Parkdale / Lawnview Avenue Neighborhood - Dallas Documents/Mill... Tunnel Boring Machine (TBM) Workers

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  • Mill Creek/Peaks Branch/ State Thomas

    Drainage Relief Tunnel

    Parkdale / Lawnview Avenue Neighborhood April 26, 2016

  • Mill Creek, Peaks Branch and State-Thomas Watersheds

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    PARKDALE

  • 3

     Basin Area  State-Thomas – 450 acres  Mill Creek – 2,200 acres  Peaks Branch – 3,100 acres  East Peaks – 1,100 acres

     Land Uses  Upper Basin – Residential  Lower Basin – Commercial

     What’s in these basins?  Baylor Hospital  Old City Park  Deep Ellum  IH-30  Fair Park  “M” Streets

    Basin Characteristics

  •  Flooding has been a problem in the Mill Creek, Peaks Branch and State-Thomas areas for years

     Mill Creek and Peaks Branch were originally natural streams draining into the Trinity River and White Rock Creek

     In the early 1900’s, the streams were enclosed in underground pipes

     Re-development in the State-Thomas area has exceeded the capacity of local and outfall drainage systems

     The drainage systems were sized to carry smaller standard storm events

    4

    Mill Creek / Peaks Branch State-Thomas Background

  •  In a 100-year rain event (1% annual chance):

     Undersized local drainage systems cause streets to flood

     Flood depths are up to 10 feet high

     Additional capacity is needed in the storm sewers to accept added run-off from neighborhood drainage system

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    Mill Creek / Peaks Branch State-Thomas Background

  • Mill Creek and Peaks Branch History

     Underground Storm Sewer Construction - 1930s

     May 1995 Flood  March 2006 Flood  September 2007 Flood

  •  Flooding businesses and homes

     Baylor Emergency Room closed - flood damage $5M

     Old City Park

     Fair Park

     IH 30 closed due to high water

    May 1995 Flood Dallas Morning News Front Page May 7, 1995

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  • Widespread flooding throughout Dallas

    March 19th rainfall totals as high as 9.8” in Old East Dallas

     Extensive street, structure and vehicle flooding in East Dallas

    March 2006 Flood

  • Mill Creek Flooding – Baylor Hospital Area Flooding March 19, 2006

  • Monticello Avenue – West of Greenville Avenue

    Mill Creek Flooding – March 2006

  • Zaragoza Elementary Flooding 11

    Peaks Branch Flooding – March 2006

  • Worth Street Flooding 12

    Peaks Branch Flooding – March 2006

  • I-30 Flooding – March 2006

  • City Commissioned Studies

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     Mill Creek  Mill Creek Master Drainage Plan Study (2006)

     Peaks Branch  Lower Peaks Branch Preliminary Design Report (1976)  Peaks Branch Preliminary Design Report (1989)

     Mill Creek and Peaks Branch Initial Study (2008)  State-Thomas Area Studies

     Town Branch Study (1986)  State-Thomas Master Drainage Plan (1998)  Woodall Rodgers Drainage Tunnel Improvement Plan (2007)

  • 2006 Plan – Mill Creek(1) / Middle Peaks Branch(2) and State Thomas(3)

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    1

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  • Mill Creek/Peaks Branch/State Thomas Drainage Tunnel

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  •  Tunnel Length – 5 Miles  Tunnel Diameter – 30 Feet  Tunnel Depth – 70 Feet to 150 Feet  Tunnel Volume – 160 Million Gallons  Project Budget – $320 Million  Construction Duration – 5 Years starting in 2016  Construction method – Tunnel Boring Machine

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    Project Information

  • Mill Creek / Peaks Branch / State Thomas Drainage Relief Tunnel

  • Tunnel Profile

  • Drainage Relief Tunnel

    http://voteyesdallas.com/press-room-images.html

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    30’x35.5’ HORSESHOE MAIN TUNNEL SECTION

    OUTFALL TO SITE A (2 MILES)

    30’ CIRCULAR MAIN TUNNEL SECTION

    SITE A TO END (3 MILES)

    Tunnel Sections

  • Tunnel Boring Machine (TBM)

  • Deep Tunnel Construction

    23

    Tunnel Boring Machine (TBM) Workers on a TBM after break-through

    Advantages to tunneling: • Minimal utility relocation • Reduced ROW acquisition • Minimal street replacement • Minimal traffic impacts

  • Areas Currently Subject to 100-Year Flooding in Mill Creek, Peaks Branch and State Thomas Watersheds

    Note: Hatched area denotes known street flooding in the State Thomas area

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  • 60% of the Areas Removed from 100-Year Flooding After Mill Creek, Peaks Branch and State-Thomas Tunnel is Constructed

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  • 26

    White Rock Creek Drainage Area

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     Water surface elevations in the White Rock Creek and Forney Branch floodplains remain the same

     Parkdale / Lawnview neighborhood impacts  Construction truck traffic permitted along SH 352 (Scyene Road)

     Construction hauling will be limited to 7 am to 7 pm

    Parkdale / Lawnview Concerns - Mill Creek / Peaks Branch /

    State Thomas Drainage Tunnel

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    PARKDALE

    White Rock Creek Floodplain

  • Mill Creek / Peaks Branch / State Thomas Drainage Relief Tunnel

    Mill Creek/Peaks Branch/�State Thomas�Drainage Relief Tunnel Mill Creek, Peaks Branch and State-Thomas Watersheds Slide Number 3 Slide Number 4 Slide Number 5 Mill Creek and Peaks Branch History Slide Number 7 Slide Number 8 Mill Creek Flooding – Baylor Hospital Area Flooding March 19, 2006 Slide Number 10 Slide Number 11 Slide Number 12 Slide Number 13 City Commissioned Studies 2006 Plan – Mill Creek(1) / Middle Peaks Branch(2) and State Thomas(3) Mill Creek/Peaks Branch/State Thomas Drainage Tunnel Project Information Mill Creek / Peaks Branch / �State Thomas Drainage Relief Tunnel Tunnel Profile� Drainage Relief Tunnel Slide Number 21 Tunnel Boring Machine (TBM)� Deep Tunnel Construction Slide Number 24 60% of the Areas Removed from 100-Year Flooding After Mill Creek, Peaks Branch and State-Thomas Tunnel is Constructed� Slide Number 26 Parkdale / Lawnview Concerns -�Mill Creek / Peaks Branch / �State Thomas Drainage Tunnel Slide Number 28 Mill Creek / Peaks Branch / �State Thomas Drainage Relief Tunnel

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