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Iroquois Maintenance Schedule and Activities

In the event that Iroquois schedules a maintenance activity that may cause noise or odor to be detectable by residents within close proximity of the pipeline, notice of such will be provided here.


Pipeline Maintenance Activities planned in Newtown and Monroe, CT ­- September 1 through November 23, 2016

As part of its commitment to continuously improve its integrity monitoring program, Iroquois will be installing launcher and receiver facilities on its 1.5 mile loop line that parallels its mainline between Stone Bridge Trail and Canterbury Road in Newtown, CT. These facilities, to be installed at our existing valve sites at the end of Canterbury Road and the end of Stone Bridge Trail, will allow Iroquois to internally inspect this line using a sophisticated tool known in the industry as a “smart pig.” These inspections are done periodically to detect metal loss, dents or deformation from outside sources, allowing remedial action to be taken when and if necessary.

The project is expected to begin on September 1 and be completed by November 23, 2016.  Work will include related activities such as mobilization of equipment at both sites, site preparation, excavation, installation and restoration.

On Saturday, September 17th, Iroquois’ mainline was vented of natural gas to allow a Main Line Valve to be installed at the Canterbury Road location. The valve installation was completed on the same day and the main line was placed back in service. Work activities have since continued on the loop line.

On Thursday, October 13 and Friday, October 14, work is planned to install the launcher and receiver facilities on the loop line. To complete this work, Iroquois technicians will use air movers at both the Stone Bridge Trail and Canterbury Road sites to remove any residual gas that may be present in the loop line.

We expect the noise to be very minor; however, there will be some gas odor emitting for possibly 30 minutes each day at approximately 8:30 am. This odor may be detectable by those in close proximity to the sites. The air movers will remain running to ensure there is no gas in the line while work is being done. These activities are expected to end by 5:00 PM each day.

On Thursday, November 17th , the loop line will be purged of air at the Stone Bridge Trail site and the line will be restored to service.

Schedule for Venting/Purging Activities*





Wednesday Sept. 7

9:00 AM

Stone Bridge Trail only






Saturday, Sept. 17

9:00 AM

Walnut Tree Hill Road, Newtown

Canterbury Road, Newtown

Stone Bridge Trail, Newtown

Whispering Pine Road, Monroe






Saturday, Sept. 17

10:00 PM

Whispering Pine Road only




Thursday and Friday

October 13 and 14

8:30 AM


Canterbury Road and

Stone Bridge Trail

Air movers will used to remove residual gas from loop line.





Thursday, Nov 17

1:00-3:00 PM

Stone Bridge Trail only

Purge and Restore Service to Loop Line

*Times/dates are subject to change. Updated information will be made available on this web page.

If you have any questions regarding this work, please call Iroquois’ non-emergency hotline at 1-800-253-5152. If you have a safety concern during the vent activities, please call Iroquois’ Gas Control Center at 1-800-888-3982.

Current as of 11/16/2016

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