Projects - TBM Tunneling - Bradshaw Construction Corporation

TUNNELING SPECIALISTS SINCE 1963

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The work we do is…
challenging. . .innovative. . .underground. . .
making us tunneling specialists.

COMPANY HISTORY
By combining superior craftsmanship developed throughout its early years, with innovative tunnel engineering and construction technology, Bradshaw successfully provides cost effective tunneling solutions to the utility and transportation industries.
Company

ABOUT US
Bradshaw Construction Corporation is a leading contractor in the tunneling industry. With over five decades of experience, we've earned respect as technological innovators through the construction of highly difficult tunneling projects.
VISION/MISSION/VALUES
We will safely and profitably build tunnels with our staff of knowledgeable, trustworthy, performance driven professionals.

TESTIMONIALS
"Bradshaw Construction is one of the best tunneling companies I have worked with. The personnel are first in class with safety, tunneling knowledge and problem resolution. Their equipment looks well maintained and clean."

SAFETY

Bradshaw Construction Corporation’s number one core value is the safety of its employees. Therefore, it is our primary goal to provide a safe and healthy working environment.

EQUIPMENT FLEET

Bradshaw Construction Corporation owns and operates an expansive fleet of heavy and underground construction equipment. The size of our fleet ensures every project is properly equipped and operating efficiently.

Projects

PROJECTS

Throughout our years of tunneling, Bradshaw Construction Corporation has worked on many complicated, sophisticated, and cutting edge projects. Each of those projects led us to find innovative solutions to unique problems. We invite you to take an in-depth look at projects where you will see the problems we encountered and how we solved them. Click to view all projects...

PROJECT MAP

MICROTUNNELING	TBM TUNNELING	HAND TUNNELING	PIPE REHAB	SHAFT WORK

Slurry Pilot Tube	Conventional Supports Pipe Jacking	Drill and Blast NATM/SEM Steel/Wood	Sekisui SPR Slip Lining	Concrete Caisson NATM/SEM Steel/Wood

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Microtunneling
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TBM TUNNELING

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Pipe Jacking

SORT BY PROJECT NUMBER | LOCATION | PROJECT TYPE

612 - Thorton Water Project
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
TBM Tunneling	Conventional	Johnstown, CO	City of Thorton	Rock	485' x 68" Ø
	SUMMARY: Bradshaw Construction installed two 68" OD rib-and-board tunnels as part of the Thornton Water Project. The two tunnels (250' and 235') were installed underneath rivers, the Cache La Poudre River in Windsor, CO, and the Little Thompson River in Johnstown, CO. The tunnels were installed behind an Akkerman 540 TBM out of secant pile shafts. Ground conditions consisted of claystone and sandstone. Complete Project Profile

593 - I-64 & Grinstead CSO Trenchless Sewer Installation Project
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
TBM Tunneling	Conventional	Louisville , Kentucky	MSD	Mixed Face	1252' x 102.50'' Ø
	SUMMARY: Bradshaw Construction Corporation completed constructing a CSO interceptor tunnel in Louisville, KY. The 1,252' rib-and-board tunnel was installed behind a 102.5” LOVAT ME-99RL Series 11700 TBM. Mining progressed through an s-curve on twin 2,300’ radius curves through 900’ of sticky clay and 350’ of weathered limestone, and 81” FRP was installed and backfilled. The project members... Complete Project Profile

572 - Sanitary Sewer Improvements; Goff Brook Overflow Closure
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
TBM Tunneling	Conventional	Wethersfield, CT	MDC	Rock	650' x 60" Ø
	SUMMARY: Bradshaw completed a 60” microtunneling/conventional TBM project in Wethersfield, Connecticut for 30” and 48” CCFRPM sanitary sewer installations. The first tunnel (650’) was installed by an Akkerman WM480 tunnel boring machine in stiff, wet clay. The 2nd (420’), 3rd (855’), 4th (152’), and 5th (450’) tunnels were completed behind a Herrenknecht AVN 1200 microtunnel boring... Complete Project Profile

