Laserfiche WebLink
r <br /> IV. CONSTRUCTION SUMMARY <br /> Following Notice to Proceed,a large grinding machine was mobilized to the east facilities area site,along with a <br /> track hoe with a thumb. Approximately 7,000 cubic yards of timber slash was run through the grinder,reducing it to <br /> approximately 2"x 4"x' "particles. Rock and dirt were segregated from the slash during the grinding process. It <br /> is estimated that approximately 500 cubic yards of ground chips were created,and 1,318 cubic yards of useable dirt <br /> was segregated from the slash pile. Approximately 30 yards of dried cow manure were delivered to the site. These <br /> materials were mixed in roughly equal amounts,and were spread to a depth of approximately four inches across the <br /> approximately 5.75 acre work area. Weed free straw mulch and 18-46-0 fertilizer(at 300#per acre)were applied to <br /> the ground surface over the organic material,then the area was ripped parallel to the contour using a light dozer with <br /> 15 inch long rippers spaced at 18 inch centers. The rip began to incorporate the organic materials and mulch into the <br /> underlying dirt. Following ripping,the area was drastically scarified using a small track hoe. The hoe created <br /> thousands of depressions in the ground surface, The depressions were approximately 36"wide, 15"— 18"deep and <br /> 24"long. These depressions were constructed virtually shoulder to shoulder. This scarification process completed <br /> the incorporation of the organic materials,and created a land form which is highly resistant to erosion. Seeding and <br /> application of one ton per acre weed free mulch followed. The final mulch was not crimped. <br /> 156 feet of drainage channel was built from the south side of the main road opposite the landslide to the pre-existing <br /> channel. This channel was rock lined,and should convey drainage from the landslide area to the main channel <br /> At the east,central and west facilities work areas,trees and shrubs were planted at the rate of approximately 300 <br /> stems per acre. Trees planted included:rocky mountain Juniper,Gambel's Oak,Narrow Leaf Cottonwood. Shrubs <br /> planted were: Serviceberry,Redosier Dogwood, Skunkbush sumac. <br /> Trash and debris,including many roof bolts used to anchor straw bales many years ago,were removed from the site. <br /> Rebar protruding from a concrete retaining wall located adjacent to the rail road tracks,were cut and removed from <br /> the site. <br /> V. FUTURE MAINTENANCE <br /> An old,previously closed adit has re-opened in the cliff above the central work area. This feature was scheduled for <br /> re-closure,however snow prevented machine access. This feature should be closed in the Spring of 2001, when the <br /> area is free of snow. <br /> Other maintenance may include repair or widening of the inlet to the drainage channel at the east work area,and <br /> noxious weed emergence. <br /> VI. SUMMARY <br /> This Project was intended to improve the overall site reclamation success by creating topsoil,roughening the surface, <br /> planting grasses,forbs,trees and shrubs and by establishing a channel for runoff. <br /> Coal Program vegetation experts should monitor the site for vegetative cover and diversity,as well as noxious weed <br /> growth. <br /> Project Manager Steve Renner <br /> Date 12-04-00 <br /> M:\imp\c l oseout\hawksnest.doc <br />