West Union, West Virginia

Sherwood VIII Cryogenic Plant

Client / Owner

MarkWest / Antero Midstream Partners LP

Architect / Engineer

Exterran Partners LP


Oil, Gas & Chemicals


Graycor Industrial

Project Scope

Graycor Industrial constructed an eighth cryogenic plant to join MarkWest Energy Partners’ Sherwood Processing Facility where Graycor also built Sherwood VII, a 200-MMscf/d cryogenic gas processing plant.

The scope of work to build Sherwood VIII’s 200-MMscf/d cryogenic unit included civil, electrical, instrumentation and mechanical, as well as construction of two substations (a mini and a large to support Units 8 and 9). Graycor’s team self-performed civil work, equipment setting, steel erection, and piping fabrication and installation. Startup and commissioning were also included in the project’s work scope.

As part of a third project performed at the Sherwood complex, Graycor’s team supplied and installed an interconnecting inlet pipe rack and associated piping, tying together MarkWest’s pipeline and existing cryogenic units on the site.
Civil Scope:

  • Drill caissons: 127
  • Foundations: Over 50 varying
  • Rebar: 155 tons
  • Concrete: 3,500 cubic yards
  • Schedule: 1-10-6 for 24 weeks

Electrical Installation:

  • 64 pieces ranging from 10,000 lbs. to 256,000 lbs.

Piping Installation:

  • Piping: 17,487 linear feet
  • Fabricated spools: 851
  • Field welds: 581

Electrical Scope:

  • Grounding
  • Duct banks
  • MCC building to house MCCs for Units 8 and 9
  • Substation installation
  • Cable tray and conduit
  • Heat trace
  • Plant alarm
  • Instrumentation
  • Electrical cable: 276,156 linear feet

Sherwood VIII Inlet Pipe Rack Project

West Union, West Virginia

Sherwood VII Cryogenic Plant

West Union, West Virginia

Majorsville VI Cryogenic Facility

Dallas, West Virginia