Projects - 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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ALL PROJECTS

SORT BY PROJECT NUMBER | LOCATION | PROJECT TYPE

623 - SWTP Discharge Water Line
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	New Braunfels, TX	New Braunfels Utilities	Mixed Face	412' x 60" Ø
	SUMMARY: Bradshaw Construction Corporation installed a 412' long, 48" RCP tunnel underneath the Guadelupe River in New Braunfels, Texas. The unique feature of this tunnel was that it was installed on a 620' radius vertical curve, with the tunnel launched on a -19.63% slope and emerging on the far side of the river at a 17.10% slope. The tunnel passed predominantly through claystone until a transition into... Complete Project Profile

621 - C-51 Reservoir
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Loxahatchee, FL		Silty Sand, Limestone	1912' x 96'' Ø FRP
	SUMMARY: Bradshaw Construction installed twin drives of 96" FRP direct jack via MTBM totaling 1912 LF. The project was located in Loxahatchee, FL and the tunnels we installed through geotechnical conditions ranging from silty sand with shell fragments to limestone. The twin tunnels were located near an active quarry, under MSHA rules and regulations. Complete Project Profile

619 - OWSP Quarry Intake
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Hand Tunneling	Drill and Blast	Winchester, VA	Frederick Water	Rock	312 x 120
	SUMMARY: Water supply project in abandoned quarry. 312' of 10' horseshoe tunnel in limestone rock for underground intake. Drill & blast exacavtion using rock bolt supports suplemented as needed with welded wire fabric and shotcrete. Final lining was 4" of synthetic fiber reinforced shotcrete. Complete Project Profile

615 - Harbor Island FM
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Tampa, FL	City of Tampa	Soft Ground	1220' x 73.5'' Ø
	SUMMARY: Bradshaw Construction installed one launch shaft (34'x34'x27VF) and one recovery shaft (25'x25'x21VF) to facilitate the installation of twin microtunnel drives totaling 1,220 LF utilizing 73.5" steel casing for 48" and 54" Ductile Iron FM in Tampa, FL. The tunnels were installed below the water table in subsurface conditions that ranged from limestone to sand and silty clay. The twin tunnels... Complete Project Profile

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

611 - Shady Grove Sewer Extension
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Derwood, MD	EYA	Rock	182’ x 60” Ø (48” RCP)
	SUMMARY: Bradshaw Construction was contracted to install a 182’ x 48” RCP tunnel for a sewer extension project in Derwood, MD, after the original subcontractor was unable to install the tunnel with a 36" SBU. The 60” OD tunnel was installed underneath a road and highly sensitive 36” and 48” PCCP water transmission lines with minimal clearances. The initial SBU attempt made it 70’ in, requiring... Complete Project Profile

610 - CSO 13 Consolidation Sewer - Phase II
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Indianapolis, IN	CEG	Soft Ground	475' x 62.9" Ø
	SUMMARY: Bradshaw Construction installed two tunnels in Indianapolis, IN as part of a consolidation sewer project. The 60” FRP (62.9” OD) were direct-jacked behind an up-skinned Herrenknect AVN 1200 MTBM. The tunnels were installed underneath a roadway through loose sand, silt and cobbles. Bradshaw was brought onto the project after initial attempts at hand-mining were unsuccessful given the raveling... Complete Project Profile

609 - Upper North Oconee Phase 2B
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Athens, GA	Athens-Clarke County	Rock	60/72" x 1,300'
	SUMMARY: Bradshaw Construction mined 1300' total of 60" steel casing over three different drives with the longest drive being 900'. Within the 60" steel casing, Bradshaw also installed 36" ductile iron pipe for a sewer. Many methods were used to complete this project and handle the varying geology. The AVN 1200 MTBM machine was used to mine under a local railroad. Hand-mining was used to get though... Complete Project Profile

605 - Jones Falls Sewershed
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Hand Tunneling	Steel/Wood	Baltimore, MD	City of Baltimore DPW	Mixed Face	(2) 23' x 48" & 72" Ø
	SUMMARY: Bradshaw Construction Corporation installed two 23' parallel liner plate tunnels (48" & 72") underneath Falls Road for a sanitary sewer installation. 18" and 54" ductile iron pipe was installed and backfilled in the tunnels after completion. The tunnels passed directly underneath twin 66" x 84" storm culverts, installed through clay with boulders/shot rock overlaying partially weathered rock in... Complete Project Profile

604 - Tampa Waterfront District
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Tampa, FL	Strategic Property Partners	Soft Ground	172' x 30" Ø
	SUMMARY: Bradshaw Construction Corporation installed one steel casing tunnel totaling 174' as part of a water main line in Tampa, FL. The 30" OD tunnel was driven behind an AVN 600 XC MTBM. Bradshaw was able to mine at a rate of 100-150 mm/min through soft ground soils such as sand and clay. After the steel casing tunnel was successfully mined, Bradshaw then installed a 12" ductile iron pipe into place... Complete Project Profile

603 - Oklahoma City Sanitary Sewer Relief Interceptor SC-0950
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Oklahoma City, OK	Oklahoma City Water Utilities Trust	Soft Ground	915’ x 90” Ø
	SUMMARY: Bradshaw Construction installed three steel casing tunnels totaling 915’ as part of a sanitary sewer relief interceptor in Oklahoma City, OK. The 90” OD tunnels were installed behind a RASA DH-1900 MTBM, with 40’ joints utilized. Bradshaw coordinated with the General Contractor to set the large casings with two excavators, installing one joint per day to allow for welders to perform the... Complete Project Profile

602 - Virginia Beach Boulevard FM - Phase VI
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Virginia Beach, VA	HRSD	Soft Ground	1,360' x 60" Ø
	SUMMARY: Bradshaw Construction installed three 60” steel casing tunnels totaling 1,360’ LF in Virginia Beach, VA as part of a new force main installation. The tunnels were installed through congested commercial areas underneath roads and rivers, with multiple utility conflicts. The ground conditions consisted of sand, silt and organic materials, underneath the water table. The longest drive of 740’... Complete Project Profile

600 - Power Industry Raw Water Intake
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Southwest Pennsylvania, PA	Not Available	Mixed Face	320' x 60'' Ø
	SUMMARY: Bradshaw Construction installed a 320’ tunnel into the Monongahela River in southwest PA. The 60” welded steel casing tunnel was installed through 25 ksi limestone which transitioned into the river bed consisting of sand and gravel. The tunnel was installed out of 60’ deep secant pile shaft, with the tunnel 20’ below the typical river elevation. Once driven to station, the MTBM was... Complete Project Profile

597 - Liberty University Vines Center Arena
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Lynchburg, VA	CMA Associates, Inc	Mixed Face	250’ x 75.4” Ø
	SUMMARY: Bradshaw Construction installed a 250’ tunnel underneath the campus of Liberty University in Lynchburg, VA. The direct-jacked 72” fiberglass tunnel was installed through a congested area of campus, underneath utilities, first through a pinnacle of hard and abrasive schist, then transitioning into clay. Challenges included tunneling through the mixed face/mixed reach conditions and maintaining... Complete Project Profile

596 - Rte 264 - Interchange Improvements 64 WB Ramp to 264 EB
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Norfolk, VA	VDOT	Soft Ground	381’ x 73.5” Ø
	SUMMARY: Bradshaw Construction installed two 60” RCP crossings underneath I-264 and the LRT tracks for VDOT in Norfolk, VA. The tunnel crossings (107’ & 274’) were required for tidal flow management of the Nosehs Creek underneath the newly constructed highway overpass. The tunnels were excavated through sand and clay below the water table, with extensive obstructions encountered on the first... Complete Project Profile

594 - Pressure Reducing Station Realabilty Upgrades
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Virginia Beach, VA	HRSD	Soft Ground	182' x 60" Ø
	SUMMARY: Bradshaw Construction installed 182’ x 60” steel casing underneath Providence Road for the Hampton Roads Sewer Sanitation District in Virginia Beach, VA. The tunnel crossing was required for the installation of a 42” DIP sanitary sewer. The tunnel was excavated through sand and clay below the water table. Challenges included tunneling underneath Providence Road without causing settlement... Complete Project Profile

593 - I-64 & Grinstead CSO Trenchless Sewer Installation Project
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
TBM Tunneling	Slurry	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

