Tunnel Business Magazine

DEC 2018

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5 6 U P C O M I N G P R O J E C T S CALIFORNIA Los Angeles to San Francisco California High-Speed Rail The California High-Speed Rail Author- ity is building a rail link from Los Angeles to San Francisco that will allow passengers to complete the journey in just 2 hours and 40 minutes. Work is currently underway in the Central Valley. Tunnels will be required in the north across the California Coast Range between Gilr ced; and in the south in the T etween Bakersfield and Palmdale, and the San Ga - tains between Palmdale and Burbank. The alignments currently under consider- ation involve between 45 to 50 miles of tun- nels that range in length from several thou- sand feet to over 20 miles, some of which are over 2,000 ft underground. The target rev- enue service date for the Bakersfield to San Francisco segment is 2029, according to the Authority's Draft 2018 Business Plan. As part of the effort to advance the Silicon Valley to Central Valley Line of the program, the California High-Speed Rail Authority (Authority), along with its geotechnical con- sultants Kleinfelder Inc. and Fugro Consul- tants, have conducted geotechnical explora- tions in the City of San Jose and Santa Clara County. WSP is serving as the Authority's Rail De- livery Partner (RDP). Los Angeles Clearwater Program Effluent Outfall The Clearwater Program's Joint Water Pollution Control Plant (JWPCP) Effluent Outfall Tunnel Project is part of an extensive effort by the Sanitation Districts of Los Ange- les County to analyze the needs of its Joint Outfall System to the year 2050. The Efflu- ent Outfall Tunnel is envisioned to enhance the existing 8- and 12-ft tunnels with a new 37,000-lf, 18-ft ID post-tensioned concrete segmented lined tunnel. All tunneling work will be done from a single shaft located at the Districts' JWPCP located in the City of Car- son. Structures located at the start and end of the tunnel will connect to the existing Ocean Outfall System facilities. Bids were submitted in October with final award scheduled for Dec. 12. Draga- dos USA submitted a bid of $630,500,000, just under FCC Sou of $630,860,959. Other bids included Lane Obayashi JV ($653,000,000), Skanska Kenny JV ($655,997,000) and Frontier-Kemp - chels JV ($665,700,000). Construction was anticipated to start Q1 2019. Moccasin Mountain Tunnel Improvements This project for the San Francisco Public Utilities Commission (SFPUC) involves 11 miles of rehabilitation of the 10-ft diameter, concrete-lined, horseshoe tunnel, which was completed in 1925. The project designer is obs Associa A) with AE- vironmental consultant. Project design and environmental review has com- menced, and both phases are anticipated to be completed at the end of 2019. Construc- tion bidding is anticipated in late 2019 with construction scheduled for 2020 through 2026. The estimated cost is $130-140 million. Nacimiento Interlake Tunnel The Interlake Tunnel f ey County Water Resources Agency comprises an 11,000-ft long, 10-ft diameter, gravity- flow tunnel and related structures that would divert water from Lak eservoir) to Lake San Antonio (San Antonio Reservoir). The engineering firm CO een hired by the agency as Program for the proje obs Associates and GEI Inc. have been retained for preliminary engi- neering and design services for the projects. Design is 60 percent complete as of January 2019. Design-build SOQ is scheduled for Q3 2019. Construction is scheduled to begin in Q2 2020. The estimated project cost includ- ing the tunnel and spillway modification is approximately $119 million. Sacramento California Water Fix The California Water Fix Program is a comprehensive effort to improve water con- veyance in the Sacramento-San Joaquin Del- ta region. Key components of the program include a series of water conveyance tunnels that will allow for transport of up to 9,000 cfs of water directly from the Sacramento River to the major export pumping plants in the south end of the Delta. The program consists of three river intake structures, approximate- ly 10 miles of 29-ft and 40-ft ID tunnels, and approximately 60 miles of 40-ft ID main con- veyance tunnels, and a 9,000 cfs pumping facility located at the terminus of the main tunnels. The main conveyance tunnels will be configured in a parallel twin bore arrange- ment, with tunnel invert depth of averaging approximately 150 ft below ground surface. In addition to launching and receiving shafts, a series of ventilation/access shafts will be constructed along each tunnel reach. Cur- rent conceptual engineering efforts have been completed. Tunnel design is anticipated to commence in mid-2019 with the first tun- nel contracts being advertised for construc- tion bids in mid/late-2020. Subsequent tun- nel construction packages will be advertised on approximate 6-month intervals following the first contract award. Approximately five to six tunnel construction contracts will be awarded under this program. It is currently anticipated the facilities will be operational by 2033. San Jose BART Silicon Valley Extension On June 4 the Federal Transit Administra- tion issued a Record of Decision for the $4.7 billion, 6-mile BART Silicon Valley Phase II Extension into downtown San Jose. Five miles of the extension are planned to be underground, constructed by a single, large- bore order of 45-ft in diameter. The extension includes four stations (three underground). The overall project is a 16-mile extension of the Bay Area Rapid Transit sys- tem in the San Francisco Bay area. Cost esti- mates are in the range of $5 billion. Project construction is planned to start by 2021 with passenger service by 2026. A joint venture of TB and WSP agreed to a four-year, $88.3 million program management contract with the owner, Santa Clara Valley Transportation Authority (VTA). DISTRICT OF COLUMBIA Washington Potomac River Tunnel Project The Potomac River Tunnel is a component of DC Water's long-term control plan (LTCP), also known as the DC Clean Rivers Project. The Consent Decree establishes schedules for construction of the Potomac River Tunnel and other CSO control facilities under the DC Clean Rivers Project, including a 2025 dead- line to implement the project in its entirety. The Potomac River Tunnel will be located ap- proximately 100 ft below ground. CSOs cap- tured by the Potomac River Tunnel would be conveyed to the Blue Plains Advanced Wastewater Treatment Plant. MARYLAND Baltimore B&P Tunnel The B&P Tunnel is a planned replacement of the existing B&P Tunnel, which is an in- tegral portion of Amtr - dor. The new tunnel would replace the low speed, two-track brick arch tunnel, built in the 1870s with four, new single bore, high speed tunnels. The estimated construction cost is $5 billion, with a construction duration of a decade. The project is on Amtrak's prior- ity list, along with four other mega-projects – thus awaiting funding. The FRA and OT issued the Final Environmental Impact Statement (FEIS) in ember 2016 and the Record of Decision (ROD) was release ch 2017. MARYLAND-DC Baltimore-Washington NE Corridor Superconducting Maglev The Environmental Impact Statement for 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. TUNNELINGONLINE.COM TBM: TUNNEL BUSINESS MAGAZINE // DECEMBER 2018

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