Denver Water upgrading 50-year-old dam infrastructure
Dillon Dam outlet works project mobilizes this summer
DILLON, Colo. — July 1, 2014 — Beginning July 7, and ending in early 2015, Denver Water will be upgrading Dillon Dam’s outlet works facility, which houses the system that controls the flow of water from Dillon Reservoir into the Blue River. The facility’s gates are more than 50 years old and need maintenance due to normal wear and tear. The focus of the work is to restore the gates to near original condition.
“We don’t expect this project to have much of an impact on traffic in the area, or on recreational users of the reservoir and the river,” said Jeff Archer, project engineer. “We’re working closely with county officials, as well as Colorado Parks and Wildlife. Fishing on the reservoir and the Blue River will remain available during the project.”
A Denver Water contractor will carry out the work. The majority of the construction will take place inside the fenced-in area near the Morning Glory spillway toward the Frisco side of the dam road. During construction, the contractor will occasionally be moving heavy equipment — such as cranes, loaders, excavators and trucks — around the dam area. Daily construction traffic should not impact traffic around Dillon Reservoir; however, there may be limited traffic impacts when the contractor transports large equipment at the beginning and end of construction.
In order to work on the gates, the contractor will reroute the normal flow of water around the construction in the outlet works using a bypass system that will redirect water into the Blue River while the gates are out of service. While construction activities are slated to begin in July, the bypass system likely will operate from August through December. The flows in the Blue River are expected to correspond with average flows for that time of year. In addition, a barge with a crane will be placed on the reservoir within the buoy lines near the spillway as part of the bypass system for a week in the fall. The barge will not interfere with normal activities on the reservoir.
This $3.4 million project was previously announced in 2012, but was postponed due to drought conditions, which made the project not feasible because of the bypass system needed to carry out the work.