592 - Virginia General Assembly Building Pedestrian Tunnel
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Hand Tunneling	NATM/SEM	Richmond, VA	VGS	Soft Ground
	SUMMARY: Construction for the new Virginia General Assembly Building in Richmond, included a pedestrian tunnel under 9th Street to connect a new parking garage. Bradshaw proposed a SEM tunnel for the passage that was accepted by the Owner. The tunnel excavation was 21.08' wide x 15.10 high and excavated by header & bench under 12' of cover. Groundwater was about 22' below the pavement. 4 dewatering wells... Complete Project Profile

590 - Noman M. Cole, Jr. Pollution Control Plant Disinfection Facilities Replacement Project
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Pipe Rehab	Slip Lining	Lorton, VA		N/A	11' x 48" x 76" Ø
	SUMMARY: Bradshaw Construction performed a rehabilitation project on a damaged RCP outfall in Lorton, VA. The Noman M. Cole Pollution Control Plant contains a 48" x 76" elliptical RCP line, wherein a joint sustained damage in the crown. Bradshaw was able to enter the outfall downstream and install 46" x 68" liner plates to reinforce the RCP, then backfilled the annulus between the liner plate and RCP. Complete Project Profile

584 - Clairborne Run Sewer
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Fredericksburg, VA	The Stafford County DPU	Soft Ground	190' x 60" Ø
	SUMMARY: Bradshaw completed microtunneling 190’ of 60” steel casing under CSX tracks in Fredericksburg, VA for a 42” DIP gravity sewer as part of an Infrastruction Program just north of abandoned SR-218 along Claiborne Run. The Stafford County DPU contracted Timmons Group and W.C. Spratt, Inc. to construct the project, with Bradshaw being selected as microtunneling subcontractor. The 60” MTBM... Complete Project Profile

583 - Western Area Trunk Sewer
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Richmond, VA	Henrico County	Mixed Face/Mixed Reach	532' x 60" Ø
	SUMMARY: Bradshaw has completed microtunneling 532’ of 60” steel casing under I-64 , a six-lane divided highway northwest of Richmond, VA for a 30” DIP gravity sewer. Henrico County (Owner) contracted AECOM (Engineer) and Gaston Brothers Utilities, LLC (General Contractor) to construct the project, with Bradshaw being selected as microtunneling subcontractor. The 60” MTBM used was a model AVN-1200... Complete Project Profile

580 - South County Re-Pump Station Water TM to 19th Ave. CIP 31969
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Ruskin, FL	Hillsborough County	Soft Ground	1055' x 48" Ø
	SUMMARY: As part of Capital Improvement Project for Hillsborough County necessary to accommodate an expanding population, Bradshaw microtunneled in a single drive 1,055 linear feet of 48” steel casing for 16” DIP carrier pipe under I-75. Bradshaw also installed a 16’x30’ launch shaft and a 12’x16’ receiving shaft. The depth of the shafts were approx. 25-feet deep and below the water table... Complete Project Profile

579 - Sanitary Sewer 24" S1 @ I-277 Sewer @ I-277 to Whisnant
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Charlotte, NC	I-77 Mobility Partners	Mixed Face	1505' x 60" Ø
	SUMMARY: Bradshaw completed tunneling on a project for improvements on the Express Lanes that covers nearly 26 miles of the I-77 corridor just north of Charlotte, including the conversion of existing high occupancy vehicles to the Express Lanes and the construction of new express lanes and two major interchanges. The tunneling work consisted of four microtunnel drives totaling 1,505 LF of 60" steel casing... Complete Project Profile

578 - Globeville Landing Outfall Phase 3
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Denver , CO	City & County of Denver	Soft Ground	1030' x 100.75" Ø
	SUMMARY: Bradshaw pipe jacked twin one-pass 96-inch RPMP tunnels (515’ each) using slurry microtunneling for the City of Denver. The tunnels passed under Union Pacific Railroad and RTD commuter rail lines. The new storm water transmission lines are essential to improving flood control of the Platte to Park Hill Storm-Water Systems. The soil conditions were in dense sand, silt, and clay. The main... Complete Project Profile

576 - CSX Transportation Howard St. Tunnel, Camden St. Drain Replacement
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Baltimore, MD	CSX Transportation	Soft Ground	122' x 74" Ø
	SUMMARY: Bradshaw completed this high profile project in downtown Baltimore, MD as part of a design-build team. An existing storm drain 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 tunnel to... Complete Project Profile

576 - CSX Transportation Howard St. Tunnel, Camden St. Drain Replacement
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Hand Tunneling	Steel/Wood	Baltimore , MD	CSX Transportation	Soft Ground	68' x 48" & 32' x 66" Ø
	SUMMARY: Bradshaw completed this high profile project in downtown Baltimore, MD as part of a design-build team. An existing storm drain located in the invert of the Howard Street CSX Rail Tunnel had been the cause of frequent flooding. This project replaced that 48” storm drain with a larger, deeper siphon drain which eliminated the flooding and allows CSX to increase the depth of the existing tunnel... Complete Project Profile

576 - CSX Transportation Howard St. Tunnel Camden Street Drain Replacement
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Shaft Work	Steel/Wood	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

574 - I-285 30" Watermain Replacement at Panthersville Rd.
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Panthersville, GA	GADOT	Mixed Face	245' x 60" Ø
	SUMMARY: Bradshaw recently completed construction on a microtunneling project in Decatur, GA, installing 245’ of 60” steel casing under I-285 for a 30” DIP water transmission main. The tunnel was installed behind a Herrenknecht AVN-1200 microtunnel boring machine. 32’ and 16’ diameter liner plate launch and recovery shafts were installed, with sample borings showing loose sands and the water... Complete Project Profile

572 - Sanitary Sewer Improvements; Goff Brook Overflow Closure
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Wethersfield, CT	MDC	Rock	2388' 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

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

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

570 - U.S. 29 Water Transmission Main
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Columbia, MD	Howard County	Mixed Face	752' x 60" Ø
	SUMMARY: Bradshaw recently completed construction for a portion of the US 29 Water Transmission Main project, installing 752' of 60” steel casing under MD Route 108 in Columbia, MD for a 36” water transmission main. Bradshaw recently completed a similar 470’ drive as part of the previous phase to this project. Tunnel depths for the single drive ranged from 6’ to 30’ below the surface, with the... Complete Project Profile

569 - Ellwood Water Treatment Plant
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Wampum, PA	PAW	Mixed Face	1001' x 75" Ø & 530' x 60" Ø
	SUMMARY: Bradshaw completed two 75” OD microtunnels with a length of 480’ and 523’ and one 60” OD microtunnel with a length of 530’. Two of the tunnels were microtunneled from a 150’ deep shaft and passed under Norfolk Southern railroad right of ways while the third tunnel passed under the CSX railway right of way. The jacked tunnels used Permalok steel casing, except within the railroad right... Complete Project Profile

567 - Route 1 North Sewer Improvements
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Stafford, VA	Stafford County	Mixed Face	790' x 43"Ø
	SUMMARY: Bradshaw recently completed construction of 790 linear feet of 43 inch steel casing under US Route 1 for a 30 inch ductile iron gravity sewer. The project was divided into two tunnels (460 linear feet and 330 linear feet) sharing a common 32 foot diameter liner plate launch shaft installed by Bradshaw. The 43 inch tunnel was installed using an AVN-800 MTBM model developed by Herrenknecht. Tunnel... Complete Project Profile

566 - N. St. Elmo Drainage System Upgrade
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Hand Tunneling	Steel/Wood	Chattanooga, TN		Mixed Face	332' x 84" & 250' x 75"
	SUMMARY: Bradshaw constructed three tunnels as part of a stormwater sewer improvement project for the City of Chattanooga. Bradshaw originally intended to construct the 84" liner plate tunnels and 72" direct-jack FRP tunnel with conventional tunnel boring machines. However, the local foundry sand fill material contained numerous obstructions, with slag, bricks, reinforced concrete, glass and various trash... Complete Project Profile

565 - Oregon Avenue NW Sewer Rehabilitation
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Washington , D.C.	DC Water	Rock	2,150' x 60" & 632' x 48" Ø
	SUMMARY: Bradshaw has completed construction of a 4,300' long 24" sewer interceptor project for DC Water. The project included 2,600' of tunnels installed in (3) drives at depths of up to 90'. The 60" tunnels, were accessed from (6) shafts up to 48' deep. Subsurface conditions consisted of Tonalite rock ranging from slightly weathered to highly decomposed. 2,150' of 60" steel casing were installed in... Complete Project Profile

