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Mill Creek, Peaks Branch and State-Thomas Watersheds
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PARKDALE
Mill Creek/ Peaks Branch/ State Thomas Drainage Relief Tunnel - - PowerPoint PPT Presentation
Mill Creek/ Peaks Branch/ State Thomas Drainage Relief Tunnel - - PowerPoint PPT Presentation
Mill Creek/ Peaks Branch/ State Thomas Drainage Relief Tunnel Parkdale / Lawnview Avenue Neighborhood April 26, 2016 Mill Creek, Peaks Branch and State-Thomas Watersheds PARKDALE 2 Basin Characteristics Basin Area State-Thomas
SLIDE 2
SLIDE 3
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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
SLIDE 4
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
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Mill Creek / Peaks Branch State-Thomas Background
SLIDE 5
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
SLIDE 6
Mill Creek and Peaks Branch History
Underground Storm Sewer
Construction - 1930s
May 1995 Flood March 2006 Flood September 2007 Flood
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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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SLIDE 8
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
SLIDE 9
Mill Creek Flooding – Baylor Hospital Area Flooding March 19, 2006
SLIDE 10
Monticello Avenue – West of Greenville Avenue
Mill Creek Flooding – March 2006
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Zaragoza Elementary Flooding
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Peaks Branch Flooding – March 2006
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Worth Street Flooding
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Peaks Branch Flooding – March 2006
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I-30 Flooding – March 2006
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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)
SLIDE 15
2006 Plan – Mill Creek(1) / Middle Peaks Branch(2) and State Thomas(3)
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SLIDE 16
Mill Creek/Peaks Branch/State Thomas Drainage Tunnel
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SLIDE 17
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
SLIDE 18
Mill Creek / Peaks Branch / State Thomas Drainage Relief Tunnel
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Tunnel Profile
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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
SLIDE 22
Tunnel Boring Machine (TBM)
SLIDE 23
Deep Tunnel Construction
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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
SLIDE 24
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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SLIDE 25
60% of the Areas Removed from 100-Year Flooding After Mill Creek, Peaks Branch and State-Thomas Tunnel is Constructed
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SLIDE 26
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White Rock Creek Drainage Area
SLIDE 27
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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
SLIDE 28
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PAR ARKDAL ALE White Rock Creek Floodplain
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