Laserfiche WebLink
below the standard (25 ug/I). Unfortunately, the detection limit used by the laboratory for silver (total <br />recoverable) was 10 ug/1, significantly higher than the standard (.1 ug/I). <br />With respectto Colorado Departmentof Health (CDOH) receiving stream standards (CDOH, 1983, <br />revised 1986), Tuttle and Calamity Draws lie within the Stream Segment 12 of Region 10 ofthe San <br />Miguel River. Because the listed parameters (physical and biological, only) are not applicable to <br />both Tuttle and Calamity Draws, the nearestsegment (downstream) in which applicable standards <br />have been promulgated (Segment 5) are used to compare surface water quality of Calamity <br />(SW-N103) and Tuttle Draws (SW-N3, NPDES 001 and NPDES 006). <br />Exceedences were observed atthree sites: 1) iron at San Miguel #1 (downstream ofTurtle Draw); <br />2) zinc and manganese at SW-N103; and 3) nickel at NPDES 006. <br />Based on the rigorous comparisons made, it is evident that water delivered by the West Lateral <br />Irrigation Ditch is ofsufficientquality fordrinking water, agricultural use and livestock drinking water. <br />This water originates from the San Miguel River upstream of Naturita, and is currently the primary <br />source of water in the vicinity for the previously mentioned uses. Surface water in Calamity and <br />Tuttle Draws, as well as the monitored tributaries, is not suitable for use as a source of drinking <br />water. WFC has knowledge of irrigation being conducted using waterfrom Calamity (Mr. Mel Statts, <br />south of WFC Permit Boundary and bordering Calamity Draw). However, all surface water <br />monitored at sites established in the New Horizon 2 area fall into suitability criteria for livestock <br />drinking water and irrigation. Livestock and wildlife commonly use Calamity and Tuttle Draws as <br />sources of drinking water. As long as the Colorado Co-operative Company continues to operate <br />the ditch system, there will remain a sufficient supply of water well suited for domestic (drinking), <br />agricultural and livestock use. <br />EFFECTS OF MINOR REVISION-52 ON THE HYDROLOGICAL MONITORING PROGRAM <br />Pursuant to the successful application for bond release on much of the New Horizon I mine area, <br />effective November 2001, the following water monitoring sites were abandoned as per Minor <br />Revision (MR)-52: <br />(Revised 10/17/07) 2.04.7-36 <br />