Tunnel Business Magazine

AUG 2018

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Page 38 of 43

U P C O M I N G P R O J E C T S 3 9 TUNNELINGONLINE.COM TBM: TUNNEL BUSINESS MAGAZINE // AUGUST 2018 er- c oject is underway with the Record of Decision anticipated in 2019. Construction is planned for 2020. The first leg comprises 60 km from Washington to Balti- more, 75 percent of the alignment in tunnel, and three underground stations (Washington, Baltimore and BWI Airport). The total cost is ov ted as a single bore with guideways (outside tun- nel diameter approximately 15m). Five or six e anticipate Prime Consultant: Louis Berger; Tunneling subconsultant: Gall Zeidler. MISSOURI St. Louis Project Clear Tunnels opolitan St. Louis Sewer District ) has begun an ambitious program called Project Clear, a multi-billion dollar in- vestment addressing wastewater overflows. The system improvements include con- struction of nine tunnels to control sewer overflows. Upcoming tunneling components of Project Clear include (Project, Construction Begin, Construction Cost Estimate, Tunnel Length, Tunnel Diameter): • L es Peres Storage Tunnel, 2020, $631,000,000, 9 miles, 30 ft dia • University City Sanitary Storage Fa- cility, 2018, $40,000,000, 1,250 ft, 30 ft dia • L amec Tunnel, 2018, $170,000,000, 6.8 miles, 8 ft dia • River Des Peres Tributaries CSO Tun- nel, 2024, $375,000,000, 12,144 ft, 20 ft dia • Upper River Des Peres CSO Storage Tunnel, 2028, $226,000,000, 8,976 ft, 24 ft dia NEW YORK New York Flushing Bay CSO epartment of Envi- ronmental Protection has begun drafting an RFP for design of 2.5-mile long, 25 million gal- lon CSO tunnel in Queens as part of a Long- Term Control Plan. The tunnel is expected to be 18-20 ft in diameter an estimated cost of between $670 million $829 million for the preferred alternative. Preliminary plans en- vision construction occurring from 2026 to 2035. DEP expects to initiate design in 2019. Web: www.nyc.gov New York Hudson Tunnel Project/Gateway The Hudson Tunnel Project is a new two- track heavy r Corridor from the Bergen Palisades Jers ttan that will directly serve Penn Sta onsists of three major elements: the Hudson Yards right-of- way preservation project, the Hudson Tun- nel, and the rehabilitation and moderniza- er tunnel. A joint venture of WSP has been awarded the design contract. The tunnel portion of the contract, estimated at $12 billion to $13 billion, is envisioned to be a design-build contract including the Pali- sades Tunnel and Hudson Tunnel. Construc- tion was expected to begin in 2019 but un- certainties regarding funding may impact the schedule. The project was expected to receive a Final Environment Impact State- ch 2018. The Hudson Tunnel Project is part of the ateway Program, a series of strategic rail infrastructure investments designed to improve current service and cre- ate new capacity. The Port Au ey (P ently serves as the project sponsor, but the project is a joint undertaking that also includes Amtrak ey Tr er Tunnel, opened in 1910, is owned by Amtr and Amtrak operate approximately 450 trains each weekday through the tunnel that carry over 200,000 daily passenger trips. er Tunnel presents reliability challenges due to damage from Superstorm Sandy in 2012, as well as the overall age the tunnel and the intensity of its current use. Significant delays to a large number of trains occur when problems arise. The benefits of the Hudson Tunnel Project are twofold. First, the new tunnel will enable the closure of the existing tunnel for recon- struction without causing a significant re- duction of capacity. Second, once renovations er Tunnel are complete, its reopening will provide greater operational flexibility and system redundancy in the event of malfunction. Preparation of an Environmental Impact Statement is currently underway, and was expected to be complete ch 2018. The selection of a locally preferred alternative and its incorporation into the region's fiscally constrained long-range plan was expected to occur in the first quarter of 2018. The original schedule projected both the new tunnel and the rehabilitated tunnel open for revenue service by 2028. New York Second Avenue Subway – Phase 2 Design is underway for the Phase 2 of the second Avenue Subway. A joint venture of WSP and STV is working on the design for the project that extends the line northward from 96th Street to 125th Street – a total of 1.5 miles with three new stations. The alignment will use some existing tunnels originally built in the 1970s, in addition to new soft-ground ost estimate for this phase of the project is $6 billion, with revenue ser- vice anticipated between 2027 and 2029. OHIO Cleveland NEORSD Project Clean Lake Project Clean Lake f Regional Sewer D ) includes several major tunnel components to store and convey combined sewer overflows. The projects include: • Westerly Storage Tunnel – 9,600 ft of 25-ft diameter tunnel. The design con- tract was awarded to a joint venture in fall 2015 and also includes a $28 million 46-ft diameter, 200-ft deep submersible Tunnel Dewatering Pump Station. The Westerly Storage Tunnel advertised for bid in Q4 2017, ch was awarded to Jay Dee-Obayashi for $135 million. The Westerly Tunnel Dewa- tering Pump Station will bid in 2019; • Shoreline Storage Tunnel – 15,300 lf of 21-ft diameter soft ground CSO tunnel. It is anticipated to bid in 2021; • Shoreline Consolidation Sewer – 11,700 lf of 9.5-ft diameter soft ground tunnel. It is anticipated to bid in 2021; • Southerly Storage Tunnel – 18,340 lf of 23-ft diameter CSO tunnel. It is antici- pated to bid in 2024; • Big Creek Storage Tunnel – 22,400 lf of 18-ft diameter CSO tunnel. It is antici- pated to bid in 2029. PENNSYLVANIA Pittsburgh ALCOSAN CSO Tunnels The Allegheny County Sanitary Author- ity (AL ogram to control combined sewer overflows (CSOs) as part of a consent decree with EPA. The $2.8 billion system improvement program is expected to include tunnel segments to store and treat overflows. The improvements are slated to be complete by 2026. The tunnels include: Ohio River Segment (1.9 miles, 12-14 ft in diameter, $84 million); Allegheny River Segment (3.6 miles, 12-14 ft in diameter, $136 er Segment (4.5 miles, 12-14 ft in diameter, $152 million). Additionally, the program will include inter- ceptor and consolidation sewers, dewatering pump station and treatment plant improve- ments. To date, a formal agreement has not been reached, so plans are not finalized. RHODE ISLAND Pawtucket/East Providence Pawtucket Tunnel agansett Bay Commission C) has begun conceptual design of the third and final phase of its Combined Sewer Overflow Program. Phase III includes the Pawtucket T C's second CSO stor- C completed the Providence Tunnel, a 16,500-ft long, 26-ft diameter CSO storage tunnel, in 2008 during Phase I of its CSO program.

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