Integrity Services

Anomaly Digs

Williams NW Pipeline - Goldendale to Willard H.P. Anomaly Digs.

  • Services Performed
    • Anomaly Investigation & Repair
    • Permawrap, Petro-Sleeve, Recoat
    • Pipe Replacement
    • Cleanup Seeding & Reclamation
  • Client
    • Willams Northwest Pipeline
  • YEAR
    • 2020
      • Klickitat & Skamania Counties, WA
    • 5 months
    • Natural Gas


About the Project

Perform 62 anomaly digs on an existing 26” pipeline in steep slope terrain typically greater than 30 degrees. In addition, replaced approximately 855 LF of existing 26” pipeline on 34-degree slope. Required winching of equipment up and down the steep slopes.


The original scope was to perform approximately 32 anomaly digs. Another 30 anomaly digs and pipe replacement added by Company after the project start. The objective was to repair the pipe to Williams's requirements so that line will stay in a safe operating condition.

Unique Problems Solved

  • Steep Slopes and Remote Locations

    Most of the digs were located in remote areas making communication extremely important. All crews were supplied with two-way communication equipment, hands-free headsets for operators on slopes, and satellite phones. All dig locations were measured out, and the appropriate number of winch cable slings were used.

  • Equipment

    Steep slope areas in loose, rocky soils required winches, cables, equipment with single bar grousers. Specialized crew carriers were utilized to move the crews up and down the slopes.

  • Fire Season & Hoot Owls

    Project located in the environmentally sensitive and scenic Columbia River Gorge area. Worked with DNR throughout the project to mitigate work activities due to high fire risk. Altering our work schedule and providing additional fire safety equipment

  • Falling Rocks and Loose Dirt

    Rock shields were placed up-slope of our crew's work area and one individual was placed as a lookout in case of falling debris.

Project leadership team

Sr Project Manager


Sr Cost Controller