Project Included

30-Mile 138kv New Build/69kV Transmission Line Rebuild — Virginia & Maryland

2017–2018

Riggs Distler rebuilt 30.9 miles of 138/69kV transmission line over five different outage windows in 2017–18 to deliver improved electric infrastructure to the customers of our host utility. The project involved:

  • Replacing 451 wood poles with steel monopoles on foundations or vibratory caissons
  • Upgrading the transmission line from one to two circuits
  • Installing six new conductors
  • Installing two new OPGW lines
  • Installing, maintaining and removing erosion and sediment controls
  • Managing civil contractors installing 451 foundations

Challenges Overcome

Work began after one of the rainiest seasons on record, and many sections of the project area were inundated with water. Our environmental matting team laid the mats necessary to create a stable and safe working environment, and ended up using more matting than anticipated to secure flooded areas. In areas where matting was not possible, Riggs Distler coordinated helicopter long lining to raise the new transmission wire. Despite the difficult working conditions and an accelerated work schedule, our team carefully managed environmental compliance and completed all work within tight outage phases to deliver the project on schedule and on budget.

Results Delivered

Ultimately, our work delivered redundancy in the power supply and a more capable and reliable electric grid for the customers of our host utility without noticeably interrupting their service. Riggs Distler worked safely and efficiently to meet every project deadline and improve power services in these areas of Virginia and Maryland.

Project Included

Case Studies

15-Mile 69kV Transmission Line Rebuild—Southern New Jersey
2021
Riggs Distler was contracted to modernize and upgrade the performance of a major electric transmission line connecting two substations in southern...
COC for Overhead Transmission Projects—DE, PA, NJ, MD, IL
January 2021–December 2025
Riggs Distler is the Contractor of Choice for all installation, maintenance, and repair work performed on our client’s electrical transmission...
115kV Transmission Line Rebuild—New Hampshire
May–June 2020
Riggs Distler was contracted to upgrade aging tower infrastructure along an important 115kV electrical transmission line in New Hampshire. In order...
Great Egg Harbor Crossing Rebuild Project—New Jersey
September–December 2020
Riggs Distler was contracted to assemble and install eight electric transmission towers to provide improved electrical service to customers in...
K43 Fiber Project - Vermont
January-June 2020
Riggs Distler was contracted to install 21 miles of new ADDS fiber-optic cable and support braces on a 115kV transmission line stretching from...
Switching Station Spare Transformer — New Jersey
February–May, 2020
February–May...
24-Mile 138kV Transmission Line Rebuild — Monee, Illinois
January 2016-January 2017
Our host utility needed to replace an aging 138kv transmission line stretching 24 miles across northeastern Illinois. Working under a tight, ...
Hurricanes Katrina, Rita and Wilma Emergency Power Restoration — Louisiana, Alabama, Florida, Mississippi
August-December 2005
In 2005, Riggs Distler was hired to help restore power to areas affected by the devastating Hurricanes Katrina, Rita, and Wilma. It’s estimated...
Hurricane Sandy Emergency Power Restoration — New Jersey
November 2012
As Hurricane Sandy’s landfall along the mid-Atlantic coast became imminent, Riggs Distler immediately set to work preparing vehicles, equipment,...
Post-Hurricane Power Restoration — Puerto Rico
2017–2018
After multiple Category 3+ hurricanes decimated the Puerto Rico Electric Power Authority grid in 2017, Riggs Distler quickly mobilized to help...
13kV & 23kV Circuit Refurbishment — Massachusetts
2015–2018
Riggs Distler was contracted to reconductor approximately 20 miles of 13kV and 23kV circuits and replace over 500 wooden utility poles for an...
Susquehanna River Transmission Line Crossing — Pennsylvania
2017
Riggs Distler completed this difficult reconductoring project for a transmission line spanning the Susquehanna River. The 1.1-mile river crossing is...
30-Mile 138kv New Build/69kV Transmission Line Rebuild — Virginia & Maryland
2017–2018
Riggs Distler rebuilt 30.9 miles of 138/69kV transmission line over five different outage windows in 2017–18 to deliver improved electric...
41-Mile 230kV/138kV Transmission Line Rebuild — New Jersey
November 2017–May 2019
Riggs Distler was selected as the general contractor on this important transmission line rebuild. Project will deliver a more capable and reliable...