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~J <br />and any flowing sections are limited in size by the gradient of the drainage <br />channel, the width of the incised channel and [he proximity to ahead cu[. These <br />headcuts are usually 2-3 Feet high and produce a flowing section of Che accumu- <br />lated seep volume ranging from 2-3 inches [o a maximum of 3 feet in No-Name <br />Gulch. <br />There are a number of ground water seeps and springs within the proposed mine <br />area that provide freestanding water for vegetation, for wildlife and could sup- <br />port. macroinvertebrates. For the most part, these sites do not extend more than <br />about 30 feet from the source. Some do flow for considerable distance before <br />being lost to riparian vegetation, infiltration and evaporation. These are found <br />in the longer and deeper incised drainages that continual interflow from more <br />seeps permit continued recharge and therefore existence as surface water. Most <br />of the seeps and springs with a persistent discharge have been converted years <br />ago into livestock tanks (watering ponds) by ranchers or grazing permittes. With <br />few exceptions, these tanks have become the terminus of any surface flow from <br />• these sources. <br />The monitoring sites selected for this study and the sections of the drainage <br />networks surveyed for flow status are shown in Map M44. As shown, the sections <br />with any flow are short in length, ranging from 200 feet to 1,000 fee[ and there- <br />fore any macroinvertebrates collected are most representative of a point source <br />not a zone or habitats such as one would find along a creek, brook or small <br />river. <br />LJ <br />J-3 <br />