Projects - Shaft Work - 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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Hand Tunneling
Pipe Rehabilitation
Shaft Construction
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SHAFT CONSTRUCTION

Concrete Caisson

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SORT BY PROJECT NUMBER | LOCATION | PROJECT TYPE

576 - CSX Transportation Howard St. Tunnel Camden Street Drain Replacement
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Shaft Work		Baltimore, MD	CSX Transportation	Dense Alluvial Sand and Gravel	55' x 26' Diameter
	SUMMARY: Bradshaw completed this high profile project in downtown Baltimore, MD as part of a design-build team. An existing storm drain was located in the invert of the Howard Street CSX Rail Tunnel had been the cause of frequent flooding. This project replaced that 48” storm with a larger, deeper siphon drain which eliminated the flooding and allows CSX to increase the depth of the existing CSX tunnel... Complete Project Profile

571 - Division PR-B - CSO-021 Diversion Facilities - Drop Shaft
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Shaft Work	NATM/SEM	Washington, D.C.	DC Water & Sewer Authority	Rock	40 VF x 23' Ø
	SUMMARY: Bradshaw was contracted to install a drop shaft in rock on a small footprint bordered by the Kennedy Center for the Performing Arts, the Potomac River and the Theodore Roosevelt Bridge. The drop shaft contained two 108" sanitary sewer interceptors which will eventually be connected to DC Water's large diameter combined sewer overflow mitigation tunnels currently being constructed. The Kennedy... Complete Project Profile

552 - ODEC Wildcat Point Raw Water Supply
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Shaft Work	Steel/Wood	Peach Bottom, PA	ODEC	Rock	54' x 23'Ø
	SUMMARY: ODEC’s Wildcat Point Generation Facility (WPGF) in Cecil County, MD will use water from the Conowingo Reservoir in Lancaster County, PA. The Wildcat Point Raw Water Supply Project, consisting of a pump house, wet well shaft and pipelines to convey water from the Susquehanna River to WPGF. The wet well shaft was constructed by Bradshaw to serve as both tunnel access and as the permanent intake... Complete Project Profile

549 - 36" Southwest Transmission Main Relocation
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Shaft Work	Steel/Wood	Elkridge, MD	Howard County DPW	Mixed Face	32' Ø x 30' VF
	SUMMARY: Bradshaw Construction microtunneled 380 linear feet of 60 inch steel casing under I-195 in Elkridge, MD. The subsurface conditions consisted of silt, sand, and gravel below the groundwater table. Bradshaw also installed two 32' OD liner plate shafts to depths of 24 VF & 32 VF for the launch & receiving shafts. The 36" PCCP carrier pipe was installed with the assistance of the general contractor... Complete Project Profile

544 - CIAC Water Project Segment 2, Phase 1: Rivercrossing
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Shaft Work	Steel/Wood	Tampa, FL	City of Tampa	Mixed Face	WSM 23' ID x 45' VF & Drilled 10' OD x 40' VF
	SUMMARY: This microtunnel project was part of the Design/Build Capital Improvements Program for the City of Tampa. For future city growth, Bradshaw microtunneled a 60" x 482' steel casing under the Hillsborough River for a new 36" DIP water main. Two shafts were constructed: a 23' ID x 45' deep launch shaft at Julian B. Lane River Park and a 10' OD x 40' deep drilled receiving shaft at the Straz... Complete Project Profile

542 - AGY-Purple Line Plymouth Tunnel Test Shaft
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Shaft Work	Steel/Wood	Silver Spring, MD	MTA	Soft Ground	12'Ø x 33VF
	SUMMARY: Bradshaw installed a 12 foot diameter rib and board shaft for geotechnical exploration and observation as part of the Maryland Transportation Authority's Purple Line project. The shaft was installed to a depth of 33 feet in sand, silt & decomposed rock, and then backfilled with flowable fill after a four day observation period. Bradshaw's work was completed in 20 working days (including... Complete Project Profile

540 - Improvements to Lower Gwynns Runs Interceptor, Phase II
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Shaft Work	NATM/SEM	Baltimore, MD	City of Baltimore DPW	Rock	4EA @ 24'x31VF, 42VF, 57VF &18VF, 16'x49VF, & 32'x27VF
	SUMMARY: Bradshaw constructed six shafts in downtown Baltimore City for 2,553' of 36” gravity sewer installed in rock by TBM (gneiss up to 37,000 psi). In addition to providing tunnel access, the shafts were used to install new sewer manholes and connections to the existing system. The 16' & 24' diameter shafts (depths ranged from 18' to 57') were supported by steel ribs & wood lagging in the soft... Complete Project Profile

532 - South Platte Interceptor
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Shaft Work	Steel/Wood	Brighton, CO	MWRD	Mixed Face	204' x 24.5 - 25.5VF
	SUMMARY: Bradshaw Construction was contracted to mine five microtunnel crossings on Metro PAR 1088. Crossings at 168th & 160th Avenues were jacked with 96 inch steel casing. Crossings for the South Platte River & E-470 are completed and utilized 78 inch steel casing. The ground conditions consist of sand, gravel, coarse alluvium, and cobbles below the groundwater table. The scope also includes several... Complete Project Profile

