2013-09-18_PERMIT FILE - M2013064 (8)

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Exhibit G — Water Information b) POST RECLAMATION IMPACTS have been minimized. i. As reflected in the comments which follow, the operation has sufficient water to leave the resulting basin in an unlined state, negating the requirement to line the basin for purposes of augmenting for evaporative loss. This satisfies any costs for lining the basin since lining the basin is optional and strictly a burden of the operator to pursue to liberate his water from the unlined state. ii. The AWES report of 27 June 2013 evidences that there will be no measurable impacts of either shadowing or mounding if the resulting basin were lined. The operation therefore includes lining of the basin as an optional phase of the reclamation of the resulting basin. Satisfaction of Colorado State Standards as to the integrity and functionality of the resulting lined basin will be made in cooperation with the Colorado Division of Water Resources, and any resulting submittals and approvals made available to the OMLR at the time of the Annual Report, or by separate cover. Whether the basin is lined or unlined, no measurable impacts to the prevailing hydrologic balance are foreseen. iii. The Flow Technologies Report of 2 September 2013, provides a plan of modified basin design to be incorporated into this submittal as a means to minimize erosion of the basin berms while optimizing the integrity of the basin from the Cache la Poudre River during a 100 year flood event. iv. Addendum to the Flow Technologies Report, above; find overflow protection design specifications of 30 August 2013, as determined by Varra Companies, Inc., Brad Jones, P.E. (2) (a) Please refer to Exhibit C -1: Existing Conditions Map. (b) The known aquifer under the site is the stream alluvium. (c) Discharge water will be dissipated with hard surface riprap or established grassed waterways. Other waters are retained by internal pit drainage, directed by vegetated berms or established waterways or through the maintenance or establishment of a stabilizing cover of vegetation, or as otherwise established under an approved Colorado Department of Health stormwater permit and /or stormwater discharge permit. (3) The three components of the project water requirements are water removed with the product, dust control, and evaporation from exposed ground water. Dust will be controlled using truck sprinklers, and the estimated frequency is one load per day. At 2,500 gallons of truck capacity, the annual demand is 2.80 acre -feet. After the water table is encountered, the water removed with the estimated 800,000 tons of product is 23.56 acre -feet per year. The estimated net evaporation is 2.52 feet per year. At the maximum potentially exposed ground Varra Companies, Inc. Varra- Coulson Resource Project 2 OMLR 112 Permit Application 8 August 2013