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Cherokee Pipeline Project

Cherokee Pipeline Project

The pipeline will deliver natural gas so that we can retire coal-fired units

Overview

Xcel Energy is implementing its Colorado Public Utilities Commission-approved Clean Air-Clean Jobs Plan by retiring three of our Cherokee Generating Station’s coal-fired units, adding a new natural gas plant, and switching a fourth unit to run on natural gas. A new pipeline is needed to deliver the natural gas to our Cherokee power plant for this conversion.

We will install 34 miles of new, 24-inch steel, high-pressure natural gas transmission pipeline from a new Fort Lupton natural gas metering facility to the Cherokee Generating Station. Construction on the pipeline begins in early 2014 and has an anticipated in-service date of October 2014. Work will occur in Adams and Weld counties and the cities of Brighton, Commerce City and Fort Lupton.

 

Cherokee Generating Station Repowering Project

Part of our implementation plan for Clean Air-Clean Jobs Act is the early retirement of 365 MW of coal-fired generation at our Cherokee Generating Station and replacing it with 921 MW of natural-gas generated electricity. We have retired Cherokee Unit 1 (May 2012) and Unit 2 (October 2011), and will retire Cherokee Unit 3 (by 2015). All three units operate on coal, and we will install a cleaner, more efficient natural gas plant (569 MW) at the plant site to replace this coal-fired generation We also will switch Cherokee Unit 4 from using coal to natural gas (352 MW).

Overall, we will increase Cherokee’s current generating capacity by 204 MW.

Here’s our anticipated project schedule:

  • Unit 2 (106 MW) was retired in October 2011
  • Unit 1 (107 MW) was retired in May 2012
  • Unit 1 (107 MW) and Unit 2 (106 MW) cooling towers' demolition started May 2012
  • Unit 1 (107 MW) and Unit 2 (106 MW) cooling towers' demolition complete June 2012
  • Unit 2 (107 MW) synchronous condenser in service June 1, 2012
  • Unit 2 (106 MW) baghouse demolition begins June 11, 2012
  • Unit 1 (107 MW) demolition starts October 2012
  • Unit 3 (152 MW) retired by 2015
  • New, 569 MW natural gas combined-cycle generating plant comes online in 2015
  • Unit 4 (352 MW) repowered to natural gas in 2017

On Feb. 22, 2012, the Adams County Board of County Commissioners approved, with conditions, the Areas and Activities of Statewide Interest and Conditional Use Permit Applications, allowing us to continue decommissioning equipment and facilities.

New pump equipment will be installed at the reservoir on the northwest corner of the plant property. This will allow the current make-up water ponds on the southwest corner of the plant property to be drained and then filled in August 2012.

The former pond site will house the new, 569 megawatt (MW) natural-gas combined-cycle power plant. This unit will replace the retired/retiring coal-fired Units 1, 2 and 3.

Demolition and construction activities at the generating station are expected to continue through 2017.

Route Maps

When considering possible routes for the natural gas pipeline these are some of the criteria and considerations we took into account:

  • Areas where we currently have rights of ways (ROW) or utilities easements exist. Using these areas also helps minimize risk of third-party damage to the pipeline.
  • High population areas
  • Wetlands and water use
  • Recreation areas, such as parks
  • Special status species
  • Additional environmental issues

Review our proposed and alternative routes by using the interactive map below. Or use the links to the below to download PDF maps of the proposed route by county or city.

Project Updates

August 6, 2014 - Our closure of the southbound lane of Brighton Road between East 77th Avenue and East 80th Avenue will be in effect through August 13th. We are installing pipeline using open trenching in this area and will shift traffic into the eastern shoulder area. Two-way traffic will be maintained along Brighton Road between East 77th Avenue and East 80th Avenue during construction.

Crews are currently working on installing pipeline using directional boring at several locations in Commerce City including:

•East 72nd Avenue
•Vasquez Boulevard
•East 96th Avenue
 

Brighton Road is currently closed at East 72nd Avenue for our bore equipment. We are re-paving sections of Brighton Road north of East 80th Avenue and will maintain traffic using flaggers at this location. We are also working on connecting pipeline from the main pipeline to the East 64th Avenue and Brighton Boulevard bore and the East 69th Avenue bore. We have a shoulder closure in place along Vasquez Boulevard while we complete the bore in this area.

Northeast of Brighton, we are currently replacing concrete on the I-76 Frontage Road between East 152nd and East 160th avenues.

 July 22, 2014 - Our shoulder closure along the east side of Brighton Road between East 77th Avenue and East 80th Avenue will be in effect through August 9. We request that residents in this area refrain from parking along the east shoulder of this stretch of Brighton Road. Instead, please park vehicles along Hollywood Street, located one block to the east of Brighton Road. Backyards and garages located along the east side of Brighton Road will be inaccessible while we complete work in this area.

We are installing pipeline using directional boring and open trenching in this area and will shift traffic into the eastern shoulder area. Two-way traffic will be maintained along Brighton Road between East 77th Avenue and East 80th Avenue during construction.

Crews are currently working on installing pipeline using directional boring at several locations in Commerce City including:

•East 80th Avenue at Brighton Road
•East 77th Avenue at Brighton Road
•I-270 north of the Colorado Front Range Trail
•York Street at East 64th Avenue
•Brighton Boulevard
•East 69th Avenue
 

We are also working on connecting sections of pipeline together between these bored areas.

Brighton Boulevard is expected to be closed to traffic between East 68th Avenue and East 69th Avenue and between Colorado Boulevard and East 64th Avenue for the month of July as we install pipeline by directional boring and open trenching. Detour signs are posted in this work zone to direct motorists.

Natural Gas Safety

The new natural gas pipeline project will meet and exceed federal and state standards and safety requirements. Safety measures will include extra mainline valves, remotely operated shut-offs, and continuous pipeline monitoring.

During pipeline installation, Xcel Energy will implement a corrosion prevention program to eliminate metal loss during the life of pipeline and to sustain pipe integrity. Before the pipe is lowered into the trench, a third party will x-ray all pipe welds. Before the pipeline is put into service, it also will be inspected internally with state-of-the-art inspection equipment. It also will undergo hydrostatic pressure testing where it will be filled with water and tested at a pressure one and a half times of what it will be operating under with natural gas.

After being put into service, the pipeline will be patrolled on annual, semi-annual, and quarterly intervals. How often a specific section of the pipeline will be patrolled will be based on its location and population density. The pipeline’s entire structural integrity will be inspected at least every seven years with in-line inspection tools.

Please visit this link for more information about natural gas safety.

Learn more about Xcel Energy’s natural gas pipeline integrity management programs  and  how we use natural gas to produce electricity. Watch the video.

For comments, questions and concerns contact:

info(at)xcelenergycherokeepipeline.com
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