564 - Arkendale-Powell's Creek Third Track Project
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Pipe Rehab	Slip Lining	Quantico, VA	CSX Transportation, Inc.	N/A	50' x 60"Ø
	SUMMARY: Bradshaw completed an emergency slipline repair project for KC Constructors (Kiewit-Clark JV). During the construction of a new track for CSX railroad, supportive steel sheeting was driven through an existing 60 inch RCP storm drain, requiring corrective measures. KC Constructors subcontracted Bradshaw to diagnose and repair the damage. After an initial exploration, 50 linear feet of 54 inch FRP... Complete Project Profile

563 - Coakley Terrace II Transmission Water Main
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Hyattsville, MD	The Washington Suburban Sanitarty Commission	Soft Ground	830' x 43"Ø
	SUMMARY: Bradshaw installed 830 ft of 43 inch steel casing in a single drive under the BaltimoreWashington Parkway (I-295) for a 16-inch DIP water transmission main. The Washington Suburban Sanitary Commission (Owner) contracted KCI Technologies (Engineer) and Sagres Construction (General Contractor) to construct the project, with Bradshaw being selected as the microtunnel subcontractor. Tunnel depths... Complete Project Profile

562 - U.S. Route 29 Water Transmission Main
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Columbia, MD	Howard County DPW	Mixed Face	469' x 60"Ø
	SUMMARY: Bradshaw recently completed the installation of 470 linear feet of 60 inch steel casing under U.S. Route 29 for a 36 inch water transmission main. Tunnel depths ranged from 6 to 30 feet below the surface, with the alignment passing beneath the water table through dense silty sands and partially weathered rock. Bradshaw constructed a 32 foot diameter, 27 foot deep steel rib-and-liner plate launch... Complete Project Profile

561 - Briar Creek Relief Sewer, Phase III
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Charlotte, NC	Charlotte-Mecklenburg Utility Dept.	Mixed Face	378' x 60"Ø
	SUMMARY: Bradshaw completed this project for installation of 60 inch steel casing for a gravity sewer under boulevards and railroads. Three tunnels totaling 378 linear feet were installed using an Herrenknecht AVN1200 MTBM. The subsurface conditions varied from soft ground of clay and silt, partially weathered rock, and granite. Bradshaw also installed liner plate launch shafts for the tunnels... Complete Project Profile

560 - Terris Tatum Tennessee River Intake Facilities
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Triana, AL	Madison Utilities	Mixed Face	388' x 60"Ø
	SUMMARY: Bradshaw construction completed a microtunneling installation of lined 60” steel casing with three (3) 6” HDPE airlines installed within the casing. The casing served as a water intake on the Tennessee River in Madison, Alabama. The MTBM was recovered underwater by the use of divers and was a true test in itself. The major challenge on the project was fighting the buoyant forces of the... Complete Project Profile

559 - Glenmont Rock Handmine
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Hand Tunneling	Steel/Wood	Wheaton, MD	Winchester Homes	Rock	22' x 36" x 36"
	SUMMARY: Our client had concerns about breaking rock with a hoe ram so close to an existing water main. Instead, Bradshaw installed two tunnels hand mined through rock under the existing water main. The first one went so well that a second tunnel was added after the first one was completed. The rock was removed via drilling and splitting with pneumatic breakers, and then a steel sleeve was installed as... Complete Project Profile

558 - Condenser Water Piping Renewal, Building 7 (JHU / APL)
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Hand Tunneling	Steel/Wood	Laurel, MD	JHU	Mixed Face	29' x 36" x 36"Ø
	SUMMARY: Bradshaw installed two 36 inch x 36 inch wood box tunnels, 10 linear feet and 19 linear feet long respectively, as part of a project aimed at upgrading the infrastructure at the Applied Physics Laboratory (APL). The woodbox tunnels were installed directly under two existing active corridors. The hand mined wood box technique was selected over auger boring due to the smaller work area, and the... Complete Project Profile

557 - I-89 Culvert Improvements
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Hand Tunneling	NATM/SEM	Georgia, VT	VTRANS	Soft Ground	236' x 20.5' W x 13.5' H Ø
	SUMMARY: Bradshaw completed construction of two storm drain tunnels under Interstate 89 to replace the failing 72 inch CMP stream culverts. The total excavation was 20.5' wide x 13.5' high horseshoe tunnel. The lengths were 136 and 100 feet. The finished inner diameter of the precast culverts were 15' wide x 8.5' high. The tunnels were constructed using the sequential excavation method (SEM) consisting... Complete Project Profile

556 - South Trunk Sewer, Section G Forcemain Replacement
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Norfolk, VA	HRSD	Soft Ground	136' x 50.5"Ø
	SUMMARY: Bradshaw installed 136 linear feet of 50.5 inch steel casing to accommodate a 30 inch ductile iron sewer line under East Brambleton Avenue at the intersection with St. Paul Boulevard in downtown Norfolk,VA. Soil conditions consisted of sand under the water table. Microtunneling was required due to the need to keep the busy intersection open, and because the saturated sand would have been... Complete Project Profile

555 - DLCO Bates Street Tunnel (Carson Circuit)
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Hand Tunneling	Steel/Wood	Pittsburgh, PA	City of Pittsburgh	Mixed Face	58' x 53" x 52"
	SUMMARY: Bradshaw Construction Corp. has recently completed the installation of 58 linear feet of 48 inch wood box tunnel as part of Duquesne Light’s Carson Circuit Project in Pittsburgh, PA. The tunnel was hand mined under Bates Street in soil that consisted primarily of decomposed shale. Complete Project Profile

554 - MD RT 301 24" Force Main
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Waldorf, MD	St. Charles Companies	Soft Ground	355' x 43"Ø
	SUMMARY: Bradshaw Construction Corp. completed the installation of 355 linear feet of 43 inch steel casing and 24 inch ductile iron pipe under Smallwood Road as part of Charles County’s US 301 Force Main Project. A 30 foot by 16 foot steel sheeted shaft was constructed for the launch at 15 vertical feet deep. The casing was jacked behind a microtunnel boring machine in silty sand and clay. Complete Project Profile

553 - West End Trunk Line Microtunnel Project
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Coatesville, PA	PAW	Rock	1017' x 59" Ø
	SUMMARY: To increase capacity and replace an aging sewer pipeline through the Arclermittal Steel facility in Coatesville, PA, Pennsylvania American Water needed to construct a new 30" gravity sewer that would not pass down the plant's main thoroughfare. Bradshaw Construction was contracted to build the trenchless portion this new line parallel to Valley Road. The 1,017' long tunnel was constructed in a... Complete Project Profile

552 - ODEC Wildcat Point Raw Water Supply
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Peach Bottom, PA	ODEC	Mixed Face	830' x 60"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. These pipelines run through an 830', 60" diameter microtunneled Permalok® steel casing, completed in June... 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

551 - Crabtree (Phase II) & Upper Pigeon House (Phase I) Interceptor Tunnels, Schedule 1 & 2
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Raleigh, NC	City of Raleigh	Mixed Face	1,685' x 75.4" & 1,007' x 60"Ø
	SUMMARY: The City of Raleigh, NC Public Utilities Department has constructed a major upgrade to its Crabtree Creek Interceptor system designed to alleviate hydraulic restrictions, accommodate future projected flows, and minimize SSOs by installing 41,000 lf of 54”, 60”, and 72” gravity sewer. A total of 5,000 lf broken into 14 separate drives by slurry microtunneling methods that went underneath... Complete Project Profile

550 - SAWS WRIPP Segment 2B
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Von Ormy, TX	SAWS	Mixed Face	1,269' x 73.5"Ø
	SUMMARY: Bradshaw Construction completed two drives with four shafts (two per drive) at each tunnel location for a new waterline. The Medina River drive (726 linear feet) included a 70 and 105 foot deep shafts, respectively. The second tunnel at Medio Creek (543 linear feet) consisted of 50 and 55 foot shafts, respectively. 73.5 inch steel casing was installed by slurry microtunneling for both drives... Complete Project Profile

549 - 36" Southwest Transmission Main Relocation
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Elkridge, MD	Howard County DPW	Mixed Face	380' x 60'' Ø
	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

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

548 - Sewerage System Improvements Division C, Phase 1 & Suction Lines
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Portsmouth, VA	HRSD	Soft Ground	110' x 43'' Ø
	SUMMARY: Bradshaw Construction microtunneled 110 linear feet of 43 inch steel casing under a CSX railroad track in Portsmouth, VA. The subsurface conditions consisted of loose, poorly graded & silty sand (SP-SM), below the groundwater table. Settlement points were monitored along the railroad, with all readings measuring less than 1/8 of an inch. Mining was conducted on a 24/7 basis per the requirements... Complete Project Profile

