From The Pueblo Chieftain (Chris Woodka):
The Pueblo Board of Water Works Tuesday approved two contracts with Colorado Mountain College to improve storage and collection facilities in the high country.
A $50,000 contract to take a bathymetric survey of Clear Creek Reservoir and an $85,000 payment over 10 years for a fen research project near Leadville were approved.
The bathymetric survey — basically underwater topography — will serve two purposes, said Steve Anselmo, water resources engineer. It will update the storage capacity of the reservoir by identifying areas that have silted in, and identify any sinkholes that could contribute to seepage paths into the dam’s foundation.
The study would be conducted in conjunction with the U.S. Geological Survey.
The last time the lake bed was surveyed was in 2007, when the reservoir was drained in order to repair the outlet works.
Pueblo Water has been participating in the fen research project since 2005, along with the Army Corps of Engineers, U.S. Fish and Wildlife Service, EPA and Colorado Mountain College. The purpose is to see if a fen can be relocated, said Alan Ward, water resources manager.
Fens are wetlands with certain soil characteristics that take thousands of years to develop.
The presence of fens was the major obstacle Pueblo Water faced when it determined that it was not feasible to build a reservoir at Tennessee Creek. Aurora also faces the challenge at its proposed Box Creek Reservoir in Lake County.
While relocation of fens is not realistic for Tennessee Creek because of the large number that are present, the research could help Pueblo Water in future projects, Ward said. That could include its Tennessee Creek Ranch as a receiving site for transplanted fens.
Pueblo’s payment of $85,000 would go toward a total project cost of $580,000. Aurora would pay $300,000 and Denver Water $150,000.