540 - Improvements to Lower Gwynns Runs Interceptor, Phase II
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
TBM Tunneling	Conventional	Baltimore, MD	City of Baltimore	Rock	2543' x 72" Ø
	SUMMARY: Bradshaw completed 2,500' of tunnel from Franklin Street to Baltimore Street for a 36" gravity sanitary sewer. The 72" tunnel consisted of four segments, the longest of which was 1,200' beneath Amtrak and Norfolk Southern Railroads. Local geology consisted of very hard rock, with UCS tests of up to 37,000 psi, and was further complicated by the presence of periodic veins of highly decomposed... Complete Project Profile

530 - Manchester Creek Outfall, Phase II
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
TBM Tunneling	Pipe Jacking	Rockhill, SC	City of Rock Hill	Mixed Face	405' x 60" Ø
	SUMMARY: Bradshaw jacked two 60 inch diameter steel casings 15 feet below Dave Lyle Blvd. and Anderson Road using a conventional tunnel boring machine (TBM) in Rock Hill, SC. The 265 and 140 linear foot drives were part of a sanitary sewer outfall project. One 30-foot reach had to be hand mined through an unanticipated rock formation. Bradshaw finished the tunnels by installing 42 inch Ductile Iron Pipe... Complete Project Profile

519 - DCW M Street Diversion Sewers
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
TBM Tunneling	Conventional	Washington D.C.,	DCW	Soft Ground	2,327' x 72"-144"Ø
	SUMMARY: Bradshaw completed installation of 1,313 linear feet of 144 inch, and 1,014 liner feet of 72 inch rib and board tunnel for 110 inch and 48 inch fiberglass reinforced sewer. An Akkerman BS-120 digger shield and an Akkerman WM-60 TBM were used to excavate the tunnels. The work was in a busy urban area adjacent to the Anacostia River and a CSX Railroad. The tunnel was excavated through clay and... Complete Project Profile

516 - 11th Street Corridor CSO Diversion
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
TBM Tunneling	Pipe Jacking	Washington, DC	District of Columbia WASA	Soft Ground	386' x 66" Ø
	SUMMARY: Bradshaw direct jacked 386 linear feet of 54" reinforced concrete pipe via conventional TBM in two (2) drives, as part of the 11th Street Bridge project in Washington, DC. One drive was minded under I-295, while the other was under an SME wall for the new bridge. Ground conditions were primarily soft, wet silt, sand & clay; however, obstacles such as a large layer of river gravel and buried... Complete Project Profile

499 - College of William & Mary Historic Campus Utility Improvements, Ph 1, Water Distribution Lines
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
TBM Tunneling	Pipe Jacking	Williamsburg, VA	College of Wiliam and Mary	Soft Ground	1,200' x 60" Ø
	SUMMARY: The project for the College of William and Mary involved the construction of twin 600' by 60" diameter runs. 48" ID RCP was jacked behind a 60" diameter Akkerman TBM. Ground conditions encountered on the job included clay with some wet sand layers. The tunnels were used for steam and chilled water lines. Complete Project Profile

497 - International Paper Company Effluent Pipeline
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
TBM Tunneling	Conventional	Cantonment, FL	International Paper	Soft Ground	1150' x 75" Ø
	SUMMARY: Bradshaw Construction installed 1,150' of 75' O.D. Rib and Board Tunnel, as well as 48" DIP Carrier pipe to be utilized as an effluent pipeline. Bradshaw Construction worked through severe weather conditions which caused shaft movement and water intrusion. In addition, the work was completed within a residential zone. Bradshaw worked closely with the General Contractor and local residents... Complete Project Profile

489 - 30th Avenue North Storm Water Improvements
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
TBM Tunneling	Pipe Jacking	St. Petersburg, FL	City of St. Petersburg	Soft Ground	147' x 89" Ø
	SUMMARY: Bradshaw Construction installed 147 linear feet of 72 inch reinforced concrete pipe for a storm water system needing improvements. This was accomplished by direct jacking in a single pass under a CSX Transportation Railroad at a depth of 10 feet below the existing grade. Bradshaw worked closely with the CSX Railroad to install dewatering within the right of way, allowing for this type of... Complete Project Profile