547 - College Drive Waterline Phase II
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Suffolk, VA	City of Suffolk	Soft Ground	370' x 30'' Ø
	SUMMARY: Bradshaw Construction microtunneled a single 370 linear feet drive of 30 inch steel casing under I-664 in Suffolk, VA. The subsurface conditions consisted of loose clayey & silty sands (SC & SM) below the groundwater table. Settlement was less than an 1/8 of an inch. Bradshaw installed a 16 inch restrained joint ductile iron pipe for a water main inside the jacked casing. Since this was a... Complete Project Profile

546 - Myrtle / Morehead Storm Drainage Improvements, Phase 1
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Hand Tunneling	NATM/SEM	Charlotte, NC	City of Charlotte	Mixed Face	150' x 13" Ø
	SUMMARY: Bradshaw constructed a 13’ horseshoe shaped tunnel 20’ under Morehead Street in downtown Charlotte, NC. The 150’ long was tunnel part of a storm drainage improvement project. The tunnel was designed & constructed using the sequential excavation method (SEM), a hand mine technique using reinforced shotcrete for initial tunnel support. Portions of the tunnel were in mixed face conditions... Complete Project Profile

545 - Water Treatment Plant 5 MGD Capacity Expansion New Raw Water Pump Station
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Livingston, TX	TRA	Soft Ground	780' x 36" Ø
	SUMMARY: Bradshaw was contracted to install twin 36 inch steel casings from a 30 foot deep pump station shaft at the shoreline of Lake Livingston Reservoir to an intake cofferdam in the lake. Each microtunneled casing was 390 foot long and used to install 24 inch ductile iron carrier pipes. The soil conditions consisted of clay and sandy silt 20 feet below the water table. Due to the non-cohesive... Complete Project Profile

544 - CIAC Water Project Segment 2, Phase 1: Rivercrossing
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Tampa, FL	City of Tampa	Mixed Face	428' x 60" Ø
	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 428' 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

544 - CIAC Water Project Segment 2, Phase 1: Rivercrossing
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Shaft Work	Slurry	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

543 - Carson Loop Water Main Replacment Phase VI-B
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Leeds, AL	Birmingham Water Works & Sewer Board	Mixed Face	1174' x 59" Ø
	SUMMARY: Bradshaw Construction Corporation completed a microtunnel drive crossing under an interstate and state highway in Birmingham, Alabama. The project consisted of 1,174 feet of 59 inch jacked steel casing for a 36 inch ductile iron water main. Ground cover under the highways ranged from 10 to 100 feet while shafts were an average of 22 feet deep. Mining conditions began with a mixed face of... 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

541 - Mansfield Wastewater Treatment Plant - Phase 1, Raw Water Intake & Pump Station
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Austin, TX	Travis County	Mixed Face	530' x 43" Ø
	SUMMARY: Bradshaw was selected to install a 43 inch steel casing by microtunnel outside Austin, TX. The microtunnel was launched from a 190 foot deep shaft at the Mansfield Dam on Lake Travis. The 530LF of lined and coated casing was microtunneled into Lake Travis and the MTBM was recovered underwater. Many of the challenges of the project were related to the deep shaft, underwater MTBM recovery and the... 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

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

539 - Liberty Heights Handmine
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Hand Tunneling	Steel/Wood	Baltimore, MD	City of Baltimore	Rock	16' x 48" x 48"
	SUMMARY: Bradshaw installed 16 linear feet of a 48 inch woodbox tunnel in rock under Hilton Street. The tunnel accommodated a new sewer line in a residential area of the City of Baltimore. Tunneling was preferred over open cut by both the owner and the general contractor due to the disturbance associated with open cut rock excavation. Complete Project Profile

538 - Service Customer Built - DC-3rd & H Street, NW
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Hand Tunneling	Steel/Wood	Washington, D.C.	District of Columbia	Soft Ground	16' x 48" x 48"
	SUMMARY: Bradshaw installed approximately 16 feet of 48 inch woodbox tunnel and ductbank to connect an existing basement to an electrical vault in downtown Washington, DC. Tunneling was deemed a more suitable alternative to traditional trenching methods, because tunneling avoided disruption to road and pedestrian traffic, and eliminated the need to demolish and replace existing surface improvements. Complete Project Profile

537 - Johns Hopkins Hospital Nelson Harvey Extension Enhancements, Wolfe Street
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Hand Tunneling	Steel/Wood	Baltimore, MD	Johns Hopkins Hospital	Mixed Face	85' x 48" x 48"
	SUMMARY: Bradshaw Construction was contracted to hand mine a 48 inch by 48 inch wood box tunnel to house a 10 inch polyvinyl chloride pipe and an 18 inch ductile iron pipe. Unanticipated rock was encountered during mining and was removed with pneumatic chisels and hammers. The tunnel was performed due to the close proximity of existing buildings and structures which did not allow for open cut... Complete Project Profile

536 - Emergency Generator Replacement John Adams Building
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Hand Tunneling	Steel/Wood	Washington D.C.,	The Architect of the Capitol	Soft Ground	12' x 60" Ø
	SUMMARY: Bradshaw installed 12 linear feet of a 60 inch liner plate tunnel in sandy material under a security wall footing at the John Adams Building in downtown Washington, DC. The tunnel allowed for the connection of a new stormwater management structure to an existing manhole, without disruption to surface features or pedestrian traffic. Complete Project Profile

534 - Odenton Town Center Sewer Interceptor
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Odenton, MD	Anne Arundel County	Soft Ground	280' x 43" Ø
	SUMMARY: After another subcontractor failed to complete a guided-bore, Bradshaw Construction was contracted for the installation of 280 linear feet of 43 inch steel casing and a 30 inch ductile iron sewer pipe for an interceptor. The casing was jacked behind a microtunnel boring machine through medium dense sands and sticky clay below the water table. Performing the microtunnel out of a shaft that was... Complete Project Profile

533 - Fort Meade Reclaimed Water
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Laurel, MD	Howard County	Soft Ground	631' x 43"-60" Ø
	SUMMARY: Bradshaw Construction installed a) 240 linear feet of 60 inch steel casing to house twin 20 inch ductile iron water lines under MD Route 32 and b) 410 linear feet of 43 inch steel casing for a 24 inch ductile iron water line under the Little Patuxent River as part of the Fort Meade Reclaimed Water Project. The casings were jacked behind a microtunnel boring machine in soft ground conditions... Complete Project Profile

532 - South Platte Interceptor
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Brighton, CO	MWRD	Mixed Face	2,620' x 78"- 96" Ø
	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

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

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

529 - McMillian Stormwater Storage
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Hand Tunneling	Steel/Wood	Washington D.C.,	DCW	Soft Ground	35' x 72"Ø
	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

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

528 - Children's Hospital of Richmond Pavilion
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Hand Tunneling	Steel/Wood	Richmond, VA	VCU-CHoRP	Soft Ground	180' x 96"-132" Ø
	SUMMARY: As part of a design/build project, Bradshaw Construction constructed two utility tunnels for the extension to the Children's Hospital of Richmond. Excavation for the first tunnel consisted of 132 inch diameter liner plate with 96 inch reinforced concrete pipe as final lining. The ground conditions were lean clays overlaid with gravely sand in the crown. The second tunnel was for 96 inch liner... Complete Project Profile

527 - River Road Interceptor
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Prospect, KY	Louisville & Jefferson MSD	Soft Ground	1,133' x 97.91"Ø
	SUMMARY: Bradshaw Construction completed 1,133 foot microtunnel of 96 inch steel casing in a single drive for the Metropolitan Sewer District, located just outside of Louisville, KY. The tunnel was a contractor bid alternate design from (6) separate tunnels to (1) cost-effective large, long tunnel. A 42 inch fiberglass sewer and 30 inch PVC force main were installed within the casing and grout... Complete Project Profile

526 - Smith WWTF Force Main Phase B
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Mobile, AL	City of Mobile	Soft Ground	240' x 60" Ø
	SUMMARY: Bradshaw Construction installed 240 linear feet of 60 inch Permalok steel casing by microtunneling. The welded steel casing was installed on a 24/7 schedule in soft ground below the water table underneath a CSX railway. A 42 inch ductile iron carrier pipe was installed through the tunnel. Recovery of the MTBM within flowing ground adjacent to a truck route created additional complications that... Complete Project Profile

