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<br />. <br /> <br />. <br /> <br />.' <br /> <br />South Fork Mesa Creek Estimated Stream Flow <br /> <br />7 <br />6 <br />5 <br />.sa 4 <br />u 3 <br />2 <br />1 <br />o <br /> <br /> <br />~1-- ^'~ ~-'? -1~ ~ J- (/v1-- (/4- -1vO O'~ 00;. 1--0~ <)~O <br /> <br />Month <br /> <br />Table 2 shows that the summer recommendation of 2.0 cfs is available at least 50% of the time <br />from April 1 st through May 31 st. Table 2 also shows that the winter flow recommendation of <br />1.25 cfs is only available at least 50% of the time March 1st through March 31 st. The winter <br />recommendation was reduced to 0.3 cfs for the time period of June 1 st through February 29th <br />based on limited water availability. <br /> <br />BLM staff also conducted numerous on-site flow measurements as part of its water quality <br />monitoring efforts. These measurements were taken approximately one mile upstream from the <br />confluence of the South Fork and North Fork, approximately one mile downstream of the <br />proposed instream flow reach. During the 1979 to 1984 period, BLM took 11 flow <br />measurements during the spring and 11 flow measurements during late summer. The median of <br />the spring measurements was 13.2 cfs, while the median for the mid-summer measurements was <br />0.2 cfs. Due to concerns about water availability expressed by the Division Engineer, BLM <br />conducted a short gain-loss study in October 1998. This study confirmed that South Fork Mesa <br />Creek is a losing stream. <br /> <br />Precipitation Data <br /> <br />Staff reviewed local precipitation data sets from 4 different sites located around the Mesa Creek <br />Drainage (see Precipitation Data in Appendix C). These sites include Paradox 2 SE (1941- <br />1977), Gatway 4 NE (1947-1999), Delta (1893-1999) and Montrose #2 (1885-1999). Table 3 <br />shows the water year and the percent of average precipitation recorded at each site. <br /> <br />- 5 - <br />