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.- • The water management plan eliminated sampling H-2 for the third and fourth quarters. METHODS- During quarterly visits to each station, flow measurement were made using a Teledyne-Gurley Model 622 current meter. Measurements were made by stretching a 100 foot tape across a surveyed cross section of the creek and utilizing the USGS six-tenths depth method. During high flow periods when the stream cannot be waded, the culvert width and water depth are measured. Velocity is then estimated by timing objects over a known distance. In the office, cross sections were drawn to assess changes in stream bed configuration and flows were calculated. During samplings for water quality, measurements for temperature, pH and conductivity were made utilizing an Orion Research Model 399A portable pH meter and Hack Model 16300 portable conductivity meter. Prior to field sampling, meters were calibrated with known standards. All other parameters were collected in precharged bottles and submitted to Bookcliffs Laboratory in Steamboat Springs, Colorado, Chemtech Laboratory in Salt Lake City, or Core Laboratories in Paonia, Colorado for analyses. Methods of analysis were consistent with EPA standard testing procedures. RESULTS: Results of all surface water measurements made during 1986 are contained in Table 2. A summary of major chemical parameters and flow is presented in Table 1. Graphs of major chemical parameters are included in Figures 1.1 to 1.6. Flow data collected at surface stations on Hubbard Creed indicates a range of 14,800 to 51,340 gpm during the months of June and March, respectively. High flows recorded during March were the result of rain and snow melt runoff in the drainage basin. Flows decreased throughout the summer and remained fairly constant to the year end. Surface water chemistry was observed to be stable over the two stations. The water is basically calcium bicarbonate in nature. Suspended solids were high during March and September which may be due to runoff conditions and precipitation events. Total iron was also higher than normal during September, but not the highest since monitoring began. Mining operations at the Somerset Mine appear to have had little or no effect on quantity of Hubbard Creek. During 1986, a small . discharge occurred from outfall point 005 which is the discharge point to sedimentation pond #10 in the Elk Creek facilities area. All NPDES forms filed with the Department of Health are contained in Appendix 1.