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
949-380-4161Accumark Headquarters
9500 King Air Court
Ashland, VA 23005
804-550-7740
47 Discovery, Suite 250
Irvine, CA 92618
949-380-4161Accumark Headquarters
9500 King Air Court
Ashland, VA 23005
804-550-7740
Benchmark Headquarters
2100 N. Hamilton Street
Richmond, VA 23230
804-550-2418
Pro-Pipe Headquarters
1860 N. 95th Lane, Suite 305
Phoenix, AZ 85037
Tri-State Utilities Headquarters
2111 Smith Avenue
Chesapeake, VA 23320
757-366-9505
ARIZONA
Pro-Pipe
10297 W. Van Buren Street, Suite 18
Tolleson, AZ 85353
Pro-Pipe
4761 N. Highway Drive
Tucson, AZ 85705
CALIFORNIA
Pro-Pipe
Northern California
185 Arthur Road, Suite A
Martinez, CA 94553
Pro-Pipe
Southern California
249 S. Paseo Tesoro
Walnut, CA 91789
COLORADO
Pro-Pipe
6425 Washington Street, Unit 11
Denver, CO 80229
MARYLAND
Accumark
1005 Wilso Drive
Baltimore, MD 21223
443-567-4130
NEW MEXICO
Pro-Pipe
3330 Vassar Drive NE
Albuquerque, NM 87107
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
TEXAS
Pro-Pipe
2506 W. Marshall Drive
Grand Prairie, TX 75051
Pro-Pipe
7930 Pinemont Drive
Houston, TX 77040
UTAH
Pro-Pipe
976 N. Marshall Way, Bldg. 2, Suite 2
Layton, UT 84041
8019088581
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
Pro-Pipe
Pro-Pipe provides cross bore inspection and pre and post-construction inspections for trenchless installations. Utilizing advanced technology and sophisticated equipment, Pro-Pipe digitally maps (GIS) underground infrastructure, provides condition scoring for prioritization and assessment, and offers comprehensive maintenance and rehabilitation.
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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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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
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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Pro-Pipe
Pro-Pipe provides cross bore inspection and pre and post-construction inspections for trenchless installations. Utilizing advanced technology and sophisticated equipment, Pro-Pipe digitally maps (GIS) underground infrastructure, provides condition scoring for prioritization and assessment, and offers comprehensive maintenance and rehabilitation.
Go to Pro-Pipe Go to Pro-Pipe Go to Pro-Pipe
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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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
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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