525 - East Princess Anne Trunk Force Main Reinforcement-Section A
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Virginia Beach, VA	HRSD	Soft Ground	336' x 60"Ø
	SUMMARY: Bradshaw Construction microtunneled 336 linear feet of 60 inch steel casing at the intersection of Nimmo Parkway and General Booth Boulevard in Virginia Beach, VA. The subsurface conditions consisted of medium dense, poorly graded, sand (SP-SM) below the groundwater table. Settlement points were monitored along the alignment in the streets. Minimal settlement was measured and well within the... Complete Project Profile

524 - Smith WWTF Force Main Phase A
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Mobile, AL	City of Mobile	Soft Ground	120' x 60"Ø
	SUMMARY: Bradshaw Construction installed 120 linear feet of 60 inch welded steel casing by microtunnel. We overcame a significant change in ground conditions from the bid documents to mine through a full face of clay underneath the water table crossing below Central Illinois Railroad. In addition, the reception plan was modified due to utility conflicts which the General Contractor encountered during... Complete Project Profile

523 - 42 Inch Force Main - 6th and Canal Pump Station PS to Angelica Creek
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Reading, PA	City of Reading	Mixed Face	436' x 60" Ø
	SUMMARY: Bradshaw constructed (2) shafts, (1) 9 foot diameter receiving shaft and (1) 30 foot diameter launching shaft for mining 436 linear feet and installing 60 inch steel casing by microtunneling for a 42 inch ductile iron force main under Schuykill River. Due to the possibility of contaminated groundwater and the need to minimize dewatering on the shaft excavation, it was necessary to install secant... Complete Project Profile

522 - Holy Cross Hospital-Silver Spring-Phase 1B
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Hand Tunneling	Steel/Wood	Silver Spring, MD	Holy Cross Hospital	Rock	40' x 48" x 48"
	SUMMARY: Bradshaw constructed a 48 inch by 48 inch (ID) wood box tunnel under the loading dock for the Holy Cross Hospital in Silver Spring. MD. The over all project was to expand the campus to include a new patient tower for 150 new private patient rooms, a four-level parking garage expansion to accommodate an additional 300 parking spaces, and the central utility plant serving the existing campus... Complete Project Profile

521 - Crabtree Basin Waste Water Conveyance Phase 1
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Raleigh, NC	City of Raleigh	Mixed Face	660' x 60"-72"Ø
	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

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

520 - MDC Thermal Plant Interconnect Project
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Miami, FL	MDC WASD	Soft rock	880' x 37.5" Ø
	SUMMARY: Bradshaw Construction contracted with Consolidated Edison (CES) to install 24" chilled water lines on an accelerated schedule in downtown Miami, Florida. The project consisted of open-cut, shafts, and installing 36" Permalok steel casing by microtunneling through limestone under city streets and the CSX Railroad. Four seperate tunnels were launched out of twin launch shafts. The launch shafts... 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

518 - New Ragged Mountain Dam
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Hand Tunneling	Drill and Blast	Charlottesville, VA	RWSA	Rock	482' x 114"Ø
	SUMMARY: As part of improvements to increase the capacity of the Ragged Mountain Dam in Charlottesville, VA a tunnel was built to convey primary spillway discharges and house the 36 inch diameter raw water intake pipe which will convey water from the reservoir to the existing treatment facilities near the University of Virginia campus. The 10-foot horseshoe shaped tunnel was 482-feet long. It was... 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

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

515 - I-66 Sanitary Sewer Crossing
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Fairfax, VA	Fairfax County, VA	Mixed Face	330' x 43" Ø
	SUMMARY: Bradshaw Construction contracted with the Fairfax County Department of Public Works to install a new 18" sanitary sewer line across I-66, abandoning a previously installed line. During shaft installation, unforeseen partially weathered schist was encountered that could only be excavated using a hammer drill. Fairfax County performed additional geotechnical investigation to determine the extent... Complete Project Profile

513 - NW 170th Street
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Hialeah, FL	Miami-Dade WASD	Mixed Face	524' x 54" Ø
	SUMMARY: Bradshaw Construction installed 524 linear feet of 52.5 inch Permalok steel casing by microtunneling underneath the heavily traveled I-75 highway. We then installed a 36 inch ductile iron carrier pipe within the tunnel as a new water main. Bradshaw assisted the General Contractor with subcontractor supervision at no additional cost, helping to insure quality of the shaft and concrete work... Complete Project Profile

512 - I-95/MD-43 ETL Interchange
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Rosedale, MD	MTA	Soft Ground	468' x 87.5"
	SUMMARY: This project involved jacking 468 feet of 87.5" steel casing under I-95 near Baltimore, MD. The soil conditions included sand, silt, & clay below the water table. Microtunneling was required by the owner due to the ground conditions and due to the sensitivity of I-95 (an 8 lane highway) to any disturbance. The casing was installed on line and grade without incident. Bradshaw also installed... Complete Project Profile

510 - McKinley Street Interceptor
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Hollywood, FL	City of Hollywood	Soft Ground	300' x 96" Ø
	SUMMARY: Bradshaw Construction installed a total of 300 linear feet of 96 inch Permalok steel casing in two separate drives. The first drive was 75 linear feet under US Route 1 and the second was 225 linear feet under both Dixie Highway and Florida East Coast Railroad. A 66 inch prestressed concrete cylinder pipe was installed within the steel casing for both drives. The tunnels were constructed in... Complete Project Profile

509 - OSU Chilled Water Microtunnel
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Columbus, OH	Ohio State University	Mixed Face	648' x 60.5" Ø
	SUMMARY: As part of a major construction project at the Ohio State Medical Center, new chilled water distribution pipelines were designed under the very busy and congested campus. The design included twin pipe-jacked casings under the areas where trenching would have been untenable. Microtunneling was specified. Bradshaw installed 4 microtunnels through glacial deposits below the groundwater table. Complete Project Profile

507 - Little Patuxent Parallel Interceptor Sewers 11
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Columbia, MD	Howard County	Mixed Face	1,565' x 60" Ø
	SUMMARY: This project involved the construction of six tunnels, totaling 1,600'. The tunnels passed under Maryland State and Howard County roads on three phases of Howard County's Little Patuxent Parallel Interceptor project. 60" of jacked steel casing was used to install 36 to 42" of fiberglass reinforced carrier pipe for a gravity sewer. Subsurface conditions ranged from alluvial deposits of gravel and... Complete Project Profile

505 - Piney Branch Sewer Interceptor Upgrade - Phase 1
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Waldorf, MD	Charles County	Soft Ground	1,600' x 60" Ø
	SUMMARY: Bradshaw Construction completed five tunnels, totaling 1600', by microtunneling below lakes, swamps, and roadways. The tunnels were for Charles County's Piney Branch Sewer Interceptor Phase 1. 60" jacked steel casing was used to install 42" PVC carrier pipe for a gravity sewer. Subsurface conditions included silt, clay, and sand. Bradshaw Construction also installed five steel sheeted jacking... 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
Microtunneling	Slurry	Indianapolis, IN	Citizens Energy Group	Mixed Face	2,740' x 53" Ø
	SUMMARY: Bradshaw Construction installed 2,740' of 42" 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'. The microtunneling was accomplished in four drives, the longest of which was 810'. Six access shafts were constructed using steel ribs and liner plates (16' and 20' in diameter) and... 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

502 - Granby Street Sewer
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Hartford, CT	Hartford Metropolitan District	Soft Ground	2523' x 53"-74" Ø
	SUMMARY: Bradshaw Construction Corporation contracted with Manafort Brothers, Inc., constructing three tunnels via microtunneling totaling roughly 2,500 linear feet. Individual tunnels were mined at lengths of 145 linear feet, 950 linear feet, and three runs collectively totaling 1560 linear feet, ranging in sizes from 42 inch to 60 inch in diameter. Tunnels were constructed through very soft silts and... Complete Project Profile

501 - Little Patuxent Parallel Interceptor Sewers 9
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Columbia, MD	Howard County	Mixed Face	1,565' x 60" Ø
	SUMMARY: This project involved the construction of six tunnels, totaling 1,600'. The tunnels passed under Maryland State and Howard County roads on three phases of Howard County's Little Patuxent Parallel Interceptor project. 60" of jacked steel casing was used to install 36 to 42" of fiberglass reinforced carrier pipe for a gravity sewer. Subsurface conditions ranged from alluvial deposits of gravel and... Complete Project Profile

500 - Cow Branch Sewer Replacement
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Woodbridge, VA	PWCSA	Soft Ground	944' x 43" Ø
	SUMMARY: The Cow Branch Sewer project in Woodbridge, VA, consisted of the installation of approximately 8,000' of new gravity sewer main in the 8" to 36" diameter size range. 944' of 36" sewer main was to be installed via microtunneling under a wetland area that empties into the Potomac River. This project represented the Prince William County Authority's (PWCSA) first microtunneling project. In lieu of... 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

