2013-09-04_REVISION - C1981041 (9)

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Mike Boulay -5- August 27, 2013 Ute Water Conservancy District water treatment, storage facility and pipelines; City of Palisade raw water pipeline system, water treatment and storage facilities; Colorado Ute Transmission Line; Rapid, Cottonwood, Jerry and Coal Creeks. 1982 — Subsidence cracks were found by property owner on Powder Mountain Ranch properties, Sections 1 & 2, Township 11 South, Range 98 West of the 6th P.M. 1994 Annual Subsidence Report January 25. 1994 — Subsidence inspection — Cracks were found at the Roadside South Mine over the 5th West Panel. These cracks were up to 12 inches wide, 300 ft. long and 20' deep. They were located on a steep hillside covered with alluvial material and slump blocks from the cliffs above. The cracks were over an area of secondary mining and may be related to subsidence or may be related to normal landslide activity. September 14. 1994 — Subsidence inspection — Cracks were found and photographed. These cracks are approximately 3" wide, 100' long and 5' deep. They were located on the top of the ridge in a gray shale or silty sandstone. The cracks are over an area of secondary mining at Roadside South Mine in 10 West and could be related to subsidence in the area. 1995 Annual Subsidence Report June 10. 1995 — Subsidence inspection — Subsidence cracks were found in two locations. The cracks were located at the Roadside South Mine over 9 West and 11 West. The crack located over 9 West was evident across the top of a ridge for a distance of apprx. 200'. The crack was typically 3 -6" wide and had a visible depth of 2 -12 ". The shallow depth indicated partial healing. The crack over 11 West was evident across the top of the ridge for a distance of 35'. The 1 -2" crack was visible in the surface shale but was not visible in the sandstone. 16. A description of results achieved: Acres submitted for Phase I release (9.1 acres) • The CRDA #1 access road was graded to approved final contours by placing stockpiled refuse on top of pile in 2' lifts and compacting to 90% of the maximum dry density of the material. Cover material that was previously scraped and stockpiled and additional material from Topsoil Pile #4 was spread to a depth of 20" on finished grade. The 30" CMP was removed and disposed of and replaced with a section of riprap ditch connecting the Northwest and Southeast Collection ditches. After cover and topsoil was place the surface was extensively roughened to provide for increased moisture retention and favorable micro sites for plant establishment. The area was Hyrdo and Broadcast seeded, mulched and tackified. • Cameo Borrow Area #1 Sump — material was pushed in from bank and additional material was hauled from Topsoil Pile #1 to fill in the sump. The area was graded, drill seeded, mulched and crimped. • Pond 11 — Material to fill Pond 11 to final grade was taken from the east bank of the pond and hauled in from Topsoil Piles 1 and 14. The area was graded to drain toward Coal Gulch, and was drill seeded, mulched and crimped. • Substation G — All structures and associated power lines and poles have been removed and disposed of. The area was backfilled and regraded to approximate original contours. • Pond 13 — All discharge structures were removed and disposed of. Material to fill Pond 13 was taken from the south bank and topsoil was hauled in from Topsoil Pile #1. The area was graded, drill /hydro seeded, mulched and crimped /tackified.