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Last modified
1/26/2010 4:14:53 PM
Creation date
10/12/2006 5:34:36 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8449.900
Description
Bear Creek
State
CO
Basin
South Platte
Date
1/1/1987
Author
USACOE
Title
Bear Creek Clean Lakes Grant Application and correspondence
Water Supply Pro - Doc Type
Publication
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<br />The instream monitoring program will investigate the potential of bacterial <br /> <br /> <br />contamination from Turkey Creek. Although this creek is small, it may <br /> <br /> <br />contribute a substantial amount of bacteria. The monitoring program will <br /> <br /> <br />include sample collection from several sites along Turkey Creek in an attempt <br /> <br /> <br />to quantify the bacterial loading and to determine its source. <br /> <br />Reservoir Hydrology <br />Recent data collected on the reservoir shows an unusually strong <br /> <br /> <br />stratification occurring in the reservoir. The stratification develops at a <br /> <br /> <br />very shallow depth, often less than one meter below the surface. Oxygen <br /> <br /> <br />is depleted, and falls be.low the standard of 5,0 mg/L which may present a <br /> <br /> <br />problem for a successful fishery. Although the exact caUse of the strong, <br /> <br /> <br />shallow stratification is unknown, it is hypothesized that the reservoir <br /> <br /> <br />hydrology is responsible, Water is released from the surface of the reservoir <br /> <br /> <br />rather than from a bottom gate in the release structure. This method of <br /> <br /> <br />operation may be causing a short-circuiting of the flows where the inflows <br /> <br /> <br />do not mix but rather flow across the top of the water and exit without <br /> <br /> <br />mixing with the water column. <br /> <br /> <br />The objective of this task will be a determination of the reservoir <br /> <br /> <br />hydrology and its mixing patterns. If possible, the method of reservoir <br /> <br /> <br />operation will be modified to see if it helps break the stratification and allow <br /> <br /> <br />for better mixing of the water column. If this appears to be a successful <br /> <br /> <br />measure, the reservoir will experience improved retention times and an im- <br /> <br /> <br />provement in the dissolved oxygen concentrations, <br /> <br />9 <br />
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