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... ,. ~' .. ~~_ ~.d :qfd . 5. _ . r~ ;:'development .of e:~aonnal~stream channel .(see Map #4). A mine.~t•a,..:_ `~e,~nadYw111~.cross: ~' the realigned channel.by a riprap low water. crossing. This porttothe• task r • es excavating the road, plus ten (10~ feet on each side of the road, a deptli of two (2 feet below stream channel grade and replacing with two feet of riprap (see Map #4). Riprap material for the road crossmg must consist of durable irregular rock have a minimum . D - 50 of 6 inches and D-max of 9 inches.. Riprap will have to be imported. Channel configuration; and limits will be staked by DMG personnel The portion of the haul road below the riprapped crossing shall be re-graded to eliminate a large erosion gully. Width and grade off the road shall not be changed. Task 4 Pond 15-P10 Removal Scone o[work The purpose of this task is to completely remove Pond 15-P10 which is not permitted as a permanent pond. The east, south aad west embanlmnents of Pond IS-P10 shall be removed and incorporated into the north side of the inslope. The resulting new slope shall be graded to approximate original contour. Revegetation shall be according to specifications in section 20.9 of the General Bid Specification, 1993. There will ~be no measurement for payment for Task #4. Payment for Task #4 will be reflected in a lump sum bid under Item 4 on the Bid Schedule. Task 5 - Reoonslrnction of Pond 22-P10 scone of work The purpose of this task is.to construct a new northwest embanlmlent for Pond 22-P10, repair damage to the adjacent haulage road, and install a new culvert under the road. work Description Anew northwest embankment shall be constructed between the haul road and a prominent siltstone outcrop on the southwest side of the existing Pond It will be approximately five feet high by 60 feet in length, .with an 8-foot crest width. Some material for rts construction is avaflable from the Pond, however care must be taken not to damage willows which have become established within the Pond. The majority of construction material will have to be imported, possibly from the Pond 15-P10 or stream realignment areas. Gullies cutting into the road northwest of the pond shall be filled and the road regraded. The existing culvert at Pond 22-P10 will be supplemented with a 36-inch .CPS culvert. It shall be installed adjacent to and at. the same grade as the existing culvert. Estimated length is 50 feet There will be no measurement for Task #5. Payment for Task #5 will be reflected in a lump sum bid under Item 5 on the Bid Schedule. 6