498 - Lafayette Street Pedestrian Tunnel
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Hand Tunneling	Steel/Wood	Tallahassee, FL	FDOT	Soft Ground	55' x 144 " Ø
	SUMMARY: Bradshaw Construction built a 55' long hand mine liner plate tunnel for Florida State University to prevent pedestrian overflow onto Lafayette Street after FSU football games. Bradshaw has a long history of building liner plate tunnels; what made this project unique was the active CSX railroad tracks only 6.5' overhead. Trains traveled over the tunnel many times per day during construction... 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

496 - NW Precinct Utility Infrastructure
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Athens, GA	UGA	Soft Ground	236' x 59" Ø
	SUMMARY: As part of a new chiller plant and distribution network, the University of Georgia had to install two 20" chilled water pipelines under the busy intersection of Baxter and Lumpkin Streets on campus. The design called for a single 59" steel casing to house both lines. Trenchless construction by microtunneling was specified to reduce impacts to the surface traffic and buried existing utilities and... Complete Project Profile

494 - Manchester Creek Outfall
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Rock Hill, SC	City of Rock Hill	Soft Ground	311' x 59" Ø
	SUMMARY: Bradshaw jacked a 59" diameter steel casing 311 feet under interstate highway I-77 behind a microtunnel boring machine (MTBM). The subsurface conditions consisted of clay and sand below the groundwater table. In order to mobilize to the jacking shaft, about a mile of forest was cleared and the equipment was dragged in on sleds. A slide rail system was used for the jacking shaft with special... Complete Project Profile

493 - Delta Power Intake/Blowdown Tunnel
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Delta, PA	Calpine Corp.	Mixed Face	1,515' x 60" Ø
	SUMMARY: The Delta Power Plant project in Delta, PA, consisted of a 565 MW power generating facility that recovers heat from gas exhaust leaving gas turbines. The turbines burn either natural gas or low sulfur diesel fuel oil. A microtunnel solution to installing the cooling water intake and return was developed by the owner, contractor, and tunnel subcontractor. 1,515' of 60" steel casing was jacked... Complete Project Profile

492 - Route 13 Interceptor
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Dover, DE	City of Dover	Soft Ground	239' x 50" Ø
	SUMMARY: Bradshaw Construction completed two tunnels of 50" steel casing totaling 291' in Dover, DE. The steel casing was installed by microtunneling and used for 24" and 27" PVC sanitary sewer. There were two main challenges for the project. The greatest challenge was retrofitting a jacking shaft meant for auger-boring to suit the needs of slurry microtunneling. To do this, our crew formed and poured... Complete Project Profile

491 - FDOT SR 55 US-19 Roadway Improvements
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Clearwater, FL	FDOT	Soft Ground	636' x 60" Ø
	SUMMARY: Bradshaw Construction mined 2 separate microtunnel drives for the Florida Department of Transportation. One drive was 300 linear feet and the other run was 336 linear feet. A 48 inch and a 42 inch ductile iron pipe water main was installed within the 60 inch steel casing, respectively. The tunnels were below the water table and at a depth ranging from 10 to 30 feet deep. The soils consisted of... Complete Project Profile

490 - Little Patuxent Sewer Phase 3
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Hand Tunneling	Drill and Blast	Savage, MD	Howard County	Rock	355' x 96" Ø
	SUMMARY: Bradshaw Construction hand drilled and blasted a 96 inch tunnel, 355 linear feet in length, to accommodate a 42 inch FRP sanitary sewer. A combination of 96" horseshoe ribs and wood lagging, as well as rock bolts and wire mesh were used to support the seamy and blocky rock patterns. Rock samples showed rock with unconfined compressive strength greater than 55 KSI. There were noise... 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

487 - Little Patuxent Parallel Interceptor Sewers 2
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Columbia, MD	Howard County	Mixed Face	450' x 59" Ø
	SUMMARY: This project involved the construction of two tunnels, totaling 450'. The tunnels passed under Maryland State and Howard County roads on three phases of Howard County's Little Patuxent Parallel Interceptor project. 59" of jacked steel casing was used to install 42" fiberglass reinforced carrier pipe for a gravity sewer. Subsurface conditions ranged from alluvial deposits of gravel and cobbles to... Complete Project Profile

486 - Kennesaw Pedestrian Tunnel
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Hand Tunneling	Steel/Wood	Kennesaw, GA	Kennesaw Pedestrian Tunnel	Soft Ground	115' x 13' Ø
	SUMMARY: Bradshaw hand tunneled 7 feet under a busy CSX Railroad serving Atlanta, GA to install 115 feet of 13 foot diameter tunnel with only 5'-7' of cover between the tunnel and the tracks. The tunnel supports were steel liner plate lined with epoxy paint. It was part of a new park celebrating railroad history and provided a much needed pedestrian underpass. Compensation grouting and real-time... Complete Project Profile

485 - Potomac Interceptor Sewer System Improvements
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Arlington , VA	Arlington County	Mixed Face	1,193' x 59" Ø
	SUMMARY: Bradshaw Construction has completed three tunnels by microtunneling, totaling 1,183 linear feet, below highways and the Arlington National Cemetery for Arlington County's Potomac Interceptor. 60-inches of steel casing was installed by microtunnel through soft ground to place 42-inch FRP carrier pipe for a gravity sewer on one tunnel. 48-inch RCP was direct jacked through rock and mixed face... Complete Project Profile

484 - Sweeney Water Treatment Plant Expansion
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Wilmington, NC	City of Wilmington	Soft Ground	200' x 42"Ø
	SUMMARY: Bradshaw was contracted to install 200 linear feet of 42 inch steel casing by slurry microtunneling for the Sweeney Wastewater Treatment Plant near by Cape Fear River to house a 30 inch ductile iron pipeline. Bradshaw encountered several debris obstructions ranging from cast iron to wood. Complete Project Profile

483 - Allen's Creek Water Transmission Main
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	St. Petersburg, FL	City of St. Petersburg	Soft Ground	229' x 51" Ø
	SUMMARY: Bradshaw Construction was installed 229 linear feet of 51" steel casing by microtunneling for the City of St. Petersburg Water Department. A 36 inch water transmission main was installed inside the casing. During mining, Bradshaw managed to maintain line and grade through very loose sand to medium dense fine sand and slightly silty sand, all below the water table. Complete Project Profile

482 - Dundalk Marine Terminal
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Pipe Rehab	Sekisui SPR	Baltimore, MD	Honeywell, Inc.	Soft Ground	8,552' x 15'-94" Ø
	SUMMARY: Bradshaw Construction Corporation successfully rehabilitated 75 storm drains at the Dundalk Marine Terminal located in Baltimore, MD. This was the first time that Sekisui's SPR reline technology was used in a non-man-entry fashion in the US - highlighting our commitment to incorporating cutting edge technologies in our work. Sekisui SPR was used to rehabilitate the storm drains that ranged from... Complete Project Profile

481 - CIAC Segment 1 Water Transmission Main
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Tampa, FL	City of Tampa	Soft Ground	2,028' x 60" Ø
	SUMMARY: Bradshaw Construction was contracted by CH2MHill Constructors Inc. to design build 2,028 linear feet for 60 inch steel casing by microtunneling for a 42 inch ductile iron water main. Bradshaw worked along side Garney Company who installed the open cut portion of the project. The ground conditions consisted of soft ground below the water table. Most of the drives were completed under a heavily... Complete Project Profile

480 - Belmont North Relief Interceptor - Section 1
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Indianapolis, IN	City of Indianapolis	Mixed Face	4,000' x 87.5" 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

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

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

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

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

476 - Kirkwood Road Tunnels
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Hand Tunneling	Steel/Wood	Arlington, VA	Dominion Power	Mixed Face	276' x 48" x 48"
	SUMMARY: Bradshaw Construction completed 276' of 48" x 48" hand-mined wood box tunnels for electrical conduit. The main challenges of the project were not known when the project began. The tunnels were supposed to be in soft ground, but partially complete with the first tunnel our crew encountered some hard rock. There was great difficulty in removing the rock for 25' of the tunnel without blasting or... 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

473 - CIAC Water Transmission Main MLK / IDA
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Tampa, FL	City of Tampa	Soft Ground	477' x 60" Ø
	SUMMARY: This project consisted of a 477 linear feet of microtunnel for the 12th Street Force Main. We assisted in the construction of shafts. 60 inch Permalok steel casing was used for the microtunneling and 42" ductile iron carrier pipe that was installed within the casing and grouted in place. Ground conditions were soft and the tunnel was mined at minimum cover. Complete Project Profile

