d2 subway - dart.org · public meeting november 13, 2019 • to update the community on d2 subway...
TRANSCRIPT
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D2 Subway
Public Meeting
November 13, 2019
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• To update the community on D2 Subway progress since last meeting in April 2019
• To get your feedback on:
– In progress 20% level of design
o Proposed street modifications
o Urban design plans
o Subway station concepts and access points
• IH 345/D2 Design Coordination Status
Purpose of Today’s Meeting
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D2 Subway Alignment
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Engineering and Proposed Street
Modifications
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• Several activities in progress for 20% design submittal in March 2020
– Finalized alignment/profile assumptions (see roll plots)
– Initiating design for street modifications
– Geotechnical report based on boring data along corridor
– Construction Methods Report
– Field surveys complete including visible utilities
– As-built research complete for underground utilities
– Building foundations data collected – Six key buildings/features along Commerce will have supplemental survey
Engineering Progress Update
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Construction Methods
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• Tunnel construction approaches:
– Sequential Excavation Method (SEM)
– Tunnel Boring Machine (TBM)
– Cut-and-Cover
• DART will likely leave final method(s) up to contractor based on best time/cost efficiencies and considering staging area needs
SEM
TBM
Cut-and-Cover
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Proposed Street Modifications Victory/Museum Way Focus Area
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Museum WayRemove median parking and construct D2 with embedded track
Victory Park LanePossibly remove north-south through movement to right-in, right-out only
River StreetCrossing panel by DART for future through street
Futu
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Potential street opportunity
Broom StreetRelocated closer to freeway; lowered slightly at rail crossing
McKinney AvenueLowered slightly at rail crossing
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Museum Way Cross-SectionHouston Street to Victory Avenue
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• DART owns 35’ of median right-of-way
• Current approach is to revise cross section to include parking lane along sidewalk and 10’ travel lane
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Proposed Street Modifications North Portal/Metro Center Area
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Hord StreetRebuilt over D2 and remains open
Griffin StreetCut and cover construction temporary impacts; to be rebuilt
Corbin StreetTo be closed due to portal
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Proposed Street Modifications CBD East and Deep Ellum Focus Area
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IH 345 Frontage RoadNorthbound road closed from Pacific to Swiss; possible local access south of portal
Good LatimerSections reconstructed with embedded track and relocated median station
Good Latimer to Live OakSouthbound left turn lane closed due to track widening for station
Miranda StreetClosed
Hawkins StreetAt-grade crossing; proposed reconstruction to align with Jett Way
Swiss AvenueProposed one-way westbound from Good Latimer to Hawkins
Rebuilt Street CrossingsCut and cover construction temporary impacts
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Urban Design and Station Plans
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• Creation of pedestrian friendly stations that are accessible, safe, encourage transit ridership and contribute to the public realm through street-level activation and high quality materials and detailing
• Contribution to a sustainable urban environment that follows low impact development standards and incorporates appropriate native landscaping
• Integration of streetscapes that enhance and encourage pedestrian activity while safely accommodating all other modes of transportation.
