From the Greeley Gazette (Mike Bauman):
Ken Kehmeier, [CDOW] senior aquatic biologist for the Platte River Basin, told commissioners that Denver Water’s Moffat Firming project would result in reduced stream flows and increased temperatures in the Williams Fork, Fraser and Upper Colorado River systems. According to Kehmeier, the lower flows would increase sedimentation in the affected reaches of these rivers and reduce their ability to support aquatic insects and fish life.
On the East Slope, the additional diversions would send more water through the Moffat Tunnel, down South Boulder Creek and into an enlarged Gross Reservoir in Boulder County, Kehmeier said. The project would create a larger reservoir for recreation, however, longer periods of high flows in South Boulder Creek above Gross Reservoir would reduce its ability to support trout and other aquatic wildlife, he said…
Kehmeier noted that Denver Water could opt to divert an additional 16,000 acre feet, mainly through Roberts Tunnel and South Platte basin through the southern part of its system without getting a new federal permit. That would likely cause significant impacts to Dillon Reservoir and the high-value trout fishery along the South Platte River, Kehmeier said, and it would not give the Wildlife Commission an opportunity to negotiate mitigation for the increased diversions.
More Moffat Collection System Project coverage here and here.