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Loru+run Ccm a; l(<nt - Surrncr '~1'crcr T±cl;ruia! Rmars <br />• <br />of this spring appears to be a coal member. This coal is above the Primero but below the Ciruela. <br />Spring SPAC-1 in Alamosa Canyon is an alluvial spring that +vould appear [o be the result of <br />discharge of the losing stream from above. <br />Surface Water Ponds <br />In addition to the springs, seeps, and streams. ponds are also present on the site. These ponds are <br />utilized to provide water for livestock and wildlife at the site. A total of nineteen ponds were <br />located by ground and aerial surveying methods (ivlap 2.04.7-1). A large number of these ponds <br />(eight) are located in the Cow Canyon drainage. The other ponds are scattered over the site, with <br />generally no more than two in any drainage. All ponds located appear to be artificial. with man- <br />made dams at one end. Water level in the ponds varies from season to season depending on runoff <br />received in the drainases, however. all ponds consistently hold water. Water level data for all <br />pond sites is contained in Appendix S~V-3. <br />Flow, Crest, and Storm Events <br />The United States Geological Survey (USGS) (Crowfoot, 1996) has operated two surface water <br />~a~ine stations on the several vicinity of the site: site 07124050 at Stonewall. Colorado, on the <br />• Middle Fork of the Purgatoire, and Si[e 07124200 a[ Madrid. Colorado, on the Purgatoire <br />mainstem. The Stonewall site is located approximately 13.3 miles upstream and drains X7.1 <br />square miles. The Madrid site is located 8.6 miles downstream from Lorencito Canyon above the <br />Trinidad Reservoir and drains ~0~ square miles. Numerous perennial, intermittent, and ephemeral <br />streams drain into the Purea[oire benveen these two sites. <br />The Stonewall station was monitored between 1978 and 1981, while flow at Madrid are available <br />from 1972 to present. During [he period of record, flow at Stonewall ranged from 2.8 to X22 cfs. <br />while flow at Madrid ranged from 3.0 to 1640 cfs. The minimum monthly low flow for [he <br />Madrid site is 5.8 cfs, and it occurred in February, 1977. <br />The permit area is bounded on the east by the upper limits of the intermittent Lorencito Canyon <br />watershed, on the north by the perennial Purgatoire River, and on the west by the perennial South <br />Fork of the Purgatoire River. The tributaries drainine into Lorencito from the mouth upstream <br />consist of Little Jeff Canyon, Jeff Canyon. Coyote Canyon, Puertecito Canyon. Little Pine <br />Canyon, Bonita Canyon, Chimney Canyon. Alamosa Canyon. Pancho Canyon, and Oso Canyon. <br />These side tributaries are predominantly ephemeral. Lorencito, Cow Canyon and the South Fork <br />of the Pursatoire are tributaries of the Pureatoire River. General characteristics of the watersheds <br />within the permit area can be revie+ved in Table S~V-4. <br />Flow dart was collected from each of the monitoring stations (Alap ?.04.7-1) monthly during the <br />. 1996 baseline period. Flow were determined from measurements of the depth of the water in the <br />.u 17i'Dr¢mhcr+. I`Np 13 (revised 6130/97) <br />