2013-01-29_PERMIT FILE - C1981022A (3)

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Sarime - 2.05.4 1986-1987 - Degazsification wells B-4, B-5, B-7, and B-8 were plugged and sealed, the water • tank demolished, and associated surface areaz reclaimed. Borehole B-6 was converted to a ground water monitoring well and will be reclaimed when no longer needed for monitoring 1994 -The above ground facilities, including concrete foundations, were demolished and resulting demolition debris (except for the concrete rubble) removed from the site for disposal. Excavated material was placed against steep slope areas. Riprap was placed in the reclaimed Bear Creek channel to pertnanently stabilize the channel 1995-1996 -Concrete nibble from the 1994 demolition operations placed within the limits of the fill was covered with at least two feet of non-toxic material. The area waz graded to final contour. The culvert in Bear Creek providing access to the former escapeway was removed for off-site disposal and the affected portion of Bear Creek was graded and temporarily stabilized. Graded surface disturbance areas were prepared for seeding, fertilized, and seeded in accordance with the revegetation plan outlined in Exhibit 2.04-E6, Vegetation Information. Reclamation Costs - A summary of estimated cosu for complete reclamation of the Bear Creek facilities area is provided in Exhibit 2.03-E3, Insurance and Bonding Information. Lower Hubbard Creek Atea (Somerset Mine) -The Lower Hubbard Cmek facilities included the Lower Hubbard Creek portals, ventilation fans, an emergency mine hoist and a coal mine development waste pile. Demolition and Final Grading -All equipment, buildings, and above ground stmctures have been • dismantled and removed. All concrete foundations have been removed, mbblized, and placed az backfill or left in-place and covered. All nrbblized concrete fill or m-place foundations have been covered with a mimmym of 2 feet of suitable non-combustible and non-toxic fill material. Demolition debris rem~~ning after dismantling and removal of the surface stmttures and equipment did not include any noncoal materials az described in Rule 4.11.4. The two Lower Hubbard Creek portals were sealed in accordance with applicable provisioru of Rule 4.07 (az shown by the Figure, Typical Cross-Settion -Mme Seals, in Exhibit 2.05-E5, Reclamation Details). Sohd block or seals were constructed a minunum of 25 feet in from the portal surface openings. The portal entries were then backfilled from the seals to the portal openings with soil and broken rtxk materials and portal and face-up areas were backfilled and graded to completely cover all portal structures, establish a stable slope configuration, and eliminate exposed 6ighwall areas. Limited backfilling was required against the highwall az this area was already stabilized. Backfill material was salvaged from the edge of the pad adjacent to Hubbard Creek The pre-law refuse pile was not re-disturbed and will not be reclaimed. Final grading of backfilled and other disturbance areas was completed to cover the portal structures and azsociated facilities pad. The short section of Hubbard Creek that was affected was regraded and stabilized with riprap. Straw bales were placed along the edge of the facilities pad during and following backfilling and grading activities to minimize sediment contributions to the creek The final topographic configuration of the Louver Hubbard Creek facilities area is shown by the Hubbard Creek reclamation plan drawings included in Exhibit 2.05-E5, Reclamation Details. The pre-disturbance land use for this area was undeveloped land. The affetted lands have been reclaimed consistent with undeveloped public use lands in order to maintain public access to pubhc lands to the north and ease The affected portion of the Hubbard Cmek road and the azsociated • culvert have been retained to provide continued public access to the nearby public trailhead area. Soil Replacement -Topsoil was not recovered or segregated during the construction of the Lower Hubbard Creek facilities. Soil materials were rrrixed with and incorporated into other surficial and PR04 2.05-53 Revised August 2000