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Natural gas crews relocate, expand gas pipeline on Idaho Highway 95   

Tags: Avista Utilities, Infrastructure upgrades, Natural Gas, Idaho, Rates, Safety

Natural gas slideshow

Crews brave the cold to bring reliable service to you in $1.4 million project

Post by Dan Kolbet
If you’ve traveled along Highway 95 in North Idaho by Silverwood recently, you may have seen Avista natural gas crews working alongside the busy highway. We wanted to let you know what they are up to. Our crews are relocating and increasing capacity for six miles of natural gas pipeline to accommodate a newly constructed highway.

The Idaho Department of Transportation is reconstructing a portion of Highway 95 from approximately Chilco to Athol.  The highway will expand from two to four lanes, which is great for safety and traffic, but means Avista’s existing 3-inch natural gas pipeline needs to move to a new right-of-way on the east side of the road.

Avista is expanding the capacity of the pipeline from 3 to 6 inches too. Expanded capacity helps serve existing customer needs and helps prepare our infrastructure for the future. The estimated cost for this project is around $1.4 million. Part of our requests for customer rate adjustments typically includes infrastructure work like this project.

You can see from the slideshow of pictures that the crews are clearing a pathway, laying down 40-foot lengths of yellow plastic pipe, fusing them together and then burying the pipeline with sandy soil. The sandy soil protects the pipeline from being touched rocks or hard objects that could put pressure on the new pipeline. After the line is in place it will be pressure tested before being brought into service.

The project started in mid-December and should be completed by mid-March. One of the biggest hurdles the crews had to overcome recently was frost. At times crews had to dig through 12 to 24 inches of frozen ground to make a trench that goes much deeper. Typically large projects like this aren’t completed during winter months, but Avista and other utilities agreed to do the work now to accommodate the Idaho Department of Transportation’s aggressive schedule. Luckily snow hasn’t been an issue yet, but if it does, our crews will work through that too.

Checkout other Avista Blog post about Natural Gas.
Posted by  System Account  on  1/6/2012
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