Embed Size (px)
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 neighborhood
Citation preview
Public MeetingApril 2, 2015
Albany Park Stormwater Diversion Tunnel
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
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
Albany Park Stormwater Diversion TunnelIntroduction - 2013 Flood
Albany Park Stormwater Diversion Tunnel
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.
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
Albany Park Stormwater Diversion TunnelIntroduction - FloodingAlternatives Considered –
Floodwall or BuyoutsAlbany Park Stormwater Diversion
Tunnel
Albany Park Stormwater Diversion TunnelIntroduction - FloodingProposed Project –
Plan ViewAlbany Park Stormwater Diversion
Tunnel
Albany Park Stormwater Diversion TunnelIntroduction - FloodingProposed Project –
Profile ViewAlbany Park Stormwater Diversion
Tunnel
Albany Park Stormwater Diversion TunnelIntroduction - FloodingProposed Project –
Inlet Plan ViewAlbany Park Stormwater Diversion
Tunnel
Albany Park Stormwater Diversion TunnelIntroduction - FloodingProposed Project –
Inlet Cross Section ViewAlbany Park Stormwater Diversion
Tunnel
Albany Park Stormwater Diversion TunnelIntroduction - FloodingProposed Project –
Inlet 3-D Model (no water)Albany Park Stormwater Diversion
Tunnel
NBCR Flow Direction
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
Albany Park Stormwater Diversion TunnelIntroduction - FloodingProposed Project –
Outlet Plan ViewAlbany Park Stormwater Diversion
Tunnel
Albany Park Stormwater Diversion TunnelIntroduction - FloodingProposed Project –
Outlet Cross Section ViewAlbany Park Stormwater Diversion
Tunnel
Albany Park Stormwater Diversion TunnelIntroduction - FloodingProposed Project –
Outlet 3-D Model (no water)Albany Park Stormwater Diversion
Tunnel
NSC Flow Direction
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
Albany Park Stormwater Diversion TunnelIntroduction - FloodingProposed Project – Hydraulic Profile
of NBCR Upstream of Dam(1% Annual Chance Flood)
Albany Park Stormwater Diversion Tunnel
Albany Park Stormwater Diversion TunnelIntroduction - FloodingProposed Project – Hydraulic Profile
of NBCR and NSC Below Dam(1% Annual Chance Flood)
Albany Park Stormwater Diversion Tunnel
Albany Park Stormwater Diversion TunnelConstruction – General Sequence
Part 2 (Tunnel Construction)
Albany Park Stormwater Diversion Tunnel
