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J <br />1988 = 0.180 cfs " <br />1987 = 0.110 cfs " <br />1986 = 0.294 cfs " <br />1985CY (Calendar Year) = 0.357 cfs " <br />1984CY = 0.447 cfs " <br />1983CY = 0.154 cfs (reservoir did not completely <br />fill until March 7, 1983) <br />This year's average flow value, 0.04 cfs, is 84% lower than the historic <br />(1983-2015) average flow value, 0.250 cfs. The timing of when flow <br />values are collected affects these averages. Flow values from Pond 004 <br />have also been affected by the reduced diameter of the discharge culvert <br />modified on May 29, 1987 (36 -inches to 6 -inches). In August 2005, the <br />discharge culvert was replaced with an 8 -inch diameter plastic culvert <br />set approximately one -foot above the previous elevation. On August 20, <br />2015, the old Parshall flume was replaced with a new 2 -foot H -flume. <br />Review of the TDS plot indicates an increasing trend, however the peak <br />value occurred in September 2005, therefore it appears to be <br />stabilizing. <br />Surface Water Site SW -S2-10 (SSC10). <br />This site monitors Cow Camp Creek below Pond 004 at its confluence with <br />Fish Creek. It is normally monitored in June and July on a monthly <br />basis. This year it was sampled in June and July. This site usually <br />dries up in late summer, a though NPDES4 upstream flows continuously. <br />The reduction in flow is due to stream channel infiltration, <br />evapotranspiration and the absence of lateral inflow from tributaries to <br />Cow Camp Creek. The TDS plot reveals an increasing trend. <br />Little Grassy Creek Drainage. <br />Two monitoring sites lie within the Little Grassy Creek drainage: SSLGS, <br />located in the upper part of Little Grassy Creek, and NPDES Discharge <br />Point 002, also known as the Wadge Impoundment or Pond 002. <br />13 <br />