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Savage and Savage Environmental <br />P,-3d1Cj1501 /tio/7s foP enVi-0J7m,-06?1 issues <br />4610 Haystack Drive 970 674 8080 telephone <br />Win$or, Colorac o 80550 970 674 8088 facsimile <br />savagea ndsavageOea rth I i n k. net <br />October 21, 2016 <br />Rob Zuber P.E., Environmental Protection Specialist <br />Colorado Division of Reclamation, Mining & Safety <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />Re: Phase III Bond Release (SL -05), Carbon Junction Mine (CDRMS file C-1992-080) <br />Response to CDRMS Adequacy Letter <br />Dear Rob: <br />In response to your adequacy items, we would like to provide the following information. <br />Item 1: Defined ditch at the bottom of the North Pit Road <br />During the operational period of the mine, water from the North Pit Road was directed <br />along the Ewing Mesa Road via ditch to sediment pond #2. With reclamation, the ditch <br />was reclaimed and North Pit Road drainage was directed to the Carbon Junction Channel <br />through surface sheet runoff, via the short section of roadside ditch/swale below the <br />road. This worked well until recent significant storm events around 2014 caused washout <br />at the lower terminus of the North Pit Road. The repairs to the North Pit Road included <br />the construction of berms to slow runoff along the road, reshaping the roadside ditch <br />along the North Pit Road, and constructing berms and a runout area at the base of the <br />North Pit Road above the Carbon Junction channel to facilitate sheet flow, and slow and <br />spread the surface water runoff while directing said runoff water to the Carbon Junction <br />channel above the culverts. This work has stood up to the heavy precipitation events in <br />2015, so this solution is successful to date. Last year's erosion at the point of discharge <br />of North Pit Road runoff into the Carbon Junction channel was due to water undercutting <br />less competent material. C&J excavated and replaced gravel and cobbles in the area in <br />August 2016 to reinforce the discharge area which should alleviate the concern. <br />Item 2: Excavation and Swale near the ditch that flows into Sediment Pond #1 <br />There is some confusion as to the feature that you are referring to in this comment. There <br />is no longer a ditch that flows into sediment pond #1. We observed what appeared to be <br />