488 - FDOT State Road 823
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
TBM Tunneling	Pipe Jacking	Hialeah, FL	FDOT	Soft Ground	183' x 102" Ø
	SUMMARY: Bradshaw Construction used one pass pipe jacking to install 183 linear feet of 84 inch reinforced concrete pipe under the Florida East Coast Railway using a 102 inch Lovat TBM in earth pressure balance mode. The ground conditions were silt, sand and limestone below the water table. The alignment and reception plans were modified, allowing for the completed tunnel to maintain minimal cover from... Complete Project Profile

479 - Appalachian State Steam Tunnel
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
TBM Tunneling	Pipe Jacking	Boone, NC	Appalachian State University	Rock	220' x 101.5" Ø
	SUMMARY: Bradshaw Construction Corporation successfully installed 220' of 84" RCP to act as a steam tunnel for the Appalachian State University. This was achieved by utilizing a 101.5" Lovat TBM capable of mining through hard rock conditions. The pipe was jacked directly behind the TBM. Soil conditions consisted of hard biotite gneiss rock. Complete Project Profile

478 - National Center Sanitary Sewer Project
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
TBM Tunneling	Conventional	Crystal City, VA	Arlington County	Mixed Face	1,890' x 68" Ø
	SUMMARY: The NCSS project highlights Bradshaw Construction's ability to redesign projects to increase efficiency, decrease costs, and streamline logistics. The NCSS project was initially designed as a pilot tube MTBM job. However, this would have involved the installation of 8 shafts in the middle of Jefferson Davis Highway - a major artery into and out of DC. We redesigned the project as a rib-and-board... Complete Project Profile

477 - Abingdon WTP Expansion
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
TBM Tunneling	Conventional	Abingdon, MD	Harford County Public Works	Soft Ground	372' x 114" Ø
	SUMMARY: Bradshaw Construction successfully completed a TBM Tunnel using an Akkerman Digger Shield and 114"Ø Rib & Board Supports under Interstate 95 for the Abingdon Waste Water Treatment Plant. With the key goal of minimizing potential settlement of I-95, the tunnel size was reduced from a plan diameter of 144" to 114". However, the size reduction increased the challenge of installing the Ductile Iron... Complete Project Profile

475 - Chesapeake Avenue Rehabilitation
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
TBM Tunneling	Pipe Jacking	Baltimore, MD	City of Baltimore	Soft Ground	120' x 51" Ø
	SUMMARY: Bradshaw Construction installed twin tunnels of 42" RCP storm sewer 60' each under a railroad in Baltimore, MD. There were several challenges and delays on the project. All of which stemmed from conflicting permits and access issues. When the methodology of using a TBM for pipe-jacking 42" RCP was finally approved by all parties it was under the allowance that all tunneling work would take... Complete Project Profile

468 - Flint River Transmission Main - Phase 2
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
TBM Tunneling	Conventional	Atlanta, GA	City of Atlanta	Mixed Face	1,040' x 72" Ø
	SUMMARY: The Flint River Transmission Main project was constructed using conventional TBM tunneling in the Hapeville neighborhood of south Atlanta, GA beneath Old Dixie Highway and an active Norfolk Southern railroad. The single 1,040' tunnel consisted of three separate curves. The first two were per plan, while the third was a 650' radius curve added during the tunnel excavation process to avoid a... Complete Project Profile

467 - Briar Creek Sewer Phase 1B Eastover Apartments Tunnel
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
TBM Tunneling	Conventional	Charlotte, NC	Charlotte-Mecklenburg Utility Dept.	Mixed Face	692' x 101.5"Ø
	SUMMARY: Bradshaw Construction Corp. has completed a 700 foot long by 101” diameter rib-and-board tunnel that was originally designed as a 25 to 40 deep cut-and-cover trench. The tunnel was advanced with a 101” diameter digger shield. 60” diameter Fiber Reinforced carrier pipe was installed, blocked and grouted in the tunnel. Complete Project Profile

457 - Battery Park Trunk Sewer Tunnel
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
TBM Tunneling	Conventional	Richmond, VA	City of Richmond	Soft Ground	3,400' x 144" Ø
	SUMMARY: Bradshaw responded to the City of Richmond, Virginia's emergency flooding caused by Tropical Storm Ernesto by installing 3,400’ of 110” fiberglass pipe in tunnel to permanently by-pass a collapsed combined sewer. Bradshaw used an Akkerman BS-120 digger shield and ribs and boards to construct the tunnel. Bradshaw pipe jacked 1,000’ of 48” RCP in one run and 260’ of 60” RCP in another... Complete Project Profile

