Aspen CO, 7/1/2024 – The upcoming rehabilitation project for the Grizzly Reservoir is scheduled to begin this week with construction equipment mobilizing to the worksite. This extensive project, led by the contractor Twin Lakes, involves multiple phases aimed at enhancing the reservoir's infrastructure and water quality. Twin Lakes begun mobilization in mid-June, with key phases of the project unfolding as follows:
Reservoir Drawdown: Occurred from mid-June to early July, the reservoir drawdown marked the start of the project. This phase includes moving back lake sediment, which will occur concurrently with the dewatering process to ensure efficiency and environmental protection.
Lining Installation: Work begins July 8 through late September, installing a new lining will improve the reservoir's integrity and functionality.
Outlet Work: Planned from mid-July to mid-August, this phase will involve significant updates to the reservoir's outlet structures.
Tunnel Gate Replacement and Rehabilitation: From mid-August to mid-September, the tunnel gate will be replaced, and comprehensive tunnel rehabilitation will be conducted.
Project Completion: The entire project is expected to be completed by mid-October, weather and conditions permitting.
Throughout the project, special attention will be given to maintaining water quality through Lincoln Creek and the Roaring Fork River, efforts will be made to release water slowly to minimize sediment disruption. Additionally, straw bales will be strategically placed to intercept sediment and prevent it from moving downstream.
The public should be aware that during the drawdown, there may be temporary discoloration of the Roaring Fork River and Lincoln Creek. This discoloration is a known and expected result of the drawdown process and poses no long-term risk to water quality. Naturally occurring metals that exist in Lincoln Creek may also be transferred with the sediment. The project will have temporary impacts on dispersed camping and access along Lincoln Gulch Road. Campers and visitors are advised to stay informed about road conditions and project progress. Signage will also be installed up Lincoln Creek Road to inform travelers of traffic impacts.
This rehabilitation effort is crucial to maintaining the reservoir's structural integrity and the environmental health of the Grizzly Reservoir, Lincoln Creek, and the Roaring Fork River. For more information please visit pitkincounty.com/1616/Grizzly-Reservoir-Rehabilitation or contact Pitkin County Environmental Health Manager Kurt Dahl kurt.dahl@pitkincounty.com.
Resources:
Lincoln Creek public flyer 6-24-24.docx