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^ High Tide Line indicated by: <br />^ oil or scum line along shore objects <br />^ fine shell or debris deposits (foreshore) <br />^ physical markings/characteristics <br />^ tidal gauges <br />^ other (list): <br />Mean High Water Mark indicated by: <br />^ survey to available datum; <br />® physical markings; <br />® vegetation lines/changes in vegetation types. <br />(iii) Chemical Characteristics: Characterize tributary (e.g., water color is clear, discolored, oily film; water quality; general watershed <br />characteristics, etc.). Explain: No Water was present in washes during time of survey. The Salt Creek watershed extends 30 aerial miles fi•om <br />the Colorado River in to the Book Cliffs. Topography is relatively flat 14 aerial miles to the base of the Book Cliffs. From the base of the Book <br />Cliffs at 5486 ft., elevations in the watershed exceed 8000 ft. Spring runoff events are associated with snow melt from the higher elevations and <br />snow accumulation below 5500 ft. is minimal and seldom remains as ground cover for more than a few days. The range in elevation of the <br />project area is 4400 to 5200 $. Chemical function is most likely insignificant, however, during severe wide spread precipitation events the <br />washes could conect with East Salt Creek (RPW) and transport sediment and pollutants downstream. The naturally occuring selenium in <br />mancos shale could be transported during these events. <br />Identify specific pollutants, if known: <br />WestWater Engineering <br />Page 19 of 23 COE Jurisdictional Determination Request <br />DBMS 408 <br />