472 - Sewer Improvements at Fenwick Road and Essex Avenue
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Pilot Tube	Fairfax County, VA	Fairfax County DPWES	Soft Ground	1,800' x 16" Ø
	SUMMARY: Bradshaw Construction installed 1,800' of 12" vitrified clay pipe to increase sewer capacity in two neighborhoods in Fairfax County, VA. The line was installed by pilot tube microtunneling through clay, silt, and sand. Due to some cobbles that were encountered, and several existing utilities, Bradshaw was required to perform some of the sewer installation by Open-Cut. There was also a previously... Complete Project Profile

471 - Suwanee Pedestrian Tunnel
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Hand Tunneling	Steel/Wood	Suwanee, GA	City of Suwanee	Soft Ground	62' x 156 " Ø
	SUMMARY: Bradshaw Construction installed 62' of 156" steel liner plate tunnel by conventional hand mine methods through a railroad embankment for a pedestrian tunnel. Hand mine techniques were utilized to install the liner plate tunnel under an active Norfolk Southern Railroad with only 7' of cover. Mining took six days to complete, working around the clock. After completion of the excavation, a shotcrete... Complete Project Profile

470 - I-275 Drainage Tunnels
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Tampa, FL	FDOT	Mixed Face	2,636' x 51"- 95" Ø
	SUMMARY: Bradshaw Construction was contracted for this signature FDOT project to install the first one-pass microtunneling system using reinforced concrete pipe from 42 inch to 72 inch. The total linear footage for this gravity storm sewer project was approximately 2,600. The cover below the heavily traveled highways was less than one diameter in most instances to create the gravity flow storm system... Complete Project Profile

469 - Fanwood Storm Sewer Reconstruction
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Pipe Rehab	Sekisui SPR	Plainfield, NJ	Borough of Fanwood	N/A	1,000' x 72" Ø
	SUMMARY: Bradshaw was contracted to rehabilitate a sewer pipe in a residential area by relining. The steel reinforced spiral wound lining was used for 264 linear feet of 66 inch and 1,000 linear feet of 72 inch corrugated metal pipes. This also included grouting in place. The greatest challenge of the project was working in a live storm sewer which required careful attention to the weather as bypass... 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

466 - 12th Street Force Main Replacement
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Tampa, FL	City of Tampa	Soft Ground	2,217' x 42"-48" Ø
	SUMMARY: Bradshaw Construction was part in a Tampa Design/Build project. This project consisted of 3 separate drives mined by microtunneling. The first drive consisted of 477 linear feet for 60 inch steel casing to accommodate a 48 inch force main. The second was 450 linear feet and the third at a length of 1,290 linear feet for 60 inch steel casing for a 42 inch force main. These drives were for... Complete Project Profile

465 - City of Cumming Raw Water Intake
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Cumming, GA	City of Cumming	Soft Ground	350' x 66" Ø
	SUMMARY: The City of Cumming, GA constructed a new raw water intake in Lake Lanier. Bradshaw Construction was contracted to install the 66" steel casing pipe from the on shore pump station shaft to the intake structure at the bottom of the lake. The pump station shaft was constructed by the jet grout method. Bradshaw jacked the casing using a slurry microtunneling machine. The intake pipeline was designed... Complete Project Profile

464 - Lower Catoma Interceptor Replacement
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Montgomery, AL	City of Montgomery	Soft Ground	440' x 83" Ø
	SUMMARY: Bradshaw Construction Corporation completed four soft ground tunnels under state roads and a CSX railroad by microtunneling as part of a 37,000 linear foot long sewer pipeline project. The tunnels ranged in diameter from 83 to 96 inches and 110 to 220 linear feet in length. The smaller tunnels were direct jack 78-inch Hobas pipe, and the larger railroad tunnels were 2-pass Permalok steel casing... Complete Project Profile

462 - Bartow-NE Transmission Line
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	St. Petersburg, FL	Progress Energy	Soft Ground	607' x 51" Ø
	SUMMARY: Bradshaw was contracted to pipe jack and install a 44 inch Hobas pipe that was provided by Blevins Road Boring. Inc. The drives consisted of (2) twin runs to accommodate Progress Energy's underground transmission lines. The first twin run was 128 linear feet and the second was 207 linear feet, for a total of 607 linear feet for the project. The ground conditions consisted of soft ground... Complete Project Profile

461 - Briar Creek Relief Sewer Phase 1B
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Hand Tunneling	Steel/Wood	Charlotte, NC	Charlotte-Mecklenburg Utility Dept.	Mixed Face	165' x 96" Ø
	SUMMARY: Bradshaw was contracted to install 165 linear feet of 60 inch fiber reinforced water main pipeline in South Charlotte, NC. The carrier pipe was housed within a 96" liner plate tunnel support system. This was part of Charlotte Utility Department's $1-Billion, 5-year, Capital Improvement Plan. Complete Project Profile

459 - Knight Theater Tunnels
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Hand Tunneling	NATM/SEM	Charlotte, NC	Wachovia Bank	Mixed Face	160' x 13' x 16.5'
	SUMMARY: Bradshaw Construction designed and built two 13' tall by 16.5' wide shotcrete horseshoe-shaped tunnels, totaling 160', for the city of Charlotte, NC. The tunnels were designed as initial/final shotcrete linings, with a sprayed water barrier between shotcrete layers. In addition, the mix design was supplemented with a cementitious admixture to develop internal water resistant properties in the... 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

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

457 - Battery Park Trunk Sewer Tunnel
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Hand Tunneling	Steel/Wood	Richmond, VA	City of Richmond	Soft Ground	200' x 96" Ø
	SUMMARY: As part of a new 3,400' by-pass sewer tunnel, Bradshaw also hand tunneled a total of 200’ of 96” liner plate for a 72” fiberglass storm sewer pipe. Each hand tunnel intersected the 144" rib and board tunnel for underground Y connections or was combined in three way manholes at the shafts. Just as for the primary by-pass tunnel, other major challenges were the extremely accelerated... Complete Project Profile

454 - Claymount Avenue Sewer Repair
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Pipe Rehab	Slip Lining	Baltimore, MD	Baltimore City	Soft Ground	168' x 30" Ø
	SUMMARY: Bradshaw Construction was contracted by Baltimore city to perform an emergency repair and rehabilitation of a collapsed brick sewer causing sewage back-up and flooding in a residential area. Bradshaw excavated down and removed the damaged portion along with the top of the sewer. Then, 30" PVC slip-lining pipe was inserted into the sewer and pushed along the existing pipeline. When the entire... Complete Project Profile

453 - Herbert Run Interceptor
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Landsdowne, MD	Baltimore County DPW	Soft Ground	905' x 63" Ø
	SUMMARY: Bradshaw Construction completed 4 drives of 63" Permalok steel casing by microtunneling in Landsdowne, MD. The 4 drives totaled 905 LF and were under CSX and Amtrak railroads, and US-1 and I-895 highways. The microtunnels were completed using a Herrenknecht 1200TC with a Soft Ground cutting head. The tunnels were originally designed to be 72" Hand Mined Liner Plate, but were changed to Permalok... Complete Project Profile

452 - Dulles Dedicated Fire System
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Dulles Airport, VA	MWAA	Rock	2,100' x 43" Ø
	SUMMARY: Bradshaw Construction installed 2,100' of 43" Permalok steel casing for the 18" dedicated fire system. The tunnels were installed by microtunneling through shale beneath active runways, taxiways, and taxi lanes. The microtunneling was completed in four segments, the longest being 585' long under Runway 19L-01R. Bradshaw also installed the 18" DIP in the tunnels once mining was completed. Crews... Complete Project Profile

451 - Brushy Creek Sewer
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Hand Tunneling	Drill and Blast	Greer, SC	Western Carolina Sewer Authority	Rock	240' x 96"Ø
	SUMMARY: Complete Project Profile

449 - Sugar Creek WWTP Tunnel
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Hand Tunneling	Steel/Wood	Charlotte, NC
	SUMMARY: Complete Project Profile

446 - Indian Creek Sewer Rehabilitation
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Pipe Rehab	Slip Lining	Atlanta, GA	City of Atlanta	Rock	400' x 86" Ø
	SUMMARY: Bradshaw Construction was selected by USF&G Surety to rehab a gravity sewer that was improperly installed by Modern Continental Construction. Approximately 400' of the 36" DIP sewer had randomly floated above the design elevation when grout backfilled in tunnel. Bradshaw excavated access shafts, by-pass pumped the sewer, performed video surveys to determine the extent of floatation or... Complete Project Profile

