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Locations

Locations

Network of locations enables an immediate response

National Underground Group provides underground infrastructure services and technologies nationwide.

Responsive, quality service helps keep communities safe and ensure peace of mind

Operating nationwide with localized service, National Underground Group provides comprehensive solutions for underground infrastructure with utilities, municipalities, contractors and engineering firms. We are headquartered in Irvine, California, and serve customers throughout the U.S.

National Underground Group Headquarters
47 Discovery, Suite 250
Irvine, CA 92618
949-380-4161

Accumark Headquarters
9500 King Air Court
Ashland, VA 23005
804-550-7740

Benchmark Headquarters
2100 N. Hamilton Street
Richmond, VA 23230
804-550-2418

Tri-State Utilities Headquarters
2111 Smith Avenue
Chesapeake, VA 23320
757-366-9505

MARYLAND
Accumark
1005 Wilso Drive
Baltimore, MD 21223
443-567-4130

NORTH CAROLINA
Accumark
1125 Corporation Parkway, Suite 161
Raleigh, NC 27610
800-542-2290

Tri-State Utilities
3547 Denver Drive
Denver, NC 28037

OHIO
Benchmark
1340 Home Avenue, Suite 5
Akron, OH 44310
804-550-2418

VIRGINIA
Accumark
1505 Technology Drive, Suite 101
Chesapeake, VA 23320
757-277-9894

Accumark
22900 Shaw Road, Suite 123
Sterling, VA 20166
703-635-3060

Service Lines

manhole inspection

Tri-State Utilities

Tri-State Utilities provides turnkey pipeline rehabilitation solutions and utilizes industry-leading trenchless pipe lining technologies, including the cured-in-place-pipe (CIPP) lining method, on sanitary sewers and storm drains. Customers trust Tri-State Utilities for its in-depth expertise, local knowledge, faster response time, quality assurance and cost-efficiency.

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Operators running vacuum pipeline to subsurface utilities

Accumark

Accumark provides locating services for a complete Subsurface Utility Engineering field services solution. Also offering subsurface utility designation, mapping and locating services, Accumark is recognized for its safety-first focus and outstanding customer service as well as accuracy and timeliness that lead to cost savings and damage prevention.

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Benchmark operator working in location of underground utilities

Benchmark

Benchmark delivers damage prevention solutions, provides underground locating services through established 811 on-call contracts and also offers private utility-locating services. Its differentiated Single Source Damage Prevention Program delivers industry-leading accuracy ratios, on-time ticket responses and exceptional customer service. Its Single Source locating model means the company locates for one customer within a given group of locators and supervisors. By not layering multiple utilities and customers on top of each other, Benchmark is able to offer customers a professional service with quality locating, on time.

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manhole inspection

Tri-State Utilities

Tri-State Utilities provides turnkey pipeline rehabilitation solutions and utilizes industry-leading trenchless pipe lining technologies, including the cured-in-place-pipe (CIPP) lining method, on sanitary sewers and storm drains. Customers trust Tri-State Utilities for its in-depth expertise, local knowledge, faster response time, quality assurance and cost-efficiency.

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Operators running vacuum pipeline to subsurface utilities

Accumark

Accumark provides locating services for a complete Subsurface Utility Engineering field services solution. Also offering subsurface utility designation, mapping and locating services, Accumark is recognized for its safety-first focus and outstanding customer service as well as accuracy and timeliness that lead to cost savings and damage prevention.

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Benchmark operator working in location of underground utilities

Benchmark

Benchmark delivers damage prevention solutions, provides underground locating services through established 811 on-call contracts and also offers private utility-locating services. Its differentiated Single Source Damage Prevention Program delivers industry-leading accuracy ratios, on-time ticket responses and exceptional customer service. Its Single Source locating model means the company locates for one customer within a given group of locators and supervisors. By not layering multiple utilities and customers on top of each other, Benchmark is able to offer customers a professional service with quality locating, on time.

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Tailored Solutions