Institute of Transporation Engineers (ITE) May 10, 2013 The RTD - - PowerPoint PPT Presentation
Institute of Transporation Engineers (ITE) May 10, 2013 The RTD FasTracks Plan 122 miles of new light rail and commuter rail 18 miles of Bus Rapid Transit (BRT) service 31 new park-n-Rides; more than 21,000 new spaces Enhanced
and commuter rail
Transit (BRT) service
than 21,000 new spaces
Transit Hubs (FastConnects)
Union Station
transit currently open, in or under contract
lanes extension underway (Federal Blvd. to 88th St.)
than $356 M
injected $2.7 billion into the region since 2005.
that every $1 invested in transit infrastructure translates into $4 injected in the local economy over 20 years.
Design-build (DB) Design-bid-build (DBB) Design-build-operate-maintain (DBOM) Design-build-finance-operate-maintain (DBFOM) Construction Manager/General Contractor (CMGC)
commuter rail, Amtrak, buses, taxis, shuttles, bikes and pedestrians
Authority oversees development
and County of Denver, Denver Regional Council of Governments, Master Developer
boutique hotel, restaurants and retail stores
between Denver Union Station and Civic Center area
Mall Shuttle
for faster travel than Mall Shuttle
Station in 2014
2007
“The Perfect Storm”
Costs skyrocketed Revenues plummeted
in the U.S.
34-year contract
6 years design/build 28 years operate/maintain
P3s to build out their projects
10.5-mile light rail extension Starts at existing Nine Mile Station 8 stations Serving: Aurora City Center Anschutz / Fitzsimons Campus New VA Hospital, which will serve 60,000 military veterans and their families Provides connectivity to East Rail Line at the Peoria Station Opening in 2016
(BRT) between downtown Denver and Boulder
same or better than light rail or commuter rail
stakeholders to establish BRT service standards
CDOT and corridor stakeholders on cost-effective mobility improvements to serve the Northwest area
North Metro to Longmont and BRT HNTB will lead study
improvements and third-party funding options
(MOU) have been signed by all parties agreeing to the process
completed in early 2014
19,300 – 2013 29,700 – 2030
March 2004 – West Rail Line RFP released May 23, 2006 – RTD’s selection committee selected Denver Transit Construction Group (DTCG) June 2006 – NTP for Pre-construction Services contract July 2007 – Change order for track removal March 2008 – Early work and material procurement under LONP June 2008 – Guaranteed Maximum Price submitted June 2009 – NTP for Construction
PHASE ONE: Contractor provided professional services like scheduling, planning, and cost estimating in preparation for entering into construction, but not performing construction, although the contract was amended in 2008 to allow for some early construction work. PHASE TWO: Precedent to phase two, DTCG had the first opportunity to negotiate the construction contract. If parties were unable to reach an agreement on guaranteed maximum price, RTD reserved the right to award the contact to another contractor. Construction began. As General Contractor, DTCG manages their work, including their sub-contractors. RTD’s role is to provide project management and construction oversight.
