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Location:
Sierra Valley - Chilchoot and Beckwourth
areas
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Sponsors:
Sierra Valley Groundwater Management District |
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Project Type:
Hydrogeologic study and data collection |
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Est. Cost:
$151,700 Amount Funded: $151,700
Majority”A” funds |
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Est. Start Date:
Fall 2004
Est. End Date: Spring 2005 |
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Project Description:
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Subsurface geologic cross sections mappings to be prepared to
indicate major water-producing strata and other geological data
(not currently available) in Chilcoot and Beckwourh area.
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Cluster monitoring well construction proposed for Chilcoot and
Beckwourth area to be used for future continuous water level
monitoring.
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Project Goals/Objectives:
Detailed water-level
elevation and direction of groundwater flow maps included in the
cross sections study will provide the information required to access
the potential for groundwater recharge projects in the upper
watershed. Cluster monitoring wells will provide water level data to
analyze the effectiveness of temporal retention in relationship to
groundwater recharge in Sierra Valley. The study includes
monitoring wells and identification of water producing zones in
areas of the Sierra Valley groundwater basin where monitoring has
been at a minimum. The areas of Chilcoot and Beckwourth have been
identified as “data gaps” and are targeted in the District’s
proposal.
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Project Activities:
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Two nested monitor
wells were installed in Chilcoot and Beckwourth, tested and
water samples collected for chemical analysis.
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New subsurface
geologic cross sections were developed.
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Updated records of
metered pumpage and water levels for Spring 2003 through Spring
2005
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Interpreted trends
after reviewing water level records extending back to 1960 in
conjunction with 1989 – 2005 records of metered pumpage and
water levels. Conclusion: metered pumpage of 6000 acre-feet per
year results in near stable water levels
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Released a technical
report on the 2003-2005 Sierra Valley Hydrogeologic Studies.
Limited copies available for review from Plumas County Flood
Control & Water Conservation District, 1834 East Main St. Quincy
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Submitted proposal to
Watershed Forum to rollover surplus funds from the Monitoring
Well project to aquifer testing
Project Status:
Completed May 2005 Amount Spent :
$120,984
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