Trinity River Corridor ProjectPresentation Transcript
The project covers 20 miles of the Trinity River, approx. 10,000 acres
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 Components Elm Fork Flood Improvements levees and wetlands for flood conveyance Dallas Floodway Extension (DFE) levees and wetlands for flood conveyance Dallas Floodway levee raise and flood conveyance (lakes)
Flood Protection - Construction Lower Chain of Wetlands Cells D, E, F & G are complete, and doing their job!
Future Work: DFE Levees & Wetlands
Upper Chain of Wetlands construction starts Summer 2009
All work complete in 2014
Lamar Levee Cadillac Heights Levee Upper Chain of Wetlands
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
Levee Section at Commerce Water Surface Elevations vs Parkway Existing Levee Elevation 429.40 Future 2-Foot Raised Levee Elevation 431.40 Ground Elevation about 400.00 Average low flow conditions that stay within the river channel of the Dallas Floodway Elevation 382.00 800-year Flood Elevation 428.97 100-year Elevation 417.06 Same as 1908 flood of record May 1990 35-year Flood Elevation 415.24 June 2007 5-year Flood Elevation 408.38 Trinity Parkway Flood Protected Elevation 419.06
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”
Levee Issues from Periodic Inspection #9
Dallas County Jail
Oncor Transmission Towers
Trees on/near the levees
Levees not high enough to contain the Standard Project Flood (800 year flood event)
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
Chain of wetlands
Removal of ATSF Railroad Bridge
Raising/fattening the levees
Resolution of Levee Issues – Next Steps
Levee will provide protection for over $25 million in assets (near Manana and Spangler)
Wetland swale will provide additional flood conveyance
Final plans by March 2009
Construction Start by Fall 2009
Flood Protection: Elm Fork
Flooding in March 2006 from Interior Drainage
Flood Protection: Interior Drainage Near Pavaho Sump area at Sylvan Ave. North of Bernal St. in West Dallas
Flood Protection: Interior Drainage
Design contracts are underway for Baker and Pavaho Sumps and Pump Stations (can begin construction in Fall 2009)
Design contracts for Able, Charlie, Delta, Trinity Portland, and Hampton pump stations were awarded on November 10, 2008 (cannot begin construction until after Corps completes Environmental Assessment in late 2010)
Baker Pavaho Able Charlie Delta Hampton Trinity Portland
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
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 Lakes Trinity Forest Audubon Center Confluence: Elm and West Forks Trinity Fields DART Bridge Royal Lane IH-635/ IH-20
Recreation: Trinity Fields
Recreation: Elm Fork Athletic Complex & Trails
Located east of IH-35E on Walnut Hill Lane
Construction starts in September 2009; complete in April 2011
Recreation: Trinity Lakes
Recreation: Trinity Lakes Park
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.
Recreation: West Dallas Lake Amphitheater
West Dallas Lake Amphitheater used for rowing competition viewing.
Recreation: View from West Dallas
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
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
Located on the west levee at Beckley and Commerce
Provides an observation area to watch the construction of the Trinity Project
Recreation: Trinity Overlook COMMERCE STREET BRIDGE
Recreation: Natural Lake Floating Wetlands
The floating wetlands are multifunctional, serving as a design aesthetic, educational demonstration, habitat and water quality improvement measure.
Recreation 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.
Recreation: Trinity Forest
Recreation: Trinity River Audubon Center Trinity River Audubon Center
Recreation: Trinity River Audubon Center Flood Model Children’s Area with underwater view Exhibits on the Trinity River and its ecosystem
Trinity River Audubon Center Note the many trails and wetlands surrounding the Audubon Center!
Recreation: Moore Gateway Park Located at 8 th Street and Corinth, near the DART rail station
Recreation: Standing Wave & Santa Fe Trestle Trail Standing Wave Whitewater Course Santa Fe Trestle Trail
Recreation: Standing Wave & Santa Fe Trestle Trail DART Santa Fe Trestle Trail Corinth St. MLK, Jr. Blvd.
Recreation: Existing Trails in Rochester Park
Recreation: Future Trails Network Trinity Trails Phase I Trinity Trails Phase II
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
Transportation: Trinity Parkway Toll Road
Transportation: Trinity Parkway Toll Road Trinity Parkway complete by 2014
Transportation: Trinity Parkway Toll Road Looking South from Hampton Rd.
Transportation: S.M. Wright Parkway
Trinity Parkway & S.M. Wright IH 45 US 175 Today’s Commuter Flow Future Commuter Flow N SM Wright Freeway Proposed Trinity Parkway Ideal Neighborhood Rochester Park 45 Lamar
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
Transportation: Sylvan Ave. Bridge
TxDOT/City of Dallas project
Estimated cost $48 million
Estimated construction start late 2009 (may be delayed until 2010 bond program)
Sylvan Ave. Bridge
Transportation: Signature Bridges
Transportation: Margaret Hunt Hill Bridge Visit the webcam at www.trinityrivercorridor.org to view construction progress Margaret Hunt Hill Bridge under construction complete in 2011
Transportation: Margaret Hunt Hill Bridge Steel Fabrication in Italy Part of the center arch Central Box Girders