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Revised April, 1984 <br />• precipitation and evapotranspiration rates, watershed elope, soil <br />type, configuration and vegetative cover, and tine of year. Surface <br />runoff from undisturbed and disturbed areas ezhibit broad ranges is <br />concentrations of dissolved and suspended constituents. CYCC has <br />conducted a comprehensive baseline sampling program in the proposed <br />permit area, the results of which are reflected in Table 29, Surface <br />Sister Quality Data. <br />Seasonal Variations in Discharge <br />Surface water flow data for the proposed persist and adjacent <br />area collected by the DSGS, and CYCC have been assimilated and <br />analyzed to demonstrate seasonal variations. Data on mean daily <br />discharge were reduced to mean monthly discharge in cubic feet per <br />• second for tw gaging stations: DSGS Gaging Station 09243900 on <br />Foidel Creek upstream from Mine No. 3, and DSGS Gaging Station <br />0924700 on Middle Creek upstream from Hine No. 3. These data are <br />listed in Table 27, DSGS Stream Monitoring Data. Seasonal <br />variations in discharge for all three streams are shown in Figure 7, <br />Stream Flow Hydrographa. Seasonal variations in streamflow are <br />readily apparent from the hydrographe and are described below. <br />Foidel and Middle Creeks both start their flow period in March <br />when snowmelt occurs. The period of March through June is the <br />season of the heaviest flow, when the combination of anowmelt and <br />rainfall yield high runoff volumes in ezcesa of 10 cfa. In July, <br />. the runoff decreases rapidly to near zero, and by mid-July the <br />2.04-49a <br />