Years Industry Experience

Total Contracts Value

State Locations

Federal Agencies Served


Miles of Pipeline

Repeat Clients


Transcon’s experience with pipelines has covered everything from permitting for pipeline protection and realignment projects to preparation of an Environmental Impact Statement in support of a water pipeline. We have performed third-party compliance inspection on behalf of agencies, navigated steep-slope priority areas, and performed long-term revegetation monitoring and noxious weed treatment. Our pipeline projects have been located in California, the Great Basin, and even the East Coast.

Select Project Descriptions

Sand Hollow Regional Water Pipeline

Transcon provided third-party environmental support for the construction of a 12-mile water pipeline, a water storage tank, and associated facilities. In addition to an Environmental Assessment, Transcon prepared a Biological Assessment, Cultural Resource Report, and Visual Resource Report. The project area contained several federally-listed species, and we worked closely with the U.S. Fish and Wildlife Service, Bureau of Land Management, and Washington County Water Conservancy District to develop unique mitigation measures to minimize impacts to desert tortoise as well as sensitive cultural and paleontological resources.

Holly Energy Partners, UNEV Pipeline

The UNEV Pipeline Project involves monitoring revegetation success on federal and tribal lands between Salt Like City, Utah, and Las Vegas, Nevada. Transcon biologists are responsible for annually surveying 85 transects to record plant community data and document factors that may be impacting revegetation (e.g., grazing, illegal right-of-way [ROW] use, erosion, etc.). Additionally, noxious and invasive weed monitoring occur along all the ROW. Currently, Transcon has met monitoring goals for approximately 85 percent of the 400-mile-long pipeline ROW.

Dominion Energy, Atlantic Coast Natural Gas Pipeline

Transcon provided compliance inspection contractor services for this pipeline project located in George Washington-Jefferson national forests and Monongahela National Forest. The project consisted of construction of a 42-inch natural gas pipeline across approximately 26 miles, crossing the Appalachian National Scenic Trail and Blue Ridge Parkway as well as steep terrain areas, rivers, and streams. The entire project ROW is approximately 600 miles, located in Virginia and West Virginia.

Pacific Gas and Electric Company, Pipeline Integrity Projects

Transcon performed permitting for Pacific Gas and Electric Company (PG&E) pipeline integrity projects for 12 years. The majority of these projects involved rerouting, repairs, or boring the pipeline within waterways. Project complexity ranged from robust routing and siting activities, public and agency engagement, site-specific permitting for waterway permits (Streambed Alteration Agreements, Water Quality Certifications, and Nationwide Permits), National Environmental Policy Act compliance, or resource inventories. The project resulted in the successful permitting of over 50 gas line integrity projects.

Other Projects

Community Pipeline Safety Initiatives (Pipeline Pathways), St. George L121, Zinc Ribbon, Northwest Pipeline Rectifier CP519, Uintah Express Pipeline, Cache Creek Crossing Pipeline Relocation Project, FL-89-1 Pipeline Replacement, WB Express Project, Buckeye Express


First-party and third-party roles

Revegetation monitoring and noxious weed treatment

Compliance inspection

Biology survey and monitoring


Routing and siting

NEPA compliance

Archaeology survey and monitoring

Wetland delineation

Feasibility studies

Visual simulations

Stormwater Pollution Prevention Plans

Environmental constraints analysis

Nesting bird survey and monitoring

Noise surveys and impact reports

Viewshed analysis

Environmental awareness trainings


County Water Conservancy Districts

Dominion Energy

Holly Energy Partners

Olsson Associates

Pacific Gas and Electric Company

Questar Pipeline Company


Arizona Game and Fish Department

Bureau of Land Management

California Bay and Conservation Development Commission

California Coastal Commission

California Department of Fish and Wildlife

California Department of Transportation

Departments of Environmental Quality

Departments of Natural Resources

Federal Energy Regulatory Commission

Local governments (cities, counties, and flood control districts)

National Marine Fisheries Service

National Park Service

State Historic Preservation Offices


U.S. Army Corps of Engineers

U.S. Fish and Wildlife Service

U.S. Forest Service

Utah Division of State History

Utah School and Institutional Trust Lands Administration

Water Quality Control Boards

“Excellent staff and very knowledgeable.”

Bill Maehl
Spectrum Engineering

View more sectors

Electric Utility Industry

Transcon is always looking for individuals dedicated to understanding and serving client needs. We’d love to have you on our team.

See our current open positions

Our Locations

Arizona1745 South Alma School Road, Suite 220
Mesa, Arizona 85210
California2455 Bennett Valley Road, Suite A200
Santa Rosa, California 95404

484 Main Street / P.O. Box 434
Ferndale, CA. 95536-0434
Utah579 West Galena Park Place, Unit 102
Draper, Utah 84020

444 South Main Street, Suite A6
Cedar City, Utah 84720
Wyoming116 4th Street, Suite 2a
Rawlins, Wyoming 82301

Certifications & Registrations

Transcon Environmental 2023