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Kinnickinnic River      Flood Management and     Watercourse RehabilitationAchieving Multiple Design Objectives        Tho...
Kinnickinnic River (KKR) Watershed                        KKR S. 6th St. to                          I-94 Bridge          ...
Updated Floodplain  (SEWRPC, 2008)                   6th St Bridge
KKR FM S. 6th St. to I-94 Bridge        Project Area Characteristics• South 6th Street Bridge• Upstream Watercourse Segmen...
KKR FM Project Limits                        South 5th StreetBridge                      Downstream WC SegmentSouth 6th St...
KKR FM Project Limits                                    South 5th Street                   BridgeSouth 6th Street        ...
KKR 6th St. Bridge – Upstream (West Side)
KKR 6th St. Bridge – Downstream (East Side)
KKR Upstream Watercourse Segment• Concrete Lined Channel  – Constructed in 1983  – 500 ft. length, 2:1 side slopes  – 60 f...
KKR Upstream Watercourse Segment          Unstable       Embankment                 End of       with Sand and            ...
KKR Upstream Watercourse Segment            Unstable         Embankment         with Sand and           Gravel Fill       ...
KKR Upstream Watercourse Segment
KKR Upstream Watercourse Segment
KKR Downstream of South 6th Street Bridge             June 7, 1961
WPA Revetment Wall Buried in 1983
Existing KKR Concrete Lined Channel          Constructed 1983   WPA Wall   Weep Hole           Buried WPA                 ...
Existing KKR Concrete Lined Channel and   Buried WPA Revetment Wall, 1983                                               Bu...
KKR Downstream Watercourse Segment• Earthen / Rock Lined Channel  –   500 ft. length  –   Channel scour and deposition  – ...
KKR Downstream Watercourse Segment  End of Concrete   Lined Channel               Eroded Side Slope due to                ...
KKR Downstream Watercourse Segment  Storm Sewer                   Eroded Side Slope due to    Outfalls                    ...
KKR Downstream Watercourse Segment
KKR Downstream Watercourse Segment
Stakeholder Involvement• KK River Neighborhood Plan  – Plan for overall KK River Flood Management    Project  – Coordinati...
Proposed Improvements         KKR S. 6th Street Bridge• Design Objectives  – Significantly reduce upstream WSE’s  – Mainte...
Proposed Bridge
11-02-10 Bridge Construction
Proposed Improvements  KKR Upstream Watercourse Segment• Design Objectives  – Rehabilitated Main Channel  – Maintain stabl...
Upstream KKR Improvements                           Minimum 2:1                           Side Slopes               Retain...
Upstream KKR Cross-Sections
Proposed ImprovementsKKR Downstream Watercourse Segment• Design Goals  – Rehabilitated main channel and floodplain  – Stab...
Downstream KKR ImprovementsRepair erosion          Five Pools within from 5th St.             Main Channel    runoff      ...
KKR Downstream Cross-Section                     Typical Riffle Section
KKR Main Channel Cross-Sections                      Typical Pool Section
KKR Watercourse Rehabilitation       Improvements Schedule• Advertisement – May 2010• Construction Start – Oct. 2010• Cons...
Kinnickinnic River Project Team            Acknowledgements• Dale Miller, Mainstream Restoration• Rose Chmielewski, Ecolog...
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Kinnickinnic River Flood Management and Watercourse Rehabilitation

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Kinnickinnic River Flood Management and Watercourse Rehabilitation - Tom Sear, SEH

Nov 2010

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Kinnickinnic River Flood Management and Watercourse Rehabilitation

