Projects - Microtunneling - Bradshaw Construction Corporation

TUNNELING SPECIALISTS SINCE 1963

Home

WELCOME
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

Our Work

WHAT WE DO
Microtunneling
TBM Tunneling
Hand Tunneling
Pipe Rehabilitation
Shaft Construction
Careers

WHY WORK FOR US
Career Opportunities
Our People
Employment Statements
Business With Us

PROMOTING INDUSTRY EXCELLENCE
Plan Room
Subcontractors
Suppliers
Quote
Constructabilty Review
Equipment Sales
Contact Us

WE WANT TO HEAR FROM YOU

Locations

Departments

MICROTUNNELING

Slurry

Pilot Tube

SORT BY PROJECT NUMBER | LOCATION

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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