• Enhancement of economic development potential along transit corridors and transit-oriented development around station
Urban Design Principles
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DART Station Design Principles
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Seamless, intuitive path of travel
Highly visible entries, street presence
Clear passenger information
Minimal blind spots
Avoiddead ends
Natural light to enhance wayfinding
Intermodal integration
Enhanced urban realm
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Museum Way Station Urban Design Plan
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Museum Way Station Urban Design Plan
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Museum Way Station
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• Museum Way will be similar to Akard Station
• Side platform with canopies
• Opportunity for coordinated design with Perot Museum
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Metro Center StationArchitectural Concept
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Commerce Station HeadhouseProposed approach to avoid Cut-and-Cover along Commerce Street
Commerce Subway Station Cavern
Pas
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Acc
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WB Tunnel
EB Tunnel
WB Tunnel
EB Tunnel Egress Shaft
Station Head House
Pegasus Plaza
1517 Commerce StParking
Neiman Marcus
MercantileNational Bank
Building
AT&T CorporateHeadquarters
The Adolphus
Iron Cactus
The Joule Hotel
BrowderStreet Mall
AT&T Discovery District
Hampton Inn& Suites
DP&L Flats
Aka
rdSt
The Magnolia Hotel
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Commerce StationArchitectural Concept
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Pegasus Plaza Headhouse Concept
Pegasus Plaza
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Pegasus PlazaExisting Condition
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Opportunities• Arrival portal to heart of downtown• First Dallas experience for visitors• Renewed purpose for Plaza• Retains plaza design• Can help activate the park• Blend station with Plaza• Links public uses – Plaza/Station
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Pegasus Plaza Headhouse Concept
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Pegasus PlazaHeadhouse Concept
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CBD East Station Architectural Concept
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MainElm
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East Portal Urban Design Plan
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East Portal Urban Design Plan
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Live Oak StationRelocation of Deep Ellum Station
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• Community desire to retain station in this area
• Median station similar to today
• Objective is to remove ballast and use embedded track for more urban feel along Good Latimer
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FTA TOD Planning Grant Opportunity
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• DART and the City of Dallas are partnering on grant opportunity for comprehensive transit-oriented development (TOD) plan along D2 Subway Corridor
– Plan must be associated with a fixed guideway or core capacity project
– Anticipated 2 year effort as sub-plan concurrent with city’s comprehensive plan update
• TOD Pilot Program intended to fund:
– Comprehensive planning that supports economic development, ridership, multimodal connectivity and accessibility, increased transit access for pedestrian and bicycle traffic, and mixed-use development near transit stations
– Encourages identification of infrastructure needs and engagement with the private sector
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Supplemental Draft Environmental Impact
Statement
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• Supplemental Draft Environmental Impact
Statement (SDEIS) in progress
• Initiated early reviews with FTA staff
• SDEIS will include information in potential
impacts and benefits of the project, along
with mitigation options where impacts are
identified
• Coordination with several entities, including:
City of Dallas, Dallas Park and Recreation
Board, Texas Historic Commission, TxDOT,
private property owners, utility providers
SDEIS Progress
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Agency Coordination Efforts
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• DART, City of Dallas, TxDOT and NCTCOG staff have met several times to discuss design interface
• TxDOT approval of a crossing permit pending completion of Feasibility Study – this could be 2-3 years or longer
– TxDOT would prefer DART at-grade crossing under IH 345
• DART continues to advance D2 Subway with portal at IH 345 but has reviewed other options with agency staff
• DART has also participated in interviews with Coalition for a New Dallas IH 345 study team
• Policy-level discussions are occurring to provide guidance
IH 345 Interface Coordination
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FTA Considerations & Next Steps
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• Project Development is the first phase of the federal funding process
• DART is doing Project Development locally and will request entry into Engineering after this phase is complete
FTA Capital Investment Grant Process
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• D2 received MEDIUM-HIGH ratings in 2015, 2016, 2017
• Project refined as subway in September 2017
– No formal rating submittal in September 2018
• FTA deadline for Project Ratings in 2019 was August 23
• DART provided letter to FTA with project update (no formal rating request at this time) and key milestones for next phase
• Early 2020, begin coordination to enter Engineering
• August 2020 – DART will request rating
FTA Coordination
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Key Milestones for FTA Schedule
Activity Date
10 percent design complete March 2019
Advance notice of Request to Enter Engineering
- Initiate Readiness Documents
February 2020
20 percent design March 2020
Draft Supplemental Environmental Impact Statement March 2020
30 percent design August 2020
Final Environmental Impact Statement/Record of
Decision (FEIS/ROD)
August 2020
Entry into Engineering
- FTA Rating
- Readiness documents review complete
Late 2020/
Early 2021
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