2011-02-14_HYDROLOGY - M1980047 - Laserfiche WebLink

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Richard D. Piland & Associates Hydrology Monitoring Report 2010 Stream Flow Monitoring Data The 2010 Water Year Discharge reports and hydrographs of the five stream flow monitoring station are in Appendix A. There are three graphs for each station; one representing daily flow in cubic feet per second, one representing monthly acre feet totals and one of annual total discharge in acre feet. The total precipitation for the 2010 Water Year was slightly below average for the period of record at the Colony Site. The winter snow pack was average with most of the snow melting during the end of April. Spring moisture was below average. The late summer months were dry and below average. Total precipitation for the water year was 19.8 inches of moisture with the average being 20.5. The 2010 Water Year total stream flow discharge was below average, probably due to the dry fall of 2009. The snowmelt runoff was in April with stream flows staying below average all summer. Table 4 (with the graph titled Total Yearly Discharges) plots yearly stream flow runoff discharge in acre feet for each year from 1999 through 2010. The graph shows total runoff with the precipitation plotted against the second y-axis. Table 5 lists the average monthly stream flow at each monitoring site for the • period 1984 to 2010. The accompanying graph titled Average Monthly Discharge clearly shows peak discharges are usually during May. In 2010 stream discharge peaked during first of May from the snowmelt runoff. Stream flow water quality samples collected are listed in Table 2. During the 2010 Water Year samples were collected at F1 3R Davis Gulch (549N) and Middle Fork @ Lab sites. The Middle Fork at Lab site was dry for the March sample. Graphs were made of the water quality parameters which are marked in Table 3. These water quality graphs are in Appendix B. Parameters were not graphed when the analyte result was below the practical quantitation limit. Sampling sites were changed in 1993 to two sites, F1 3R Davis Gulch and Middle Fork @ Lab ( F1 R when MF@ Lab is dry). During 1997 the surface water quality parameters and chain of custody procedures were changed. Sampling parameters are outline in batteries for each type of sample collected (ie .- Site Stream, Site Well, or Site NPDES). Site Stream Battery A is listed in Appendix B. A separate chain of custody form is now filled out for each Battery Type. Each Battery is then logged by the Lab as a separate project, which streamlines billing and reporting. GROUNDWATER MONITORING WELLS Groundwater monitoring wells are summarized in Table 6 showing well location, completion interval, elevation, total depths and other data. 5