Water Lines: Hydropower kicks off at nearby Ridgway Dam | PostIndependent.com

Water Lines: Hydropower kicks off at nearby Ridgway Dam

Hannah Holm
WATER LINES
Free Press Weekly Columnist

When Ridgway Dam was constructed on the Uncompahgre River back in the 1970s and 1980s, hydropower was anticipated to be one of its uses — along with providing irrigation water, drinking water and flood control.

Mike Berry, general manager of Tri-County Water (company operating the dam), continues to look for opportunities to start generating hydropower since 2002.

It wasn’t until this month, however, this vision was finally realized.

In June, Tri-County Water officially commissioned a new eight-megawatt generating station powered by water flowing through the dam.

Finding a customer to buy the power at the right price was the key allowing the project to go forward.

The $18 million project is financed through the City of Aspen. The agreement includes payment of a premium for the power generated by Ridgeway Dam for a few years of the 20-year contract in exchange for better rates later.

Tri-County will also sell power to Tri-State Generation & Transmission and the Town of Telluride.

The power generated by Ridgway Dam will vary seasonally, with peak generation coinciding with large summer releases of water to downstream irrigators. The Grand Junction Sentinel reported last week the plant will produce a total of about 24,000 megawatt hours of electricity in an average year — enough to supply 2,500 average homes and eliminate 50 million pounds of carbon dioxide emissions.

The Ridgway Dam generating station was commissioned just one year after the completion of a 7.5-megawatt power generation project on the South Canal — carrying water from the Gunnison Tunnel near Montrose to the irrigators of the Uncompahgre Valley.

Both the Ridgway Dam and South Canal projects avoid the opposition previous hydropower projects faced because it’s installed on existing infrastructure and harvesting power from the regular operations of the facilities. As a result, irrigation deliveries are uninterrupted and no additional disruptions to river flows.

Interest in retrofitting existing water infrastructure to add power generation capability has surged in recent years. Both the State of Colorado and the federal government have made moves to support the trend with new laws to streamline the permitting process.

Finding customers for the power generated at affordable prices for construction is one of the key challenges faced by those interested in developing such facilities. Low prices for natural gas and the irregular supplies generated by such projects are complicating factors in working out power purchase agreements.

On the other side of the equation, renewable energy standards passed by Colorado and other states have created new opportunities.

This is part of a series of articles coordinated by the Water Center at Colorado Mesa University in cooperation with the Colorado and Gunnison Basin Roundtables to raise awareness about water needs, uses and policies in our region. To learn more about the basin roundtables and statewide water planning, and to let the roundtables know what you think, go to http://www.coloradomesa.edu/WaterCenter. You can also find the Water Center on Facebook at Facebook.com/WaterCenter.CMU or Twitter at Twitter.com/WaterCenterCMU.


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