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Project Area Description
Study area includes 2 watersheds: L I b ico be le y t A A v v e e. ( a
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Conditions (10-yr Storn
Significant Flooding Locations
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= Alternative Evaluation
12 alternatives analyzed
➢ Each alternative included multiple management components
' Management components include:
➢ Improvements to existing storm sewers
D New storm sewers
� , D Detention basins
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Alternative Evaluation
l' Potential Detention Basin Sites
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2 L160ey / No. Mahn Dry Channel 15 «
, " r 3. Tree Farm Wet Bash, 45 Dthnuon Arita* t ; ," 4 Packers Ave (act) Wet Basin n COflf(dIFId
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6 North H. S. Wet Basin 15 - - °" '.. AM M .
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Iterr°iative valuat�san
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_ ➢ Eli of street floo in 10 -year storm event
➢ Feasibility of construction (wetlands, utility conflicts, etc.)
,' ','":„.„..._:: ., ➢ Construction cost
{ ➢ Reduction of flooding for larger storm events (25 -yr & 100 -yr)
➢ P contr
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Alternative Evaluation
Alternative 1 0 Option .41 .._.1.101*- 1.• a.v. i.„..., ...4.034.: .41 .. :i, ,
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Alternative 12 Option
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Evaluation 25 - yr & 100 -yr storm events — significant flooding on
Jackson Street (greater than 1 -ft)
'` Evaluated larger storm sewer (box culverts) on Jackson
_ Street
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➢ Replaced circular storm sewer with box culve ( 5 ' x 8
➢ Other components remain the same
➢ Improved flood control during larger storm events
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Alternative Evaluation — Pollution Control
Sediment Removal Summary
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Cost Summary it
(with box culvert in Jackson)
* Cost estimates based on 2010 - 2011 City of Oshkosh projects
A:COM
Recommended Alternative
Alternative 12A
> Flood control benefits (Jackson street flooding eliminated
under 25 yr event)
-,, f11111;._N > Water quality benefits
- > Cost
> Fewer detention basin sites
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`', , Its:t ..,'-'' Phased impienientation
Irn elementation Phase 1 — North Hi. h School Area
--4
'n'i I; k-.."I'V ' G. Discussion/Questions
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