529 - McMillian Stormwater Storage
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Shaft Work	Steel/Wood	Washington D.C.,	DCW	Soft Ground	57'x12-46VF
	SUMMARY: Bradshaw Construction completed two shafts and a hand mine liner plate tunnel as part of a storm water overflow project in northwest Washington DC. As a result of flooding in the area, DC Water decided to convert a more than 100 year old sand filtration chamber into a storm water overflow basin. Bradshaw was subcontracted to install 28 vertical feet of 25 foot diameter shaft while working from... Complete Project Profile

521 - Crabtree Basin Waste Water Conveyance Phase 1
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Shaft Work	Steel/Wood	Raleigh, NC	City of Raleigh	Mixed Face	66'x24-40 VF
	SUMMARY: Phase 1 of the Crabtree Basin Wastewater improvements project consisted of 21,000 feet of 30" to 72" diameter gravity sewer pipe. Three segments were designed for trenchless construction by microtunneling. These included two road crossings and one crossing under existing 60" RCP pipeline connected to an active pump station. Bradshaw microtunneled all three crossings in rock and mixed face soil... Complete Project Profile

517 - I-83 Emergency Shaft
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Shaft Work	Steel/Wood	Baltimore, MD	Baltimore City DOT	Soft Ground	24' x 24VF
	SUMMARY: Bradshaw Construction made emergency point utility repairs for 15 inch and 18 inch reinforced concrete in the median of I-83 in Baltimore, MD. A 24 foot, outer diameter, shaft which encompassed an active manhole was excavated and shored with steel liner plates to a depth of 24 feet. Bradshaw's scope included excavating and installing the shaft supports, replacing the broken pipes and... Complete Project Profile

505 - Piney Branch Sewer Interceptor Upgrade - Phase 1
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Shaft Work	Steel/Wood	Waldorf, MD	Charles County	Soft Ground	12'-15' x 15'-30'
	SUMMARY: As part of a 1,600 linear feet microtunnel sewer project, Bradshaw installed all the 5 drive shafts. Subsurface conditions included silt, clay, and sand with the tunnels well below the ground water table. Bradshaw used interlocking steel sheeting to install the water tight shafts ranging in depth from 18 to 23 feet. The primary challenges of this project were the limited access along lengthy... Complete Project Profile

504 - Castleton Relief Sewer Project-Phase 1
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Shaft Work	Steel/Wood	Indianapolis, IN	Citizens Energy Group	Mixed Face	16' x 20' Ø
	SUMMARY: Bradshaw Construction installed 2,740 linear feet of 42 inch reinforced concrete pipe for a relief sanitary sewer by microtunneling through sand with cobbles and boulders below the groundwater table at an average depth of 20 feet. The microtunneling was accomplished in four drives, the longest of which was 810 feet. Six access shafts were constructed using steel ribs and liner plates (16 feet... Complete Project Profile

480 - Belmont North Relief Interceptor - Section 1
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Shaft Work	Steel/Wood	Indianapolis, IN	City of Indianapolis	Mixed Face	26' to 43' Ø
	SUMMARY: Bradshaw Construction installed 5,200' of 72" reinforced concrete pipe for a sanitary sewer relief interceptor. 4,000' of pipe was installed by microtunneling through sand with cobbles and boulders and glacial till below the groundwater table at an average depth of 30'. The microtunneling was accomplished in six segments, the longest being 1,150' long using three intermediate jacking stations... Complete Project Profile

478 - National Center Sanitary Sewer Project
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Shaft Work	Steel/Wood	Crystal City, VA	Arlington County	Mixed Face	26'Ø x 30VF
	SUMMARY: The primary jacking pit on the NCSS project was a 30' deep, 26' diameter shaft supported by steel ribs and wood lagging. The shaft was installed in primarily sandy, dry conditions with interspersed layers of hard clay. One of the main challenges involved in the shaft installation was the presence of a manhole intersecting the shaft. The manhole remained from a previous drilled shaft... Complete Project Profile

457 - Battery Park Trunk Sewer Tunnel
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Shaft Work	NATM/SEM	Richmond, VA	City of Richmond	Soft Ground	30' Ø NATM + 30' Ø R&B + 20'x50' SP&L
	SUMMARY: To resolve CSO flooding from a collapsed sewer for the City of Richmond, Bradshaw installed 4 tunnels from various drive and recovery shafts. These included the use of the New Austrian Tunnel Method (NATM – Sprayed reinforce shotcrete), steel sheet piling, steel rib and wood lagging, and trench box shafts. The all varied in depth up to 60’ deep. The NATM shafts were 30' ID. The structures... Complete Project Profile