2005 Final Design Begins June 2009 Construction Begins Jan-Feb 2013 Integrated testing March – April RTD Operations Testing April 26, 2013 West Rail Line Open to Public
12.1 miles 9 double track, 3.1 single track
10 Light Rail Bridges 3 Street/Highway Bridges 3 pedestrian bridges
20 at-grade crossings 14 grade separations 10 road closures
I-70 and Union Boulevard
4.26 miles
Retaining Ballast Mechanically Stabilized Earth Soil Nail
12 Stations 6 kiss-n-Ride 6 with parking 11 new 1 relocated
Subsurface conditions in some locations, such as Auraria and Jeffco were not conducive to building structures Coordination between station foundation and utilities
Was challenging to service locations along the rail line
Contractor worked well overcoming various issues Ability to collaborate between Owner and Contractor
City betterments were challenging
Contracts that are split out can cause challenges
To determine which utilities were in conflict with the proposed RTD construction, the proposed construction design drawings were reviewed at
During design Subsurface Utility Engineering was performed to minimize the impact of utility reconstruction Worked with DEA and utility owners to:
construction costs to relocate utility facilities
Issues relocating all overhead and underground utilities located in the same alignment as the proposed LRT guideway
DTCG was responsible for wet utility relocates with the exception of CMWC water facilities RTD utility team was responsible for the design and construction of existing dry utilities that were in conflict with the proposed LRT construction. All dry utilities were completed by the utility owners: Xcel-Gas Operations, Electric Distribution, Transmission;
CenturyLink; Comcast; Level 3; and Zayo
CenturyLink
asbestos
Wadsworth into 14th Avenue
Independence which saved CenturyLink money and construction time
Xcel Energy and Comcast
Avenue from Quail to Harlan with Comcast attached to their power poles
Included:
348 work orders 295 Dry Utilities
Relocating utilities began too soon Value engineering drawing integration—good in some aspects, but there were aspects that were not taken into account Knowing municipality and the standards ahead of time
requirements are for utilities
Coordination among stakeholders Coordination between DTCG and RTD
there was an issue DTCG would address RTD and vice versa
Both tunnels were constructed in phases to minimize construction impacts to the public:
Importance of stockpile location:
coordination
excavation, not dirt removal
Unforeseen design issues at I-70 Tunnel
Design: I-70 incorporated precast planks whereas Union Tunnel was a slab-on-grade
required DTCG to spend additional time compacting subgrade
Coordination included:
Coordination involved:
The coordination among parties, prior to construction:
positive comfort level
would have progressed quickly or
and shutdown needed full partnership
Accelerated bridge construction allows for tunnels and bridges to be constructed in a quick fashion with minimal disruption to the traveling public
Contractor should be heavily involved with the physical design of the project, when applicable
required to build structures
mitigate unforeseen issues during construction
Examples:
the inception of the tunnel—design, phasing, procurement, to actual construction
schedule DTCG had to make the design plans fit field conditions
RTD considers track subgrade to be as important to track performance as the rail and ballast
effective exploration and testing program during the design process to include collection and analysis of detailed information
Subsoil or foundation for the track subgrade is required to satisfy same basic requirements of a continuous spread foundation
constructed subgrade
avoid conditions such as sink holes and springs under the fill
Fills, embankments, or select granular fill materials (supplied by off-site commercial sources)
desired level for track subgrade
levels or snow depths, eliminate undesirable topographic variations, and achieve design grades
RTD track subgrade
underdrain system
Expansive subsoils: Westernmost portion of rail line overlies a bedrock zone consisting of nearly vertically inclined layers
potentially expansive soils with controlled compacted select granular fill materials
Artificial fills: Includes soils (clay, silt, sand, gravel) and debris including extensive deposits of trash or landfill type
engineered fill
could have been better: Minimization of the costs associated with the above unforeseen conditions can be achieved through a comprehensive exploration and testing program during the design process. Prior to project, RTD lowered and redesigned major gas and fiber optic lines, however, smaller feeds weren’t necessarily taken into account
Crews discovered areas with unsuitable material
analysis—provided guidance to ensure wall embankments would not swell or settle
Coordination with various stakeholders to ensure phasing plans and haul routes
Value Engineering Wall caissons Geotech allowance Foundation and wall construction
DTCG/RTD performed value engineering (VE) for many walls in an effort to change wall types
Cast-in-Place, etc.)
When accessible contractor would slip-form ballast walls rather than form and pour
All utilities need to be relocated or installed before constructing With MSE walls, take into account the utility duct bank, OCS foundations and the MSE straps
Wet and dry utilities needed to be out of the footprint
Bridges were built, or reconstructed over waterways, creeks, roadways, guideway and channels
waterways and wetlands
Various bridges were assessed to be changed from steel to concrete
Because the construction and reconstruction of bridges were completed in phases there were minimal impacts to the traveling public Allowed various stakeholders to have input on final design elements for betterments to their community
partnership, and ownership
Some bridge designs didn’t fully account for the utility duct banks that were to be constructed on the bridge— expansion vaults, conduits, etc.
Three new Call-n-Rides
303.483.8283
Personalized bus service that travels within select RTD service areas. Flex routes during high-traffic hours, as a service to commuters, scheduled stops in designated areas.
celebrations with the Grand Opening Ceremony at the Jefferson County Government Center/Golden Station and free West Rail Line rides for the remainder of the day.