Item 6c Supp
Item No. 6c_supp . Meeting 1/27/09 . Alaskan Way Viaduct / Seawall Replacement Programep ace e t og a Port of Seattle Commission January 27, 2009 Port of Seattle relies on an efficient transportation systemffi i t t t ti t The Port of Seattle is an international gateway creating jobs and economic growth forjobs and economic growth for the region in an environmentally responsible way. We must have a transportation system that moves people and cargo quickly and efficiently. 2 Port of Seattle relies on an efficient transportation systemffi i t t t ti t Our priorities for a viaduct replacement: provides sufficient capacity to move freight traffic efficiently grants easy access to our cargo, commercial fishing cargo commercial fishing and cruise facilities and Sea-Tac Airport minimizes construction disruption 3 Port of Seattle relies on an efficient transportation systemffi i t t t ti t Without the capacity and connections we need, cargo and Without the capacity and connections we need cargo and the jobs associated with it will go away, and the thousands of businesses dependent on maritime, trade and passenger activities will be in jeopardy. 4 Bored Tunnel Hybrid Alternative On Jan. 13, 2009, Governor Gregoire, King County Executive Sims and Mayor Nickels announced that the bored tunnel hybrid alternative was their preferred solution to replace the central waterfront portion of the viaduct. 5 State, City and County Guiding Principles The three executives agreed that any solution for the Alaskan WayThe three executives agreed that any solution for the Alaskan Way Viaduct needed to be grounded in a commitment and integration across six guiding principles: Improve public safety. Provide efficient movement of people and goods now and in the futurethe future. Maintain or improve downtown Seattle, regional, the port and state economies. Enhance Seattle's waterfront, downtown and adjacent neighborhoods as a place for people. Create solutions that are fiscally responsible.Create solutions that are fiscally responsible Improve the health of the environment. 6 Funding Strategy for Bored TunnelF di St t f B d T l Proposed Project Implementation Responsibility State King County City of Port of Costs MVET Seattle Seattle *** Moving Forward and Prior $600 million $300 million $900 million* Expenditures SR 99 Bored Tunnel $1.9 billion** $1.9 billion Alaskan Way Surface Street and $290 million $100 million $390 million Promenade Central Seawall $255 million $255 million Utility Relocation $250 million $250 million City Streets and Transit Pathways $25 million $190 million $215 million Transit Infrastructure and Services $115 million $135 million $250 million Construction Transit Service $30 million $50 million $80 million Total $2.82 billion $190 million $930 million $300 million $4.24 billion Transit Operations Annual Cost $15 million $15 million *Reflects cost savings from Moving Forward program realized by not repairing the viaduct from Lenora to Battery Street *R fl t t i f M i F d li d b t i i th i d t f L t B tt St t Tunnel and not completing the second phase of fire and life safety upgrades to the Battery Street Tunnel. **Reflects the most likely cost based on a conceptual design. The potential cost range is between $1.2 billion and $2.2 billion. ***Agreement in concept for up to $300 million subject to Port of Seattle Commission review and approval. 7 Next Steps Before the bored tunnel can be designed and built, theg WSDOT team needs to: Get legislative approval for necessary funding. Work with the city, county and port to coordinate project implementation. Complete environmental review process.Complete environmental review process. Develop additional preliminary engineering and soils exploration. Meet with community groups and businesses to finalize design. 8 Program Timeline 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Relocate electrical lines between S. Massachusetts Street and Railroad Way S. Replace the viaduct from S. Holgate to S. King streets Implement Moving Forward transit enhancements and and other improvements other improvements Mercer Street construction from I-5 to Dexter Avenue S. Spokane Street Project construction Bored tunnel env. documentation Bored tunnel construction Alaskan Way and waterfront promenade construction* 9 *Seawall construction will take place before Alaskan Way and promenade construction Bored Tunnel Timeline 2009 2010 2011 2012 2013 2014 2015 Environmental review and preliminary design Right-of-way acquisition and permitting InitiatI iti t e con ttractiti ng: ttunnel l b b orii ng machine and hi d design-build contract Major construction Bored Bored tunnel open to drivers tunnelopen to drivers 10 Port Project Needs December 2008 LetterDecember 2008 Letter The choice for the replacement of the Alaskan Way Viaduct should achieve the best balance of:should achieve the best balance of: job retention and creation sustainable regional economic vitality environmental benefits 1. Maximize jobs and economic benefits in weighing total, life-cycle costs 2. Ensure efficient access to the working waterfront for a growing economy 3.3 Enhance the waterfront environment for people & goods 4. Replace capacity for long-term regional growth 5. Support seawall improvements 11 Replace capacity for long-term regional growthregional growth The bored tunnel alternative: Maintains capacity in the SR 99 corridor. The tunnel will carry 85,000 vehicles through downtown Seattle each day at year of opening (with room to grow). Surface Alaskan Way will carry about 25,000 vehicles daily.S f Al k W ill b t 25 000 hi l d il Today's Viaduct