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Environmental Assessment <br /> 2.1.4 Road Improvements to CR 120 <br /> The road improvements to CR 120 will be performed by GCC in conformance with all County standards <br /> and specifications in effect at the time of commencement of construction including,but not necessarily <br /> limited to those standards and conditions set forth in Section 82-161 and Chapter 74 of Subpart B of the <br /> LPCC, and in accordance with detailed plans and specifications of the proposed road improvements <br /> submitted to and approved by the LPC Engineer. There is no federal decision to be made by either <br /> OSMRE or BLM with regards to road improvements to CR 120. The regulatory decision that authorized <br /> GCC's use of CR 120 for coal hauling was part of LPC's Class II LUP process (refer to Sections 1.1.3 <br /> and 2.1.3). <br /> As described in Section 2.1.3,the RIA, among other things, defines construction phasing,timing, and <br /> associated hauling allowances along CR 120. The phasing and timing of specific road improvements is <br /> included in the RIA that is publicly available for review from LPC and has been made a part of the <br /> Administrative Record for this EA. <br /> The road improvements include temporary paving in front of several residences, realignment of specified <br /> road sections,widening specified road sections, regrading and paving specified road sections; and <br /> reconstruction of the existing portion of paved road. By the completion of Phase 5 road improvements, <br /> the entire approximately 6.5 miles of CR 120 from SH 140 to the King 11 facility would be paved and in <br /> conformance with LPC road design and safety standards (LPCLUC Sec 74-91.c.d.). <br /> Table 2-5 summarizes the anticipated new ground disturbance along CR 120 anticipated from <br /> implementation of the RIA. Because the road improvements are incremental over a 5-year period, and <br /> dependent upon the LPC Engineer's approval of proposed engineering design and construction plans, <br /> exact locations of future ground disturbance are not precisely known. For analyzing potential impacts to <br /> environmental resources along the existing CR 120 alignment,the following conservative ground <br /> disturbance assumption is made. <br /> Table 2-5.Anticipated new ground disturbance from CR 120 improvements <br /> b. <br /> Exist f. <br /> Estimated C. d. e. Approximate <br /> a. Average Width of Length of Length of Area of Approximate <br /> Reconstructed Road Disturbance Road Road Disturbance Acres of <br /> Roadway Width (feet) Improvements Improvements (square feet) Disturbance <br /> Width (feet) (feet) (a.—b.) (miles) (d. * 5,280) (c. * e.) (f./43,560) <br /> 30 24 6 6.5 34,320 205,920 4.7 <br /> DOI-BLM-CO-S010-2011-0074-EA <br /> September 2017 <br /> -41- <br />