Transco Pipeline Hydrostatic Testing

 Hydrostatic Testing

Hydrostatic pressure testing is one of several methods Williams uses to reconfirm the structural integrity and safety of its natural gas pipeline. Hydrostatic testing involves removing the natural gas from the line, then filling a pipeline segment with water until it is at a pressure that is higher than the pipeline will ever operate with natural gas. This allows Williams to validate the safe operating pressure of the pipeline and ensure that the line is structurally sound.

To learn more about the process, click here.


This summer Williams will be performing hydrostatic testing of various segments of its Transco pipeline in Maryland.


Status: Pending

Beginning South of Sparks Road and ending at Troyer Road.

  • Test Start: TBD
  • Test End: TBD


Status: Pending

Test begins at Troyer Road and extends to Houcks Road.

  • Test Start: TBD
  • Test End: TBD

Status: Pending

Test begins at Houcks Road and extends to Nodleigh Terrace.

  • Test Start: July 24, 2017
  • Test End: July 25, 2017



Status: In Progress

Test begins at Nedleigh Terrace and extends to Mt. Hoerb Road.

  • Test Start: July 21, 2017
  • Test End: July 22, 2017

Status: Complete

Test begins at Mt. Horeb Road and extends to Deer Creek

  • Test Start: July 20, 2017
  • Test End: July 21, 2017



Each test is expected to last about 15 hours. The pipeline pressure is continuously monitored for the duration of the test. You may also see Williams and/or contract personnel patrolling the pipeline right of way during the testing process.


Safety Precautions

Out of an abundance of caution, Williams is requesting for the general public to remain clear of the pipeline right of way when possible during the testing period. You may notice signage in the vicinity of the test warning pedestrians to remain clear of the pipeline right of way while the test is underway. In the event a problem occurs during a hydrostatic test, we will have personnel standing by to respond. Once the hydrostatic test is complete, the signage will be removed. Test water will be disposed of properly and the line will be returned to service.



Thank you in advance for your cooperation and patience as we perform this necessary maintenance. Should you have any questions, you may contact the following:

  • Land Agent Jim Hutchins: (434) 282-4155
  • Operations Manager Tim Rich: (410) 465-7459
  • Construction Chief Shelton Bankston: (318) 558-5661