carries approximately 110,000 vehicles daily. Accommodates in-city trips through new investments in local Accommodates in city trips through new investments in local streets and transit. New bus service will carry approximately 17,000 additional daily riders, primarily serving northwest and southwest Seattle. Reduces congestion and single occupant vehicle idling. Preserves Interstate 5 for state and regional through trips with expanded north-south vehicle capacity and improved travel times.expanded north south vehicle capacity and improved travel times 12 Maximize economic benefits in weighing total costi i hi t t l t The bored tunnel alternative: Enables continued growth in Port operations. Maintains today's travel times for Maintains today's travel times for trips through downtown. Minimizes construction disruption. Improves design for lane andp g shoulder widths and modernizes fire, life and safety standards. Structural engineers agree that tunnels are one of the safest placestunnels are one of the safest places to be during an earthquake. Maintains and creates 10,000 jobs each year over the course of the project.project 13 Ensure efficient access to the working waterfront for a growing economyt f t f i The bored tunnel alternative: Minimizes construction impacts to waterfront businesses and the local community. Provides room for freight and port traffic to grow.g Surface street improvements include key east-west arteries: Spokane St, SR519, Mercerp , , Corridor, and East Marginal Way. 14 Enhance the waterfront environment for people and goodsp p g and Support seawall improvements The bored tunnel alternative: Creates a new system to improve Creates a new system to improve and handle storm water runoff. Moves SR 99 underground and eliminates existing viaduct noiseeliminates existing viaduct noise, shadowing and view blockage. Creates new transit, bike and pedestrian connections. Reconnects downtown with the natural environment in Elliott Bay. Creates a memorable place for people to live, work and play.l li k d l 15 Key Port components - South End Holgate to King - Elliott/Western/15th Ave W connections - Complementary street upgrades: Spokane Street Corridor, East Marginal Way, SR 519, Duwamish ITS, Mercer Corridor - Transit investments for commuter trips - Construction/Business impact mitigation - Seawall replacementSeawall replacement - Viaduct risk mitigation 16 On-going Port questions What is the design for the other essential street network connections?connections? What is the most efficient surface connection for NW Seattle and freight mobility? How will other components surface street be improved? How does the tunnel connect to the street network, particularly at the South End? What are the risks for the funding plan?What are the risks for the funding plan? How will other agencies' contributions impact operating costs of our tenants and businesses? What are the partnership risks as Tunnel Alternative requires further approvals? How will the Port decide its participation?H ill th P t d id it ti i ti ? 17 Next Steps for Port of Seattle In transitioning to a new partnership, we need to: Work with the state, city and county as they proceed with central waterfront project implementation. Their initial tasks include: Resolve open design issues. Develop additional preliminary engineering and soils exploration. Complete environmental review and community involvement.Complete environmental review and community involvement Secure necessary legislative approvals. Continue collaboration on Viaduct South End and other early projectsContinue collaboration on Viaduct South End and other early projects. Assess funding partnership opportunities for Port of Seattle. 18 Back PocketBack Pocket 19 Presentation Agenda 1. Bored Tunnel Hybrid Alternative 2. Guiding Principles and Decision-Making Process 3. Tunneling Technology 4. SR 99 Bored Tunnel 5. Bored Tunnel vs. Cut-and- Cover Tunnel 6.6 Successful Delivery of Bored Successful Delivery of Bored Tunnels 7. Bored Tunnel vs. Big Dig 8. Next Steps 9. Schedules 20 Decision-Making Process Along the way, three groups met regularly to review technical analysis and weigh-in on the options considered for replacing the central waterfront. Those groups were: Stakeholder Advisory Committee: - 29 individuals representing communities, economic interests and cause-driven organizations. - Met 16 times over a 13-month period to review and provide comment to program staff. Interagency Working Group: - 14 agencies reviewed and provided input on the technical details of waterfront replacement options. Executive Oversight Committee: - Included the Governor, King County Executive, Mayor, State Senate Transportation Chair, State House Transportation Chair, King County Council Transportation Chair and Seattle City Council King County Council Transportation Chair and Seattle City Council Transportation Chair. 21 - Reviewed options an analysis throughout the 13-month period. Tunneling Technology Tunneling technology is rapidly advancing, with tunnel boring machines as large asboring machines as large as 62 feet in diameter on order. Seattle Successful tunnel boring machine projects:b i hi j t Sound Transit Beacon Hill: 21 feet in diameter Hamburg and Moscow: 46.6 feet in diameter Madrid: 50 feet in diameter Shanghai: 50.6 feet in diameter diameter 22 Tunneling in Seattle Soils Numerous tunnel machines, including several in Seattle, have successfully excavated ground conditions similar to those anticipated. Over 150 tunnels have been constructed in Seattle since 1890, mostly in glacial soils. Examples include:i l i l il E l i l d Sound Transit Beacon Hill: Glacial sand, silt, clay and till Glacial sand silt clay and till up to 160-ft depth. Soils were similar to the hard/dense soils along most of h d/d il l t f proposed alignment. Denny Way CSO: Glacial sand, silt, clay and till up to 160-ft depth. Soils were similar to hard/dense soils along most of proposed alignment. 