public meeting april 2, 2015 albany park stormwater diversion tunnel
DESCRIPTION
Introduction – 1% Annual Chance Flood Event Albany Park Stormwater Diversion Tunnel Source of Flood Boundary: Detailed Watershed Plan (January 2011) Note: 336 structures impacted in Albany Park neighborhoodTRANSCRIPT
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Public MeetingApril 2, 2015
Albany Park Stormwater Diversion Tunnel
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Albany Park Stormwater Diversion Tunnel
NBCR = North Branch of Chicago RiverNSC = North Shore Channel
Albany Avenue Stream Gauge onNBCR exceeded flood stage:• September 2008*• July 2010• April 2013*
*Significant Flooding Events
Introduction - FloodingIntroduction - FloodingAlbany Park Stormwater Diversion
Tunnel
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Albany Park Stormwater Diversion TunnelIntroduction – 1% Annual Chance
Flood Event Albany Park Stormwater Diversion
Tunnel
Source of Flood Boundary: Detailed Watershed Plan (January 2011)Note: 336 structures impacted in Albany Park neighborhood
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Albany Park Stormwater Diversion TunnelIntroduction - 2013 Flood
Albany Park Stormwater Diversion Tunnel
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Albany Park Stormwater Diversion TunnelIntroduction - FloodingIntroduction – Overbank Flooding in
Albany Park NeighborhoodAlbany Park Stormwater Diversion
Tunnel
The purpose of this project is to alleviate overbank flooding along the NBCR in the Albany Park neighborhood.
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Albany Park Stormwater Diversion TunnelAlternatives Considered
Albany Park Stormwater Diversion Tunnel
Alternatives Considered But Dismissed• Remove North
Branch Dam• Modify Ridgeway
Bridge (Eugene Field Park)
• Add Upstream Storage
Alternatives Analyzed• Floodwall (DWP)• Buyouts• Floodproofing
Structures• Diversion Tunnel
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Albany Park Stormwater Diversion TunnelIntroduction - FloodingAlternatives Considered –
Floodwall or BuyoutsAlbany Park Stormwater Diversion
Tunnel
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Albany Park Stormwater Diversion TunnelIntroduction - FloodingProposed Project –
Plan ViewAlbany Park Stormwater Diversion
Tunnel
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Albany Park Stormwater Diversion TunnelIntroduction - FloodingProposed Project –
Profile ViewAlbany Park Stormwater Diversion
Tunnel
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Albany Park Stormwater Diversion TunnelIntroduction - FloodingProposed Project –
Inlet Plan ViewAlbany Park Stormwater Diversion
Tunnel
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Albany Park Stormwater Diversion TunnelIntroduction - FloodingProposed Project –
Inlet Cross Section ViewAlbany Park Stormwater Diversion
Tunnel
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Albany Park Stormwater Diversion TunnelIntroduction - FloodingProposed Project –
Inlet 3-D Model (no water)Albany Park Stormwater Diversion
Tunnel
NBCR Flow Direction
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Albany Park Stormwater Diversion TunnelIntroduction - FloodingProposed Project –
Inlet 3-D Model (1% Annual Chance Flood)
Albany Park Stormwater Diversion Tunnel
To Dam To Diversion Tunnel
*Roughly 45/55% Split Between River and Diversion Tunnel for the 1% Annual Chance Flood
NBCR Flow Direction
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Albany Park Stormwater Diversion TunnelIntroduction - FloodingProposed Project –
Outlet Plan ViewAlbany Park Stormwater Diversion
Tunnel
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Albany Park Stormwater Diversion TunnelIntroduction - FloodingProposed Project –
Outlet Cross Section ViewAlbany Park Stormwater Diversion
Tunnel
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Albany Park Stormwater Diversion TunnelIntroduction - FloodingProposed Project –
Outlet 3-D Model (no water)Albany Park Stormwater Diversion
Tunnel
NSC Flow Direction
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Albany Park Stormwater Diversion TunnelIntroduction - FloodingProposed Project – Outlet 3-D
Model (1% Annual Chance Flood)
Albany Park Stormwater Diversion Tunnel
NSC Flow Direction
From Diversion
Tunnel
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Albany Park Stormwater Diversion TunnelIntroduction - FloodingProposed Project – Hydraulic Profile
of NBCR Upstream of Dam(1% Annual Chance Flood)
Albany Park Stormwater Diversion Tunnel
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Albany Park Stormwater Diversion TunnelIntroduction - FloodingProposed Project – Hydraulic Profile
of NBCR and NSC Below Dam(1% Annual Chance Flood)
Albany Park Stormwater Diversion Tunnel
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Albany Park Stormwater Diversion TunnelConstruction – General Sequence
Part 2 (Tunnel Construction)
Albany Park Stormwater Diversion Tunnel