445 - BWI Stage 3B 20" Transmission Line
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Pilot Tube	Baltimore, MD	Southwest Airlines, Inc.	Soft Ground	945' x 30" Ø
	SUMMARY: Bradshaw Construction installed 945 linear feet of 30 inch Permalok steel casing at Baltimore Washington International (BWI) airport in 3 drives under a railroad and 2 highways using the Akkerman pilot tube guided boring method. The ground conditions were extremely dense silt and sand with occasional stiff clays. Shafts for the drives were supported by steel sheeting, trench boxes as well as... Complete Project Profile

443 - Route 262 CSX Crossing
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Hand Tunneling	Steel/Wood	Staunton, VA	VDOT	Rock	75' x 120" Ø
	SUMMARY: Bradshaw Construction installed a 10'Ø Hand Mined Liner Plate tunnel under CSX Railroad in Staunton, Virginia. The tunnel was excavated from a portal through Boulder Fill in the embankment of the railroad. Due to the voids in the fill, a cementitious grout curtain was pumped over the tunnel alignment before mining. In order to mitigate the risks settlement and the danger of mining through... 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

434 - Upper Jones Falls Interceptor Sewer - Phase 2
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Baltimore, MD	Baltimore City DPW	Mixed Face	6,600' x 60" - 96" Ø
	SUMMARY: Bradshaw jacked 6,000' of 48" polycrete sewer pipe using slurry microtunneling through rock and mixed face ground conditions. The longest microtunnel drive was over 900'. Drill and blast tunneling was used for 600’ of the sewer installation. The rock strength (UCS) was up to 43,500 psi. Eleven access shafts with pre-cast manholes and/or cast-in-place structures were installed. A unique live... 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

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
Hand Tunneling	Drill and Blast	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

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

429 - Braddish Avenue Sewer Repair
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Pipe Rehab	Slip Lining	Baltimore, MD	Baltimore City	Rock	277' x 60"Ø
	SUMMARY: Bradshaw Construction Corporation installed a 60 inch liner plate tunnel to accommodate for a reinforced concrete pipe and slip-lined an existing failing 33 inch Hobas sewer pipe as part of an emergency repair for the City of Baltimore. The shaft was constructed out of steel sheeting with dimensions of 18.5 feet wide x 30 feet long x 33 feet deep. Complete Project Profile

424 - Locust Point Interceptor
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Baltimore, MD	City of Baltimore	Soft Ground	1,000 x 43" Ø
	SUMMARY: Bradshaw Construction installed 1,000 linear feet of 36 inch vitrified clay pipe using a Herrenknecht AVN 800A slurry microtunneling system. In addition, Bradshaw installed 240 linear feet of 6" vitrified clay pipe using an Akkerman “pilot tube” guided boring system. The ground conditions were silt, sand, gravel and rubble fill below the water table. Bradshaw installed jacking and... Complete Project Profile

424 - Locust Point Interceptor
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Pilot Tube	Baltimore, MD	City of Baltimore	Soft Ground	240' x 10" Ø
	SUMMARY: Bradshaw Construction installed 240 linear feet of 6" vitrified clay pipe sewer using an Akkerman GBM-240 “pilot tube” guided boring system. The ground conditions were silt, sand, gravel and rubble fill. The Akkerman GBM system pipe jacks in three passes (pilot tube, cased augers, and product pipe) for installation typically to +/-1 inch of design alignment and elevation. The pilot tube... Complete Project Profile

421 - Table Rock Reservoir Intake Tunnel
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Cleveland, SC	Greenville Water System	Rock	480' x 60" Ø
	SUMMARY: The Table Rock Intake project was a technically complex water-intake project, which required pinpoint accuracy. The project involved the installation of a raw water intake tunnel below the Cleveland, SC, dam and its associated reservoir. The project involved a marine retrieval of the MTBM via a miniscule shaft - 11' in diameter to be exact. Tunneling under a dam is inherently a highly sensitive... Complete Project Profile

420 - Susquehanna River Intake Tunnel
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Wrightsville, PA	York Water Company	Rock	640' x 59" Ø
	SUMMARY: Bradshaw jacked twin 59" diameter steel casings 320 feet using a microtunnel boring machine (MTBM). The raw water intake alignment went from a new on-shore pump station to a new underwater intake structure in the Susquehanna River. The subsurface conditions consisted of weak to strong schist. The intake structure was under about 20' of water. Several interventions were made into the head of the... 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

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

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

412 - Hillen/Ashburton Plant Bypass Pipeline
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Hand Tunneling	Steel/Wood	Baltimore, MD	Baltimore City DPW	Soft Ground	50' x 108" Ø
	SUMMARY: Bradshaw hand mined 50 feet of 108 inch liner plate for a 66 inch PCCP sewer and an 8 inch DIP water main under the CSX Railroad. Ground conditions were residual soils of silts, sands and boulders and required hand mining techniques of face breasting and crown fore poling. Bradshaw also installed a 12’ x 24’ mining shaft. The key challenges were the boulder ground conditions, proximity to... Complete Project Profile

405 - MD Route 32 Bridge Replacement
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Hand Tunneling	Steel/Wood	Sykesville, MD	MD SHA	Mixed Face	60' x 66"Ø
	SUMMARY: Bradshaw Construction hand mined a 66 inch liner plate tunnel and installed a 48 inch reinforced concrete storm drain under a CSX Railroad. The removal of boulders during shaft and tunnel excavation required extreme care so as not to cause settlement of the railroad. 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

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

390 - Libbytown Storm Drain Project
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Portland, ME	City of Portland	Soft Ground	450' x 24" Ø
	SUMMARY: This project was to install a 24" storm sewer pipe for the City of Portland, Maine. Bradshaw used an Akkerman SL-24 microtunnel boring machine to one pass pipe jack 24" Hobas sewer pipe from shafts constructed by the contractor. The challenge on this project turned out to be the ground conditions which included unexpected cobbles and boulders. These conditions stopped the microtunnel boring... 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

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

361 - Orme Street Combined Trunk Relief Sewer - Phase 3
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Hand Tunneling	NATM/SEM	Atlanta, GA	City of Atlanta	Mixed Face	2,300' x 14' x 16'
	SUMMARY: Bradshaw Construction Corporation built the first ever NATM tunnel that utilized compressed air in North America. The project involved the connection of two existing 7' diameter combined sewers to a new 12' diameter relief sewer. Connections were made at seven locations, along a 2,300' alignment in downtown Atlanta. The alignment was enveloped by adjacent structures and utilities. The project was... 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

348 - R.M. Clayton WRC Plant Expansion - Phase 3
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Hand Tunneling	NATM/SEM	Atlanta, GA	City of Atlanta	Rock	1000' x 16 ' x 16 '
	SUMMARY: Bradshaw Construction Corporation drilled and blasted 1000' of rock, and partially weathered rock, in order to install a 12' diameter wastewater pipeline for the City of Atlanta. In order to complete this project in the most expedient manner, a "no blasting" clause in the contract was waived. With the utilization of blasting, we successfully mined through ground conditions that included coming... 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

324 - Cohas Brook Interceptor - Phase 1
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Manchester, NH	City of Manchester	Mixed Face	2,400 x 54" Ø
	SUMMARY: Bradshaw installed 2,400’ of 42” RCP using an Akkerman Slurry Microtunnel Boring Machine (SL-44). There were 5 separate microtunnel drives, 3 of which encountered boulders requiring rescue shafts. Three drives crossed major highways and one drive crossed under the Pine Island Pond. The geologic report for the project stated the tunnel elevation was selected to avoid any boulders in the... 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

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

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

231 - Chesapeake Avenue Sewer
PROJECT TYPE	SUB TYPE	LOCATION	OWNER	GEOLOGY	DIMENSIONS
Microtunneling	Slurry	Edgemere, MD	Baltimore County	Soft Ground	212' x 30" Ø
	SUMMARY: In 1991, Bradshaw Construction Corporation (formerly L M Bradshaw Contracting, Inc.) installed the first jacked pipe using slurry microtunneling in the US mid-Atlantic region. An Iseki “Unclemole” microtunnel system was used to jack 212' of 30" steel casing for a 12' DIP sewer (two pass method) under a Chesapeake Bay estuary in extremely soft tidal marsh sand and silt. Bradshaw dewatered... 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
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

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