434 - Upper Jones Falls Interceptor Sewer - Phase 2
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Shaft Work	NATM/SEM	Baltimore, MD	Baltimore City DPW	Mixed Face	40' x 70' x 35VF
	SUMMARY: As part of a 6,000 foot microtunnel sewer project, Bradshaw installed a 40’ wide x 70' long x 35’ deep elliptical shaft over an existing 42” sewer and manhole. This shaft was large enough to allow a gravity by-pass of the existing 42” sewer so a unique cross-over structure could be constructed to tie this existing sewer into the new microtunneled 48” sewer. The shaft was excavated by... Complete Project Profile

432 - Irwin Creek Relief Sewers Phase 2
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Shaft Work	Steel/Wood	Charlotte, NC	Charlotte-Mecklenburg	Mixed Face	50' x 15' x 26VF & 12'-26' x 24VF-42VF
	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

419 - Nancy Creek Pump Station Shaft
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Shaft Work	NATM/SEM	Atlanta, GA	City of Atlanta	Mixed Face	72' Ø x 150VF
	SUMMARY: The City of Atlanta awarded a design-build contract to Western Summit Constructors, Inc. (WSCI) to construct a 100 mgd, 160' deep pump station at the R.M. Clayton WWTP. WSCI hired Bradshaw/Frontier Kemper JV (BFK) to design, excavate and support the shaft for the pump station. Jenny Engineering designed the shaft for BFK. The shaft was 72' in diameter by 150 feet deep after site excavation. The... Complete Project Profile

412 - Hillen/Ashburton Plant Bypass Pipeline
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Shaft Work	NATM/SEM	Baltimore, MD	Baltimore City DPW	Soft Ground	48'Ø x 40' Deep
	SUMMARY: Bradshaw constructed a 48 foot ID x 40 feet deep shaft over an existing 96” sanitary sewer. Bradshaw used the New Austrian Tunneling Method (NATM) to install and support the shaft. The ground conditions were silt, sand (micaceous residual) soils with gneiss boulders. A cast in place concrete junction chamber was built in the shaft to tie in the existing sewer with a new 66” PCCP sewer... Complete Project Profile

398 - US Capitol Coal Handling System
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Shaft Work	Steel/Wood	Washington, DC	The Architect of the Capitol	Soft Ground	31' x 32' x 30VF & 27' x 29' x 25VF
	SUMMARY: Bradshaw installed soldier pile and wood lagging supported pits for jacking drive and receiving shafts necessary to jack 320’ x 96” RCP coal conveyor tunnel. The jacking drive shaft was 31’ x 32’ x 30’ deep and the receiving shaft was 27’ x 29’ x 25’ deep. The major challenge was installing both shafts in close proximity to the existing coal transfer plant facilities and the... Complete Project Profile

388 - Pentagon Metro Entrance Facility
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Shaft Work	NATM/SEM	Washington, DC	Pentagon Renovation Office	Soft Ground	34' Ø X 50VF
	SUMMARY: The Metro Entrance Facility was a security-driven project designed to eliminate the direct entry to the Pentagon from the Metro tunnel and provide a secure screening facility for Pentagon visitors. As part of the project, a 50' deep elevator was constructed between the existing underground station and connecting to the existing escalator passage for handicap access. Bradshaw was selected to... Complete Project Profile

324 - Cohas Brook Interceptor - Phase 1
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Shaft Work	Concrete Caisson	Manchester, NH	City of Manchester	Mixed Face	10' - 14' x 40VF - 60'VF
	SUMMARY: As part of a microtunneling project Bradshaw installed two caissons: a 14’ ID x 40' deep jacking shaft and a 10' ID x 60' deep receiving shaft. They were constructed using precast concrete segments and fitted with steel cutting shoes. They were sunk under their own weight, by excavating the soil with a crane & clam bucket. The lower portions were excavated subaqueous and the bottom slabs were... Complete Project Profile

308 - Fullerton Water Transmission Main Section I
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Shaft Work	NATM/SEM	Fullerton, MD	Baltimore County DPW	Soft Ground	73' x 42' x 35VF
	SUMMARY: Bradshaw constructed an elliptical shaped shaft with the dimensions of 73 feet x 42 feet x 35 feet deep using the New Austrian Tunnel Method (NATM). The ground conditions were silt, sand and gravel. The shaft was used to install 1,700’ of TBM tunnel for an 84 inch steel water main and to construct a triple 84 inch butterfly valve vault. The principal challenge of the project was to install... Complete Project Profile

1JV1 - East Bay/Calhoun Drainage Facilities Division I - Collection Tunnel System
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Shaft Work	Concrete Caisson	Charleston, SC	City of Charleston	Soft Ground	16' - 30 'Ø x 130VF - 150VF
	SUMMARY: BTM Joint Venture, led by Bradshaw Construction, managed the construction of two (2) cast-in-place caisson shafts constructed in downtown Charleston, SC. The project was the first phase of flood control instituted by the City. The first caisson was 30’ ID x 150’ deep at Concord St and served as a tunnel mining shaft and future pump station. The second caisson was 16’ ID x 130’ deep in... Complete Project Profile