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Alternative A; Because no additional surface or underground disturbance would occur under the No-Action Altemative, existing vegetation resources would not be disturbed or impacted. No impact. Signature of specialist: Amanda Clements WASTES, HAZARDOUS OR SOLID ffect Environment: Various waste materials, including trash; used equipment parts, conveyor belting, and cable; waste oil, mine development waste; and waste (low grade or contaminated) coal are generated in conjunction with ongoing mining operations. Oxbow has established procedures for handling, storing, and disposing of these waste materials to assure ongoing compliance with all applicable regulatory and permit requirements. No designated hazardous materials or wastes are utilized, stored, or generated by the active mining and related operations. Environmental Consequences & Mitigation: P o o e ti n• The proposed action would result in leasing and subsequent mining of additional coal reserves, therefore, the life of [he ongoing Sanborn Creek mining operations would be extended by approximately 3 to 4 months and any waste generation associated with ongoing mining operations would continue for the duration of active mining. In addition, development and mining of the additional coal reserves would generate additional quantities of mine development waste. Based on an annual projection of 5,000 cubic yards of development waste, implementation of the development and mining associated with the Proposed Action would result in the generation of approximately 800 to 1,700 cubic yards of additional development waste material. Oxbow has designed and permitted with the CDMG waste disposal facilities with adequate capacity to accommodate the incremental development waste volumes that would be generated by development and mining of the additional coal reserves. Design, construction, operation, and reclamation of the waste disposal facilities is regulated and monitored on an ongoing basis by the CDMG to assure continuing compliance with applicable design requirements and permit conditions. Impacts limited to extended duration of existing impacts and generation of incremental development waste volumes which would be handled under existing permitted plans and placed in existing permitted disposal areas. Alternative A: Approval of the No Action Altemative would not result in an extension of the mine life by approximately 3 to 4 months. The incremental quantities of mine development waste that would be generated under the Proposed Action would not be generated under [he No-Action Alternative. Under the No-Action Altertta[ive, mining and related waste generation and disposal activities would continue until the available coal reserves are depleted, with ongoing control, regulation, and monitoring of waste handling, storage, and disposal, as previously described. No impact. Si3rtature of specialist: Jahn Davis WATER QUALITY, SURFACE OR GROUND ffe ted Environment: This area falls within the watershed of the North Fork of the Gunnison River which is part of the larger Colorado River system. The proposed lease modification area is drained by Hawksnest Creek, a small ephemeral tributary to the North Fork of the Gunnison. Ground water occurrence in this area is limited to shallow, isolated perched ground water and a deeper undifferentiated water table system, with ground water occurrence and movement within units and zones corresponding to areas of increase differential permeability. The proposed coal lease modification area does not include any municipal watersheds, National Resource Waters, surface water bodies, or surface or ground water supply intakes or wells. Thr re are two existing livestock/wildlife.rese~v and a spring located near the affected area. Surface and ground water quality in this area are generally good. typically meeting all applicable state water quality 10-