West Union, West Virginia

Sherwood VII Cryogenic Plant

Client / Owner

MarkWest Liberty Midstream & Resources, L.L.C.


Oil, Gas & Chemicals


Graycor Industrial

Project Scope

MarkWest called upon Graycor Industrial Constructors to expand the Sherwood Processing Facility by constructing a seventh cryogenic gas processing plant at the West Union, West Virginia, complex.

The scope of work to build the 200-MMscf/d cryogenic unit included civil, electrical, instrumentation and mechanical, as well as substation construction. Graycor’s team self-performed all equipment setting, steel erection, and piping fabrication and installation. Startup and commissioning was also conducted in the project’s final stage.

Civil Scope:
• Drill caissons: 127
• Foundations: Over 50 varying
• Rebar: 155 tons
• Concrete: 3,500 cubic yards
• Schedule: 1-10-6 for 12 weeks

Piping Installation:
• Piping: 16,278 linear feet
• Fabricated spools: 851
• Field welds: 581

Electrical Scope:
• Grounding
• Duct banks
• MCC building electrical equipment installation
• Substation installation
• Cable tray and conduit
• Heat trace
• Plant alarm
• Instrumentation
• Electrical cable: 276,156 linear feet

Equipment Installation:
• 52 pieces ranging from 10,000 lbs. to 256,000 lbs.

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