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Heber Light & Power Projects

HL&P | RMP Transmission Line Rebuild
Transmission Rebuild and Second Point of Interconnect

In 2014, Heber Light & Power and Rocky Mountain Power began working on the first phase of a multi-year project to rebuild ten miles of transmission line from the Jordanelle Dam to the Midway Substation, and to add a second point of interconnect to the Western Grid. This project will complete a transmission loop between Park City and Orem using Heber Light & Power's existing and future planned transmission and transportation corridors. Part of the project is rebuilding the south transmission line and adding 138 and 46 kilovolt lines to new reinforced poles.

Why does the Heber Valley need this and can we afford it?

This is a critical project for the Heber Valley. For the fifth year in a row, the U.S Census Bureau has listed Wasatch County as one of the top eight fastest growing counties in the nation. It is imperative that infrastructure continues to be replaced and improved to meet the demands of growth. Currently, HL&P receives up to 75 percent of its energy from a single point of interconnect to the Western Grid via the PacifiCorp owned powerline in Provo Canyon. One point of interconnect to the grid cannot continue to sustain growth and puts customers at risk of prolonged outages.

Looking to the Future

In the future, the capacity of the single feed from Provo Canyon will be inadequate to serve energy demands. While infrastructure improvements are necessary to support growth, they are also expensive. The high cost of a multi-year transmission rebuild does not have to be unduly burdensome to our customers. By working jointly with Rocky Mountain Power on this project and sharing poles, HL&P can save over half of what the project would cost if the utility were to complete it alone. Sharing infrastructure also minimizes the number of poles and lines running in and around the valley. HL&P is confident that this joint project will allow us to continue to provide the reliable and affordable electric service that our customers expect and deserve.
Press Release

09/03/2014 - Wasatch Wave



Existing Section of the Jordanelle to Midway
Joint Transmission Line Rebuild

Questions & Answers
Why is HL&P rebuilding this power line?

The existing line is over 25 years old and needs to be rebuilt in order to maintain and improve system reliability. The Heber Valley is growing exponentially and new homes and businesses are creating greater power demands on HL&P's power grid. The upgraded line will improve system capacity and reliabilty by creating redundancy through a second point of interconnect with RMP's power grid.

Why is Rocky Mountain Power part of this project?

Both HL&P and Rocky Mountain Power need this power line rebuilt for separate reasons. HL&P needs a second point of interconnect for capacity, redundancy, reliability and future power load growth. Rocky Mountain Power needs to complete a loop circuit by connecting the Park City line to the Orem line located in Provo Canyon. Working on this project jointly creates synergies and cost savings that benefit both companies and their rate payers. The existing power line is the shortest distance between the Jordanelle line and the Midway substation and it also crosses the HL&P property where the second point of interconnect needs to be located.

Why don't you install this line underground?

Installing a 138kV transmission line underground is a very expensive and intrusive process. The easement corridors need to much wider which makes them more expensive, also the labor and material costs are much higher. On average an underground power line costs between 4 and 7 times more than overhead. It is unfair to transfer those costs on to our rate payers. Overhead power lines are a national standard and HL&P feels it is the only viable solutions with this power line rebuild.

When will construction begin? What is the timeline?

Construction on this line has already begun, there is a one mile section completed on Highway 40 north of Heber. The next phase will begin in 2018 and we plan on finishing the entire project in 2020.

What will the upgraded poles look like? Why did you choose this style of pole?

Show an example of the new poles.

How much will this project cost? How will this project be paid for?

Jason & Ben answer this please.

Population/Load Growth Forecast Chart Here
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Heber Light & Power
31 South 100 West
Heber, UT 84032
Office (435) 654-1581
Outages (435) 654-2913