Evergreen MD 2003 WCPlan - Laserfiche WebLink

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.. .. .. II II' II I . II . . . . II . . . II . the case in July of 2002 period, the District did and will continue to rely on Evergreen Lake, as it's emergency water supply, As mentioned earlier the water taken out of Evergreen Lake for municipal use did provide a constant stream of return flows to Bear Creek, but they began below the Evergreen wastewater treatment facility, The upper reach of Bear Creek from Evergreen Lake to the wastewater plant went dry during this extremely low flow period in July of 2002, The only way that the District could have prevented this section of the stream from going dry would have been to release water from Evergreen Lake just to maintain the stream, Evergreen Lake as an emergency water supply contains roughly 120 days of minimal municipal water supply without Bear Creek flow, This was deemed to be to small a reserve capacity to meet both municipal and any minimal stream flows, which to do so even at only LO cfs would have reduced the District's emergency supply to less than 60 days, These conditions very easily will exist again, and Bear Creeks fish population will suffer anytime Evergreen needs to use Evergreen Lake as an emergency supply, Water Shortage from Low Bear Creek Flow and Emergency Response Drought responses to water shortages on Bear Creek will be categorized into four conditions, The responses will be based on two flow monitoring devices, which monitor and record the water flow in Bear Creek at two locations, One gauge is on Bear Creek prior to Evergreen Lake, and the other gauge is on Bear Creek prior to the town of Morrison, The Morrison gauge has been in existence since 1920, and has 80 years of water flow history associated with it The Evergreen gauge has only been in operation for 15 years, A comparison of the two gauge readings has been made over the timeframe the two gauges have been operating together, and a correlation of the two gauges has been established, See Appendix D, The Evergreen gauge has a correlation of 80% of the flow at the Morrison gauge, However in times of severe drought, due to all tributaries of Bear Creek drying up, only the Evergreen gauge will be used, The District can gain access to these two gauges for daily flow readings via satellite and the Internet The Internet address for the two gauges is listed in table 2 that itemizes all of the different agencies web sites, Table 2 www.water.state.co.us Bear Creek @ Morrison Gauge http:co.water.usgs.gov Press real time water data link Surface Water - South Platte Basin Station Number - 06710385 Bear Creek above Evergreen Lake 11