HomeMy WebLinkAbout2014.09.02 CC PowerPoint Bald Eagle DamBald Eagle Lake Outlet Update
September 2, 2014
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Bald Eagle Lake
August 18 Council meeting
Discussion topics
Replacement of the outlet/dam
Ongoing maintenance of the outlet/dam
Council direction
Review bridge alternative
Review design in light of stormwater reuse
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Bridge Alternative
Span the weir/outlet structure without disturbing
Issues
N Potential damage to inplace structure
Impacts to adjacent properties/lake
Easement acquisition
Cost: $1,500,000 - $2,000,000
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Water Reuse Opportunities
0 Modify Bald Eagle Lake Outlet structure to:
Store additional water in Bald Eagle Lake.
N 1 inch of additional depth provides 27 million gallons
(85 acre ft.) of additional storage.
Provide piping/manhole structure for access
Cost — 10-15% increase, or $60-$90,000 for structure plus
costs for permitting.
Permitting: DNR, RCWD, Corp of Engineers, other.
a Cost for reuse system....TBD.
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Water Reuse Opportunities
Capture water downstream of dam
E Construct storage area — 500 acre-feet (1.5 billion gal.)
F Could be located to capture more runoff than Bald Eagle
Lake
�' Creates additional treatment — TMDL benefits
Cost of $5-$10 million for storage area
� Potential cost reductions through use of soils, reduction in
captured runoff
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Next Steps
Discussion/direction from Council
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Current Funding Status
Total Estimated Cost
MnDOT Bridge funds
Remaining Funding need
$600,000
$252,000
$348,000
Outlet could be replaced within one year if funding available
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