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<br />~) <br /> <br />~ <br /> <br />TASK El0.0 HOURLY STREAMFLOW RECORDS <br /> <br />Purnose: Obtain and analyze available data from the USGS for continuous stage recording gages <br /> <br /> <br />previously operated on or near the Gurley collection system with the objective of better <br /> <br /> <br />defining diurnal fluctuations in streamflow produced by snowmelt runoff. Obtain and review <br /> <br /> <br />operating records for the Gurley system for the coincident period of record to assist in <br /> <br /> <br />interpretation of streamflow data. <br /> <br />Methodolo..v: Diurnal fluctuations in streamflow produced by snowmelt runoff may have a significant effect <br />on the operation of the proposed modifications to the Gurley collection system. To better <br />assess the potential magnitude of the dirunal fluctuations and devise operational and structural <br />plans to capture available runoff, hourly streamflow data from the study area will be analyzed. <br />It is understood that USGS records from continuous stage recording gages on West Beaver <br /> <br /> <br />Creek (09172800), Gurley Ditch (09172700), and Beaver Creek near Norwood (09173000) are <br /> <br /> <br />available. This data will be obtained and analyzed. Operating records obtained from the <br /> <br /> <br />Gurley system will be reviewed to assist in the interpretation of the streamflow data. <br /> <br />The following work items are included in the hourly streamflow record task.: <br /> <br />E.I0.l Data Collection and Reduction - Obtain from the USGS the available strip charts and station <br /> <br /> <br />analysis books for the gages on West Beaver Creek, Gurley Intake Ditch, and Beaver Creek <br /> <br /> <br />for the coincident period of record (1976 through 1980). The CWCB will assist in <br /> <br /> <br />coordination efforts with the USGS to facilitate the timely acquisition of required data. <br /> <br />23 <br />