_GENERAL DOCUMENTS - C1981017 (283)

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-47- most practical and most environmentally sound method of revegetation at high altitudes. The applicant has proposed to develop test plots to determine a practical revegetation success standard for the mine bench outslopes. The scope of this research project was worked out in conjunction with the Division. The scope of work can be found in Volume 6, Section III-H of the application. The revegetation plan calls for seeding predominantly native grasses and forbs. Several species of shrubs and trees will be transplanted. Two different seed mixes are planned to be used. The lower elevation mix for use at the preparations plant and rock tunnel consists of 14 grass species, 5 forb species, 8 shrub species, and 4 tree species. All the species in the lower elevation mixture are native. The high elevation mixture, to be used at the 5 mine sites, contains 16 grass species, 5 forb species, 7 shrub species, and 4 tree species. Only one introduced species, Timothy (Pleum pratense) , is included in this mix. Pursuant to 4.15.2, the Division hereoy approves the use of this introduced species for the following reasons: 1 ) This species is •�► necessary to establish quick cover, 2) the seeding rate is low (0.5 lb/acre) , 3) this species is compatible with plant and animal species of the region, 4) this species is not highly competitive at an elevation of 10,000 feet and will eventually be replaced by adapted native species, and 5) this species is not poisonous or noxious. Presently, the seed mix does not, apparently, contain enough forb species to meet the species diversity standard. However, native forbs adapted to the high elevation of the Coal Basin Mines are presently not commercially available. In the future, as more forb species become available, they can be added to the seed mix. In addition, non-seeded native forbs have been observed on many of the reclaimed areas at the mine. As previously stated, the mine bench outslopes will be reclaimed in-place without any topsoil . All other areas to be reclaimed will be topsoiled, with the exception of the roads which will be kept as part of the post-mining land use. All areas will be revegetated by preparing the seedbed, adding fertilizers or amendments, seeding, then mulching. Past revegetation efforts at the mine have been successful. The proposed revegetation plan should result in continued success. Pursuant to Rule 2.07.o(2) (n) and on the basis of available information, the Division finds that the proposed operation will not affect the continued existence of threatened or endangered plant species. The proposed operation is in compliance -,-iith the requirements of this section.