441 - Sumter Avenue Storm Drain
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
TBM Tunneling	Conventional	Rock Hill, SC	City of Rock Hill	Soft Ground	191 x 84" Ø
	SUMMARY: Bradshaw installed a replacement storm drain under the Norfolk Southern Railroad. The tunnel traversed two mainline and one siding sets of tracks in Rock Hill, SC. The existing CMP storm drain was collapsing. The tunnel was accomplished by installing 84" diameter x 24" wide smooth back 4-flange liner plates behind a shielded Akkerman tunnel machine. The machine was launched into the base of an... Complete Project Profile

432 - Irwin Creek Relief Sewers Phase 2
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
TBM Tunneling	Conventional	Charlotte, NC	Charlotte-Mecklenburg	Mixed Face	4,700' x 60"-102" Ø
	SUMMARY: Bradshaw constructed 24 shafts that were 20 to 50 feet in depth of soldier pile and wood lagging. Rib and board was used above the water table and liner plate for below. 4700 linear feet of 60-102 inch tunnels for 36 inch and 54 inch ductile iron pipe. 900-1300 linear feet included curves by tunnel boring machine with liner plate under NSR Railroad. Drill & Blast. Complete Project Profile

430 - Deep River Outfall Sewer
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
TBM Tunneling	Conventional	High Point, NC	City of High Point	Rock	1,400' x 82"- 96" Ø
	SUMMARY: This project involved the utilization of two tunneling methods: hand mine drill & blast, and a TBM capable of mining through hard rock conditions. For the most part the 1,000' TBM run was self-supporting, but some of the weaker zones required rock bolts, roof channels, and even liner-plates for a short reach. Two drill and blast road crossings totaling 400' were completed on this job. Both drill... Complete Project Profile

418 - Elizabethtown Transmission Reinforcements - Phase II
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
TBM Tunneling	Conventional	South Bound Brook, NJ	Elizabethtown Water Co.	Rock	1,245' x 101" Ø
	SUMMARY: The Elizabethtown project highlights Bradshaw's ability to quickly adapt to major problems in an efficient, expedient manner. A special head was fabricated specifically for this project, based upon the unique conditions indicated by the boring logs. However, the head proved ineffective. Our fabrication department modified the head, and anticipated production rates returned to the expected amount... Complete Project Profile

400 - UVA Steam Tunnel and Storm Drain
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
TBM Tunneling	Pipe Jacking	Charlottesville, VA	UVA	Soft Ground & Mixed Face	676' x 60" OD, 480' x 101.5" OD
	SUMMARY: Steam distribution and storm drain improvements necessary at the University of Virginia were awarded to Bradshaw Construction. The work included jacking 480 feet of 84" RCP and 676 feet of 48" RCP as well as 3 cast-in-place structures & 3 precast manholes. Jet grouting was also used to stabilize a portion of the tunneling. Complete Project Profile

398 - US Capitol Coal Handling System
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
TBM Tunneling	Pipe Jacking	Washington, DC	The Architect of the Capitol	Soft Ground	320' x 114"Ø
	SUMMARY: Bradshaw jacked 320 feet of 96 inch reinforced concrete pipe for a coal conveyor tunnel under active CSX and Amtrak railroad tracks for Architect of the Capital in downtown Washington, DC. Bradshaw used an Akkerman Model BS96C digger shield (tunnel boring machine) to excavate the tunnel. Bradshaw also installed soldier pile and lagging supported pits for jacking and receiving shafts. The major... Complete Project Profile

377 - North Central Hillsborough Inter-tie - Phase 2
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
TBM Tunneling	Conventional	Tampa, FL	Tampa Bay Water Authority	Rock	300' x 99" Ø
	SUMMARY: Bradshaw Construction Corp. was subcontracted to Rockdale Pipeline Inc. (RPI) to tunnel under the Hillsborough river and install an 84-inch diameter water main in the tunnel. Two shafts were constructed on either side of the river by RPI using driven steel sheets. BCC mined the tunnel by jacking a 98-inch diameter steel casing behind a 101-inch diameter earth pressure balance (EPB) tunnel boring... Complete Project Profile

