Laserfiche WebLink
water discharged .from the Seneca II Miae is not used directly for irrigation. . <br />Indirectly, although, water discharged from the mina ie significantly diluted by <br />water from eithei Fish Creek or the Yampa River before it ie diverted and used <br />for irrigation. No irrigation exists oa Grassy Creek below Seneca II. Due to <br />the relative amount of dilution by additional water from both sources, the <br />ambient water qualities o£ Fieh Creek and the Yampa Aiver are the flominant <br />factors is determining their suitability for irrigation, water discharged from <br />the Seneca II Miae ie, however, used for livestock watering. <br />Surface water Sunm~ary. Nearly normal rainfall sad snowfall values resulted is <br />nearly normal discharge values this year. TDS values at NPDES 604 sad 008 era <br />increasing at a moderate rate while TDS values at NPDE9 002 aIId 003 are <br />increasing slightly. Oa lower Grassy Creek (SSG2), TD3 values display a stable <br />tread. Of the nine eDoil springs monitored, five are exhibiting decreasing HC <br />treads, while one displays a stable EC tread. Discharges are normally suitable <br />for livestock, but sometimes exceed water quality standards for irrigation. No <br />exceedeaces o£ NPDES effluent criteria (Permit No. CO-0000221) occurred this <br />year. • <br />References <br />American Public Health Association (Ed.). 1985. 'Standard Methods for the <br />Hxaminatioa of Water sad wastewater', 16th Edition, waehingtoa, D.C. <br />Brakeasieh and others. 1979. "Field Manual for Research in Agricultural <br />Hydrology". <br />Buchanan and Sumera. 1968. 'Stage Meaeuremeate at Gaging Stations". <br />Colorado Dept, of Health. March 1999. "Regulation No. 31, The Basic Standards <br />and Methodologies for Surface wetar^ <br />Colorado Dept. o£ Health. March 1999. `Regulation No. 01, The Basic Standards <br />for Ground water^ <br />• <br />20 <br />