PERMFILE106919

• Permit No: C1981008A
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: NH1 Tab 18 Hydrologic Reclamation Plan
• Media Type: D
• Archive: Yes

• Plans for sampling overburden and topsoil to identify potentially deleterious materials have been
developed and are outlined in Tab 21 (Minesoil Reconstruction). As previously mentioned,
investigations have determined that no acid or toxic materials will be replaced in the upper four feet
of the regraded spoil (Tab 6, Geology). Surface runoff from reclaimed areas will not come into
contact with materials that would contribute to elevated levels of acid or toxic constituents in the
runoff.
Topsoil handling procedures (Tab 21, Minesoil Reconstruction) and revegetation methods (Tab 22,
Revegetation Plan) have been developed to prevent erosion and minimize the additional contribution
of sediment to runoff. Plans presented in both Tabs include the establishment of topsoil piles,
temporary seeding of topsoil piles, disking, mulching, deep ripping and prompt reseeding of
reclaimed areas.
The Surface Water Control Plans developed for the Nucla Mine mining area (see Exhibits 13-4 and
13-6, Tab 13, Facilities) include five temporary diversions designed according to accepted
engineering design criteria. They were built to minimize erosion and prevent additional contributions
of sediment by limiting flow velocities and tractive forces that cause excessive erosion. All temporary
diversions were removed and reclaimed after mining was completed. Culverts presented in the
Surface Water Control Plans were designed to feature adequate freeboard and ouffall protection
(riprap) to minimize erosion.
• Surface Water Quantity. Sediment ponds, diversions and culverts were planned and located to
control all drainage into, through and out of the Nucla Mine mining area, and to insure that changes
in surface water quantity are minimized (see Exhibits 13-4 and 13-5, Tab 13, Facilities).
Postmining topographies were planned to approximate the original premining contours (see Tab 20,
Backfilling and Grading). Replaced topsoil material will exhibit infiltration rates similar to premining
soils. Reclamation techniques used in the topsoiled areas (disking, ripping, mulching, etc.), in
combination with reestablished watershed topographies minimize excessive rates and volumes of
runoff.
The surface and ground water rights adjacent to the Nucla Mine mining area are listed in Tables 1
and 2 and shown on Figure 2 of Attachment 16-1 to Tab 16. The water rights inventory boundary
includes all water rights within a two mile radius of the Nucla Mine. Attachment 16-1 of Tab 16
(Protection of the Hydrologic Balance) describes the ground and surface water rights in detail.
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