23 Bored Tunnel Hybrid Alternative SR 99 Tunnel: 54' diameter, single bore tunnel.g Two lanes of traffic in each direction. ppAroximately 1.7 miles long.y g Between 30 and 200 feet underground. Carries approximately 85,000 vehiclesCarries approximately 85,000 vehicles each day through downtown Seattle. Construction is expected to begin in 2011 and be open to drivers in 2015be open to drivers in 2015. Alaskan Way surface street: FoFour-lane roadway with two lanes in each direction.r lane road a ith t o lanes in each direction Carries approximately 25,000 vehicles per day. 24 SR 99 Bored Tunnel Cost Risk-based estimating nationally recognized as a best practice or mega-projects Cost (Millions) Construction Estimate (bored tunnel only) $944 Construction Management and Administration $118 Preliminary and Final DesignPreliminar and Final Design $118 Contingency $150 Risk $268 Escalation (per Global Insight) $166 Right-of-Way Costs $149 TOTAL $1,913 25 CEVP-Type Cost Range Most Probable Cost (Range) 20% chance the cost is less than $1.2 billion 60% chance the cost is 60% chance the cost is less than $1.9 billion 80% chance the cost is less than $2.2 billion 26 Bored Tunnel vs. Previous Cut-and-Cover Tunnel Alternative Bored Tunnel Previous Cut-and-Cover Hybrid AlternativeH b idAlt ti Tunnel AlternativeT lAlt ti Stacked with two lanes in each Stacked with three lanes in each direction. direction. Constructed under First Avenue. Constructed along the waterfront. Top of tunnel is 30 to 200 feet below Top of tunnel is 10 feet below the the surface. surface. Viaduct can stay open to traffic Viaduct would have been closed for while the tunnel is being built. 3.5 years under the "short" construction plan. Construction is estimated to take Construction is estimated to take 4.5 years. Construction was estimated to take 7 years under the "short" Limits impacts to waterfront construction plan. businesses.businesses Would cause major impacts to waterfront businesses. 27 Successful Delivery of Bored Tunnel Projects EExamples of Tunnel Excavation in Urban Areasl f T l E ti i Elbe Tunnel Slurry MachineU b A 1. 4th Elbe River, Hamburg: Successfully excavated 1.6 miles at 46.6-ft-diameter. 2. Lefortovo Tunnel, Moscow: Rebuilt Elbe TBM successfully excavated 2 bores each 1.4 miles long at 46.6-ft-diameter. Same machine refurbished for another 2 tunnels in Moscow. 3. Madrid M30 EPB: Successfully excavated 2 bores each 1.3 miles long at 50-ft-diameter by 2 closed-face TBMs built by different manufacturers. M30 diameter was about 10 ft larger than previous TBMs (~50% greater face area). Madrid Calle M30 4. Shanghai Yangtze River Mixshield: Successfully excavated 2 bores each 4.6 miles long at 50.6-ft-diameter. This TBM is the current record holder for diameter. Tunnel completed about a year ahead of original schedule.completed about a year ahead of original schedule Pending Record Holder Moscow Road/Rail Tunnel: A 62-ft-diameter Mixshield hasM R d/R il T l A 62 ft di t Mi hi ld h been ordered. This diameter is 11-ft larger than Shanghai TBM, the current record holder. Seven tunnel boring machines will be used in 28 the Madrid Calle 30 project Alaskan Way Bored Tunnel vs. Boston's Big Dig More differences than similarities Bored Tunnel Big Dig & South End & S th E d PProjectsj t Project Boston's Big Dig Central Artery/Tunnel Substantially larger and more complex Total Project Length 2.8 miles 8 miles including: Number of tunnels* 1 3 1. Very disruptive cut-and-cover tunnel through the Length of tunnels* 2 miles 5 miles central city under the existing elevated roadway and 2 Total lane miles 12.8 miles >161 miles subway lines. *Boston Big Dig tunnels included cut-and-cover, immersed 2. A signature cable-stayed bridge over the Charles tubes, jacked tunnel and other special tunneling methods. River, cut and cover through South Boston.River cut-and-cover through South Boston 3. Two sets of immersed tubes under the harbor to the SR 99 Bored Tunnel airport and the complex interchange with very poor Project will run 30-200 feet underground geotechnical conditions. minimizing traffic disruption and impacts to the Project was disruptive and required extensivej p waterfront and downtownq traffic management and mitigation. WSDOT uses the CEVP process on all state The initial project cost number did not include projects over $100M to ensure costs are complete, added scope, mitigation and environmental reasonable, defendable and appropriately requirements, inflation andq ,appropriate pprepresent risk and uncertainties.p allowance for risk and escalation. WSDOT is a strong owner in policy, management and technical capability and Governor Gregoire is The Central Artery/Tunnel did not have a project authority strong agency management or consistent leadership throughout the course of the WSDOT will maintain this strength over the life of project. the project, assisted by eminent private-sector engineers and contractors As a result, the project was delivered grossly 29 over budget and years behind schedule. - Accountable to the public, Governor and Legislature Alaskan Way Viaduct and Seawall Replacement Program Follow our progress: www.alaskanwayviaduct.orgFollow our progress: www alaskanwayviaduct org 30
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