370 - South Central Hillborough Intertie Phase 1
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
TBM Tunneling	Conventional	Tampa, FL	Tampa Bay Water Authority	Soft Ground	1,888' x 99' - 101.5" Ø
	SUMMARY: Bradshaw was subcontracted by Westra Construction to mine a total of (8) tunnels under state roads and open cut (2) drives for the Tampa Bay Water Authority. 101.5 inch and 99 inch rib and board supports were installed to accommodate and install a 72 inch steel water main. The ground conditions consisted of soft ground and was below the water table. Complete Project Profile

354 - Pentagon Mall Terrace Utilities
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
TBM Tunneling	Pipe Jacking	Arlington, VA	Pentagon Renovation Office	Soft Ground	1234' x 101"Ø
	SUMMARY: Bradshaw Construction completed a project for the Pentagon Renovation Office that was needed for a storm sewer drain relocation. The scope of the project included 1,234 linear feet of 84 inch inner diameter of reinforced concrete pipe and two rib and lagging jacking shafts that were 30 feet and 36 feet in diameter and 57 vertical feet deep at man hole locations. The tunneling was performed by a... Complete Project Profile

308 - Fullerton Water Transmission Main Section I
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
TBM Tunneling	Conventional	Fullerton, MD	Baltimore County DPW	Soft Ground	1,707' x 112" Ø
	SUMMARY: Bradshaw used a Lovat tunnel boring machine (TBM) to construct 1,707 feet of 112 inch OD rib and board tunnel for an 84 inch welded steel watermain. Bradshaw also installed a 42' x 72' x 35' deep elliptical NATM mining shaft. The tunnel ground conditions were alluvial deposits of silt, sand and gravel. The challenges of the project were: 1) the limited stand up time of the alluvial soils in... Complete Project Profile

273 - Ruby Avenue Storm Sewer Extension
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
TBM Tunneling	Conventional	Kansas City, KS	City of Kansas City	Soft Ground	1,665' x 143"Ø
	SUMMARY: Bradshaw Construction installed 1,665' of 143” O.D. steel rib and board tunnel for a 96” RCP storm sewer using a modified Lovat TBM. The tunnel was part of a 6,630’ storm sewer project to alleviate flooding in the Argentine area of Kansas City, Kansas. Bradshaw also installed a solder pile and wood lagging mining shaft that attached to an existing box culvert storm drain. The primary... Complete Project Profile

255 - 96-Inch and 84-Inch Diameter Steel Water Main
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
TBM Tunneling	Conventional	Lanham, Maryland	WSSC	Soft Ground	900' x 132"Ø
	SUMMARY: Bradshaw installed 900’ of 132” OD rib and board tunnel in two drives with mining and receiving shafts for each. The tunnels were excavated through silts and sands using a TBM digger shield. The first tunnel was under Route 50 and the second was under Amtrak Railroad’s high speed rails between DC and Baltimore. 84” and 96” OD steel water main was installed in the tunnels... Complete Project Profile

1JV2 - Bushy Park Water Tunnel
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
TBM Tunneling	Conventional	Bushy Park, SC	Charleston CPW	Soft Ground	14,847 x 99"Ø
	SUMMARY: BTM Joint Venture, led by Bradshaw Construction, constructed 14,847’ of 99” raw water intake tunnel for the Commissioners of Public Works (CPW) of Charleston, SC. This tunnel extended CPW’s water source further up the Cooper River improving the quality and increasing the quantity of water. The entire tunnel was mined with a Lovat tunnel boring machine (TBM) through Cooper Marl... Complete Project Profile

1JV1 - East Bay/Calhoun Drainage Facilities Division I - Collection Tunnel System
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
TBM Tunneling	Conventional	Charleston, SC	City of Charleston	Soft Ground	2,880' x 120"Ø
	SUMMARY: BTM Joint Venture, led by Bradshaw Construction, constructed the first deep storm sewer tunnel for the City of Charleston to control flooding along Calhoun Street to Marion Square Park. The work consisted of 2,880’ of 120” rib & board TBM tunnel for a 96” ID cast in place storm sewer, two (2) caisson shafts, and two (2) drop stack intakes. The principal challenge on the project was first... Complete Project Profile