2200-11-30_GENERAL DOCUMENTS - C1981015

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Colorado Division roject of Reclamation, Mining & Safety Construction Summary Cont. Fruita Mine Project, continued... of the slope. Excavation and placement of the channel required - ; side slopes no steeper than 3H:1 V, eight (8) foot bottom using _ A t4#1 rock available on site. The equipment utilized existing roads and , r all areas were revegetated upon completion. "' The mine portal area backfill extends up against a sandstone outcrop. Water from the Bookcliffs was draining into the portal _ ti backfill and creating an opening between the sandstone and fill x, material. The area was excavated revealing an opening in front of ' _ the bulkhead seal approximately 30 feet wide by 35 feet deep. , w Layers of Polyurethane Foam(PUF) and rock were used near the portal entry to act as a seal and prevent water from migrating into the portal. The portal was then covered and compacted with fill to the original grade surface. Lastly, a large rock apron was placed on top of the fill to direct surface water flows into the The main drainage channel down the fill was extended an constructed drainage channel. additional 250 feet and several rock check dams were installed. Additional rock channels were constructed on the northern _ - ' drainage, the confluence of the two drainages and the road �'�`� �"� 1 ' � - drainage using rock available on site. A number of rock check - Jr dams were installed by hand on the south side of the fill and the "{4 main access road to address rills and gullies. Rock check dams were also placed below the reconstructed channels to further WSJ.ti-y� protect the channel during high velocity storms. A total of 555 .. • , feet of rock lined channel and 34 rock check dams were installed ,: _ ;" .. on site during this project. ` ` - r►' r�. The sediment pond at the base of the mine is to remain on site to promote wildlife habitat. The primary spillway was plugged with concrete and removed and the emergency spillway was armored with rock. Eleven (11) Tamarisk trees (a noxious weed specie in Colorado)were excavated and removed from the pond. Additional rock armoring was performed(north channel above)and in several other locations. All disturbed areas were roughened, seeded, fertilized and mulched.The project was completed on April 17,2009. Prosect Data Change Orders Fruits Project:Maintenance on the former Fruita No,1&No.2 mine site Change orders were issued to riprap additional channels, add more rock check dams, remove tamarisk a noxious weed and OSM Civil Penalty Grant#:S07AP12427 reseed newly disturbed areas. Additional change order were Change Order#1: $0.00(No Net Change) issued extending the completion date due to adverse winter weather conditions. Change Order#2: $10,185.00 Total Project Cost: $33,745.00 Future Monitoring and Maintenance Additional revegetation efforts will take place in the Fall of 2009 where vegetation in site is sparse.