Trinity River Corridor Project
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Transcript of Trinity River Corridor Project
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The project covers 20 miles of the Trinity River, approx. 10,000 acres
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Trinity River Corridor Project Objectives
This project addresses a number of regional concerns, though flood protection remains the essential cornerstone of this multi-faceted effort. The inter-related components of the project are:
– Flood Protection– Environmental Restoration– Recreation– Transportation– Community/economic development
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Flood Protection
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Flood Protection Components
Dallas Floodway Extension (DFE) levees and wetlands for flood conveyance
Dallas Floodway levee raise and flood conveyance (lakes)
Elm Fork Flood Improvements levees and wetlands for flood conveyance
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Flood Protection - Construction
Lower Chain of Wetlands
Cells D, E, F & G are complete, and doing their job!
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Future Work: DFE Levees & Wetlands
Lamar Levee
Cadillac Heights Levee
Upper Chain of Wetlands
• Upper Chain of Wetlands construction starts Summer 2009• All work complete in 2014
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Flood Protection: Dallas Floodway
• Existing levees will be raised by as much as 2 ft. • Will provide 800 year flood protection from Trinity River flooding• Construction can begin in 2011
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Levee Section at CommerceWater Surface Elevations vs Parkway
Existing LeveeElevation 429.40
Future 2-Foot Raised Levee Elevation 431.40
Ground Elevationabout 400.00
Average low flow conditions that stay within the
river channel of the Dallas Floodway
Elevation 382.00
800-year FloodElevation 428.97
100-year Elevation 417.06Same as 1908flood of record
May 199035-year FloodElevation 415.24
June 20075-year FloodElevation 408.38
Trinity Parkway Flood Protected Elevation 419.06
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USACE Periodic Inspection Report #9
• Periodic Inspections are done every 5 years by USACE (in addition to annual inspections)
• Visual inspection only; no subsurface investigation
• Previous inspections rated our levee system as Excellent to Very Good
• New rating system established by USACE in June 2007
• Rating in Periodic Inspection Report #9 for our levee system was “unacceptable”
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Levee Issues from Periodic Inspection #9
• Encroachments– Dallas County Jail– Oncor Transmission Towers
• Penetrations– Bridge Piers– Pipes
• Dessication Cracking• Erosion• Vegetation
– Trees on/near the levees– Johnson grass
• Levees not high enough to contain the Standard Project Flood (800 year flood event)
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• More frequent mowing cycles• Rip rap/drainage relocation for erosion• Soil borings will determine needs for diaphragm walls• Work with other agencies to determine needs• The Trinity River Corridor Project will provide many of
the “fixes” for the unacceptable conditions of the levee system– Diaphragm walls– Chain of wetlands– Removal of ATSF Railroad Bridge– Raising/fattening the levees
Resolution of Levee Issues – Next Steps
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Environmental Restoration
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Environmental Restoration
• 6,000 acres of bottomland hardwood forest
• Many bird and wildlife species• Council has approved the Great
Trinity Forest Management Plan – How we will operate and
maintain the forest for the next 100 years
– Identifies wildlife and tree species
– Outlines annual planting, clearing, and budgetary needs
– Identifies a potential site for RV and tent camping in the forest
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Recreation
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Trinity River Corridor Project Design Concept
• Summary of the design concept for a 10,000-acre portion of the Trinity River Corridor from Royal Lane down to IH-635/IH-20 past the Trinity River Audubon Center.
• About two-thirds of the subject area lies within the Trinity Forest.
• By necessity, the guidelines are mostly focused on the Trinity Lakes portion of the corridor—the Trinity Lakes Park—about 2,200 acres in extent from the confluence to the DART Bridge.
Trinity LakesTrinity Lakes Trinity ForestTrinity Forest
Audubon CenterAudubon Center
Confluence:Elm and West Forks
Confluence:Elm and West Forks
Trinity FieldsTrinity Fields
DART BridgeDART Bridge
Royal LaneRoyal Lane
IH-635/ IH-20IH-635/ IH-20
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Recreation:Trinity Fields
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Recreation: Elm Fork Athletic Complex & Trails
• Located east of IH-35E on Walnut Hill Lane
• Construction starts in September 2009; complete in April 2011
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Recreation:Trinity Lakes
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Recreation: Trinity Lakes Park
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Recreation: West Dallas Lake Rowing
• The West Dallas lake is over 129 acres and over 2000 meters long (meets Olympic standards) that will provide both recreational and competitive boating opportunities for the city and region.
• Submerged wetland island to provide a rooting structure for water lilies.
Amphitheater
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Recreation: West Dallas Lake Amphitheater
• West Dallas Lake Amphitheater used for rowing competition viewing.