  1. 1. Kinnickinnic River Flood Management and Watercourse RehabilitationAchieving Multiple Design Objectives Thomas R. Sear, PE, CFM Short Elliott Hendrickson Patrick C. Elliott, MMSD
  2. 2. Kinnickinnic River (KKR) Watershed KKR S. 6th St. to I-94 Bridge Project Location
  3. 3. Updated Floodplain (SEWRPC, 2008) 6th St Bridge
  4. 4. KKR FM S. 6th St. to I-94 Bridge Project Area Characteristics• South 6th Street Bridge• Upstream Watercourse Segment – 500 feet of concrete lined channel – Confined cross-Sections – Steep northern embankment – MMSD CSO Facility on south• Downstream Watercourse Segment – 500 feet of earthen / rock lined channel – Eroded north embankment, south of 5th Street – Heavily vegetated north embankment – South embankment instability
  5. 5. KKR FM Project Limits South 5th StreetBridge Downstream WC SegmentSouth 6th Street Kinnickinnic River
  6. 6. KKR FM Project Limits South 5th Street BridgeSouth 6th Street Downstream WC Segment Kinnickinnic River
  7. 7. KKR 6th St. Bridge – Upstream (West Side)
  8. 8. KKR 6th St. Bridge – Downstream (East Side)
  9. 9. KKR Upstream Watercourse Segment• Concrete Lined Channel – Constructed in 1983 – 500 ft. length, 2:1 side slopes – 60 ft top width, 24 ft bottom width• Northern Embankment – Buried (300 ft. long) WPA Wall – Railroad trestle remnants – Steep and unstable side slopes• Southern Embankment – Maintenance Ramp – MMSD CSO facility and outfall
  10. 10. KKR Upstream Watercourse Segment Unstable Embankment End of with Sand and Concrete Gravel Fill Lined Material Channel MMSD KK1 Combined Facility Sewer Outfall Maintenance Ramp South 6th Street
  11. 11. KKR Upstream Watercourse Segment Unstable Embankment with Sand and Gravel Fill Material MMSD CSO Control Facility Combined Sewer Outfall Maintenance Ramp
  12. 12. KKR Upstream Watercourse Segment
  13. 13. KKR Upstream Watercourse Segment
  14. 14. KKR Downstream of South 6th Street Bridge June 7, 1961
  15. 15. WPA Revetment Wall Buried in 1983
  16. 16. Existing KKR Concrete Lined Channel Constructed 1983 WPA Wall Weep Hole Buried WPA Revetment Wall 84” Diameter RCP Storm Sewer Outfall Combined Sewer Outfall
  17. 17. Existing KKR Concrete Lined Channel and Buried WPA Revetment Wall, 1983 Buried WPA Revetment Wall WPA Wall Weep Hole 18 feet 24 feet 18 feet Approx. 15 ft
  18. 18. KKR Downstream Watercourse Segment• Earthen / Rock Lined Channel – 500 ft. length – Channel scour and deposition – Embankment erosion – Storm sewer outfalls• Northern Embankment – Failing Gabion Structure – Embankment erosion south of 5th Street – Vegetated riparian areas• Southern Embankment – Steep / unstable side slopes – Collapsing stone revetment walls – Exposed watercourse flushing pipeline
  19. 19. KKR Downstream Watercourse Segment End of Concrete Lined Channel Eroded Side Slope due to 5th Street Runoff Failing Revetment Wall KKR Earthen / Rock Lined Channel Storm Sewer Storm Sewer Outfalls Outfall Exposed Abandoned Flushing Pipeline Steep and Unstable Side Slopes
  20. 20. KKR Downstream Watercourse Segment Storm Sewer Eroded Side Slope due to Outfalls 5th Street Runoff Storm Sewer Outfall KKR Earthen / Rock Lined Channel Failing Revetment Wall Steep and Unstable Side Exposed Abandoned Slopes Flushing Pipeline
  21. 21. KKR Downstream Watercourse Segment
  22. 22. KKR Downstream Watercourse Segment
  23. 23. Stakeholder Involvement• KK River Neighborhood Plan – Plan for overall KK River Flood Management Project – Coordination with local government agencies and community groups – Successfully accommodated various design requests from stakeholders• Public Meetings
  24. 24. Proposed Improvements KKR S. 6th Street Bridge• Design Objectives – Significantly reduce upstream WSE’s – Maintenance / bike path beneath bridge• Proposed Design Features – Clear span concrete girder bridge – Functional, durable and attractive bridge• Final Design Complete – Currently Under Construction – Scheduled for Completion in Dec. 2010
  25. 25. Proposed Bridge
  26. 26. 11-02-10 Bridge Construction
  27. 27. Proposed Improvements KKR Upstream Watercourse Segment• Design Objectives – Rehabilitated Main Channel – Maintain stable side slopes / hydraulic capacity – Maintenance / bike path alignment• Design Features – Realigned channel centerline – Stone lined channel with riffles and pools – Tiered retaining walls, both sides – Recycle WPA wall limestone blocks – 15 ft. wide maintenance / bike path
  28. 28. Upstream KKR Improvements Minimum 2:1 Side Slopes Retaining Walls Future KKR Bike Trail
  29. 29. Upstream KKR Cross-Sections
  30. 30. Proposed ImprovementsKKR Downstream Watercourse Segment• Design Goals – Rehabilitated main channel and floodplain – Stable embankment slopes – Native vegetation plantings – Promote watercourse sediment continuity• Design Features – Stone lined channel with riffles and pools – 2:1 to 4:1 native vegetated side slopes – Reuse of limestone blocks / streambed stone – 15 ft. wide maintenance / bike path
  31. 31. Downstream KKR ImprovementsRepair erosion Five Pools within from 5th St. Main Channel runoff 3:1 Side Slope, where space allows Future KKR Bike Path
  32. 32. KKR Downstream Cross-Section Typical Riffle Section
  33. 33. KKR Main Channel Cross-Sections Typical Pool Section
  34. 34. KKR Watercourse Rehabilitation Improvements Schedule• Advertisement – May 2010• Construction Start – Oct. 2010• Construction Completion – Dec. 2011• Upstream Improvements – Finishing Preliminary Engineering – Starting Home Acquisition/Deconstruction
  35. 35. Kinnickinnic River Project Team Acknowledgements• Dale Miller, Mainstream Restoration• Rose Chmielewski, Ecological Services of Milwaukee• Doug Bath, Gestra Engineering

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