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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />000846 <br /> <br />Project will have minimal effects to the water quality of the Animas River. Concentrations <br />of trace elements in the river are predicted to increase by 2 to 3 percent. There is the potential <br />for product spill if one of the gas pipelines in Ridges Basin is converted to a petroleum <br />products pipelines. <br />a) A voidance/Minimization: <br />i) By Design: <br />(1) Durango Pumping Plant: <br />(a) The pumping plant will be designed to allow for the continued unrestricted <br />movement of groundwater on the site. Groundwater levels and quality will be <br />monitored at a series of wells on the site as agreed with the Department of <br />Energy and the State of Colorado in conjunction with Reclamations restricted <br />use plan for the site. <br />(b) The pumping plant will be designed to minimize the disturbance of <br />contaminated materials, See 13) Hazardous Materials for additional <br />information. <br />ii) General Construction: <br />(1) All Project Facilities: <br />(a) During construction of project facilities a program will be put in place using <br />requirements in permits and best management practices (BMP) to reduce, <br />minimize or eliminate temporary, short term sediment loading to water <br />bodies. <br />(b) Stockpiles of fill materials will be placed above ordinary high water marks <br />and protected to prevent erosion of those materials into the waters of the <br />United States. <br />(c) Silt screens or other appropriate methods will be used to confine suspended <br />particulates and turbidity to small areas where settling or removal can occur. <br />(d) Contractor and subcontractors shall comply with all applicable Federal, <br />State, and local laws, orders, regulations, concerning water quality and <br />comply with all terms and conditions of applicable permits. If there is a <br />conflict between Federal, State and local laws, regulations, and <br />requirements, the most stringent shall apply. <br />(2) County Road 211 (CR 211): <br />(a) Road drainage would be maintained as necessary to keep drainage facilities <br />functional and to prevent unacceptable environmental damage (i.e., rill and <br />sheet erosion and mass failure). <br />(3) Durango Pumping Plant: <br />(a) Measures will be implemented to time construction activities of features in the <br />river to periods of low flow and measures to capture sediment will be <br />employed. <br />(b) The duration of placement of fill materials in the river will be minimized to as <br />short a period of time as practicable to reduce the duration of turbidity. <br />(c) Temporary cofferdamslberms will be used to contain fine materials and <br />placement of fill materials. <br /> <br /> <br />10 <br />