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Recreation: View from West Dallas
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Recreation: Urban Lake, Promenade & Arrival Plaza
• The promenade will accommodate 19,000 people during peak events and activities
• 80% of the promenade will be shaded throughout the course of the day.
Downtown Overlook
Water Maze
Deck Park
Wetland Water Wall
Arrival Plaza
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Recreation: Urban Lake & Central Island
• Shade structures take the place of tree vegetation in this plaza preserving views of the downtown skyline and promenade, while Seating walls are integrated with the topography and provide illumination at night.
• Interactive fountains and dark-colored, exposed aggregate concrete paving slopes into the lake as a beach.
Solar-powered Water Taxi
Fountain Plaza
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Recreation: Trinity Overlook
CO
MM
ER
CE
ST
RE
ET
BR
IDG
E
• Located on the west levee at Beckley and Commerce• Provides an observation area to watch the
construction of the Trinity Project
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Recreation: Natural Lake Floating Wetlands
• The floating wetlands are multifunctional, serving as a design aesthetic, educational demonstration, habitat and water quality improvement measure.
Oak Cliff
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Recreation: Corinth Wetlands
• The Corinth Wetlands and Oxbow Lake area is designed to be a passive observation area for understanding and appreciating wetland habitats and systems.
• This environment will be a magnet for migratory birds and other aquatic and riparian wildlife and birding observation areas, boardwalks, tree groves and shaded respites are planned for this area.
Synthetic Decking
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Recreation:Trinity Forest
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Recreation: Trinity River Audubon Center
Trinity River Audubon Center
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Recreation: Trinity River Audubon Center
Flood Model
Children’s Area with underwater viewExhibits on the Trinity River and its ecosystem
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Trinity River Audubon Center
Note the many trails and wetlands surrounding the Audubon Center!
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Recreation: Standing Wave & Santa Fe Trestle Trail
Standing Wave Whitewater Course
Santa Fe Trestle Trail
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Recreation: Standing Wave & Santa Fe Trestle Trail
DART
Santa Fe Trestle TrailCor
inth
St.
MLK
, Jr.
Blvd
.
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Recreation: Existing Trails in Rochester Park
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Recreation: Future Trails Network
Trinity Trails Phase I
Trinity Trails Phase II
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• Several gateway parks are planned and will begin design soon:– Loop 12 Gateway (construction
begins 5/2010)
– IH-20 Gateway (construction begins 6/2010)
– South Central/Joppa Gateway (construction begins 12/09)
– Improvements to Rochester Park Gateway (construction begins 12/09)
Recreation: Gateway Parks
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Transportation: Trinity Parkway Toll Road
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Transportation: Trinity Parkway Toll Road
Trinity Parkway complete by 2014
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Transportation: Trinity Parkway Toll Road
Looking South from Hampton Rd.
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Transportation: S.M. Wright Parkway
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46Trinity Parkway & S.M. Wright
IH 45
US 175
N
Today’s
Commuter Flow
FutureCommuter Flow
SM Wright Freeway
Proposed
Trinity
Parkway
Ideal Neighborhood Rochester Park
45
Lamar
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S.M. Wright Parkway
• Trinity Parkway connection to IH-45 eliminates need for “Dead Man’s Curve” at US 175 and S.M. Wright
• Provides opportunity to make S.M. Wright a low-speed road
• Pedestrian crossings, sidewalks, landscaping• Options for split or combined meandering road
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Transportation: Sylvan Ave. Bridge
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Sylvan Ave. Bridge
• TxDOT/City of Dallas project• Estimated cost $48 million• Estimated construction start late 2009 (may be delayed until
2010 bond program)
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Transportation: Signature Bridges
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Transportation: Margaret Hunt Hill Bridge
Margaret Hunt Hill Bridge under construction
complete in 2011
Visit the webcam at
www.trinityrivercorridor.org
to view construction progress
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Transportation: Margaret Hunt Hill BridgeSteel Fabrication in Italy
Part of the center arch
Central Box Girders
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Continental Ave.
Continental Ave.
Continental Ave.
Continental Ave.
Industrial BoulevardIndustrial Boulevard Industrial BoulevardIndustrial Boulevard
Spur 366 (Woodall R
odgers)
Spur 366 (Woodall R
odgers)
IH 35EIH 35E
Singleton Blvd.
Singleton Blvd.
Singleton Blvd.
Singleton Blvd.
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Transportation: Margaret McDermott Bridge
Trinity Parkway complete by 2014
• Replaces IH-30 Bridge
•Center arch 250 ft. tall
•11 main lanes, reversible HOV lane
• TxDOT construction to begin in late 2010
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Trinity River Project Office(214) 671-9500
www.trinityrivercorridor.org
ftp://ftp.dallascityhall.com