Marshfield Utilities

USDI provided the design and inspection for our gas transmission line construction project. We were very pleased with the work that they did. It was completed in a very professional manner and within budget. As a result, we have continued to use their services for on-going inspections maintenance, and OQ training.

— Bob Trussoni, Electric, Communications and Natural Gas Manager

Project Overview

This community utility turned to USDI for help with construction of a 1.5-mile-long transmission pipeline. Prior to start-up, we put together operator qualification and integrity management plans, along with an operations, maintenance and emergency manual. After construction wrapped up in 2010, we took on the operator of record role. Today, we provide ongoing inspections and maintenance—ensuring compliance with federal and state regulations.


Runs between the ANR Pipeline in Wood County & the Marshfield Utilities Combustion Turbine Plant in Marshfield, Wisconsin

Key pipeline stats

  • 8” diameter, epoxy-coated steel
  • Maximum allowable operating pressure of 973 psig
  • Pressure reduction & overpressure protection facilities
  • Odorization at start
  • Line heater
  • Cathodic protection system: magnesium anodes

Ongoing USDI services

  • Leak & cathodic protection surveys
  • Solid state device inspection & testing
  • Key component inspection & maintenance
  • Odorization intensity checks & equipment maintenance
  • Pipeline patrols & continuing surveillance
  • Emergency response
  • Annual report submissions & document upkeep
  • Participation at state safety & field audits