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Ridgway Reservoir Micro-Hydro Project Loan Feasibility <br />Page 10 of 42 <br />HYDROLOGY <br />Daily reservoir release data from November l, 1986 to July 31, 2010 were reviewed to determine <br />daily, weekly, monthly, and annual pattern of expected generation under average, wet, and dry <br />hydrological conditions. Over that period of record, daily releases have averaged 195 cubic feet <br />per second (cfs). The largest release was 1,150 cfs, which occurred during the last 6 days of June <br />1999. The lowest release was 30 cfs, which occurred from October 22, 2002 through Apri125, <br />2003. Minimum, average, and maximum monthly flows are shown below. <br />n�r, <br />�tJO <br />: (l0 <br />fiQCl . __. <br />� <br />� <br />; saa <br />ars <br />� <br />� 4(30 <br />� <br />3CJ0 <br />� p�j <br />'100 <br />� <br />Monthlv Discharges from Rid�wa�Reservoir <br />� <br />J��n F��'t� N1�r r'�pr Pv4,-+y� J��n ;�,I r�,u�, Se�p D�t N��.� G���� <br />ENVIRONMENTAL ISSUES <br />�ti�t't�<i�f-� <br />■ PJl.3%It111�r11 <br />Pr1ii�irn�..mi <br />Reclamation concluded in 1979 that development of the proposed faciliry would have little <br />impact on the local or regional environment. Nothing has changed to alter this conclusion. The <br />project will be located completely within the area already affected by construction of the dam <br />where sensitive habitats do not exist. Operations of the reservoir will not change, so impacts to <br />channel morphology, ravine habitats, downstream water uses (including recreation and <br />irrigation) or biological species using the river would not be expected. The District is currently <br />