaining on the perimeter of the reclaimed areas include ditches R-I, N-2, and O-1. Ditch R-1 is located at the northwest perimeter of the Eastern Block. Ditch R-1 directs flow into livestock pond U-a m support of the post-mining land use. Repairs recommended during the October 1997 inspection had been sufficiently completed by the November 18, 1997 inspection. Collection ditch O-1 crosses a portion of the North section of the West Block. Ditch O-1 directs runoff from up slope of the reclaimed area to livestock pond O. Grading of ditch O-1 to provide positive drainage to livestock pond 0 was identified during the October 13, 1997 inspection. Appropriate grading was completed during the November 1997 inspection. Collection ditch N-2 runs along the western perimeter of the northern section of the West Block. This collection ditch directs water to the north off the reclaimed area. Several locations needing rock check dams were identified during the October 1997 inspection. These repairs were completed by the November inspection. Livestock ponds M, 0, and U-a have previously been approved as permanent swctures. Pre-mining Topography Map 46 depicts general topography and drainage density existing prior to permitting Mine No. 2 under the Colorado Surface Coal Mining Reclamation Act. Map 46 depicts disturbance areas existing as of August 6, 1979, and provides no information on topography existing prior to those disturbances. Some of the pre-1979 disturbance areas are covered under this bond