Assessment of ground conditions anticipated for phase 1 comprising 4.8 km-long, 7.9 m-diameter main spine tunnel; a 9.1 m-diameter shaft at each end for TBM installation and recovery; seven intermediate vertical drop shafts with connecting adits; and a large circular shaft at the southern end to house the pumpstation. Sandstone, siltstone/shale and graphitic shale predominate, with coal appearing in places. Long reaches at the southern end of the alignment are anticipated to be in good-to-average rock. Bidding expected year 2000. More information from Haley & Aldrich, fax +1 617 886 7600. November 1999. Chamber 22 m high x 22 m wide x 38 - 48 m long in design for pump station at south end of spine tunnel. Visit www.haleyaldrich.com Sept 2000.   Construction of three-phase CSO programme will commence mid-2001. Bid documents available mid-May and prebid meeting rescheduled for date to be advised in June, 2001 for phase 1 contract 01:302.06-C for 5.01 km-long, 8.27 m-diameter main spine tunnel in rock; seven adits totalling 1.3 km; two 8.27 m-diameter, 79.57 m-deep work shafts; tunnel pump station cavern 95.5 m-deep, 37.2 m-long x 19 m-wide x 20.7 m-high, connected to surface by 10.18 m-diameter utility shaft and 3.5 m-diameter access shaft; one 2.86 m-diameter drop shaft with 95 cm-diameter vent shaft, 76.38 m-deep. Contact ghughes@louisberger.com 16/01. Administrative delays on the preparation of contract 01:302.06-C (Tunnel) for the Narragansett Bay Commission have led to a resheduling of the tender for Contract 6 as follows: the contract will be advertised on 4th June, 2001; the prebid conference is on 19th June; bid opening 21st August; award will be made during early October, with notice to proceed on 1st November. Contact is Joseph Pratt, tel +1 401 521 5980, or visit www.louisberger.com 22/01. Bids opened 25th September for Narragansett Bay Commission Main Spine Tunnel and Ancillary Facilities, Contract 01:302.06-C as follows: Shank/Balfour Beatty, $163,527,245; JF Shea/Frontier Kemper, $167,600,000; Modern Continental, $227,357,950. Engineer's Estimate, $174,995,088. More from ghughes@louisberger.com or visit www.louisberger.com 40/01.In Providence, the Shank/Balfour Beatty jv has been awarded the contract to build a 5 km waste water tunnel, the Combined Sewer Overflow, in the Narragansett Bay. Visit http://narrabay.com 05/02.76 m-deep 4.9 km-long 7.92 m ID tunnel under Rhode Island's capital Providence under construction by Shank/Balfour Beatty JV using a Hitachi Zosen TBM. Lining with precast concrete segments and concrete final lining. Work on the USD318 million first phase of the CSO project began in May 2001 and is scheduled to be completed in spring 2008. The tunnel under construction will stretch from the Field's Point wastewater treatment plant to a foundry complex just west of downtown. The tunnel is designed to hold 235 million litres of the sewage-rainwater mix that would otherwise overflow sewer lines and flow into the Woonasquatucket and Providence Rivers. The project also includes a 35.66 m-long x 18.4 m-wide x 19.8 m-high cavern excavated using the drill/blast method by an Atlas Copco two-boom jumbo, six shafts and several adits.Two more phases are planned after that, possibly ending in 2020, which would involve building more pipes connected to a second wastewater treatment plant at Bucklin Point in East Providence, and constructing another 4.8 km tunnel from that plant to Central Falls. Total cost could reach USD1 billion. Visit www.narrabay.com 03/05.

Bidding alert for construction of Woonasquatucket CSO Interceptor that will connect to existing 5 km-long storage tunnel. Works include approximately 5.25 km of 1.27 m to 1.9 m-diameter near surface sewers in soil and rock; several connection and control structures; a 70 m-deep, 8.6 m-diameter work shaft; and a 70 m-deep, 573 m-long, 2.55 m-diameter tunnel in rock. Bidding scheduled for September, 2010. For project history since 1999, visit tunnelbuilder archive us/37. For background, visit www.narrabay.com/AboutUs/Facilities/MajorInitiatives/CSO.aspx. 37/10.

Request for Qualifications, deadline 27/09/2019,  for the Pawtucket Tunnel Project, first part of the Phase III of the NBC’s Combined Sewer Overflow (CSO). The project includes ancillary underground features (i.e. drop shafts, launch shaft, receiving shaft, tunnel pump station shaft, adit tunnels) to support the functionality of the tunnel to serve as a CSO storage facility. The Pawtucket Tunnel is a rock tunnel, 140-ft to 180-ft below the ground surface, located north of the BPWWTF from 804 School  Street to 660 Roosevelt Avenue in Pawtucket, RI, adjacent to the Blackstone River (see Figure 1). The tunnel is approximately 11,600 feet in length with a 30-foot inside diameter.

Visit http://www.narrabay.com/umbraco/surface/RFP/RFPFile?id=642&type=P.

Ref.n. 308.01C. 38/19.

The CB3A joint-venture composed of the US-based subsidiary of Bouygues Travaux Publics (65%) and local civil works contractor Barletta Heavy Division (35%) secured the €394 million Pawtucket Tunnel Project contract in the Rhode Island Delta, approximately 75 km south of Boston.  The project includes the design and construction of the 3.5 km Pawtucket tunnel and its ancillary structures, the excavation of three main shafts and 4 drop shafts.   The tunnel will be excavated along the Seekonk River using a TBM specially designed to accommodate the varied geology of the route. Its 9-m internal diameter will enable it to collect and store a significant proportion of the region's rainwater, wastewater and industrial water pending treatment by the water treatment plant. CB3A will be supported by engineering company Aecom to carry out the design. The contract is for a period of 48 months. Visit https://www.bouygues.com/wp-content/uploads/2021/01/pr_pawtucket_12.01.2021.pdf. 02/21.