Click the link to read the article on the Aspen Daily News website (Austin Corona). Here’s an excerpt:
July 17, 2024
Ongoing construction at the Grizzly Reservoir turned the Roaring Fork River orange as it ran through Aspen on Tuesday. The discoloration had remained in the upper valley as of Tuesday afternoon, with some cloudiness visible as far downstream as Woody Creek. The river appeared clear at Old Snowmass. The city of Aspen said in a Facebook post that its municipal drinking water is safe to drink. Aspen takes its drinking water from Castle and Maroon creeks, not the Roaring Fork. The only drinking water intake located directly on the Roaring Fork is in Glenwood Springs. Nonetheless, county officials have warned recreators to be cautious when playing in the river and avoid ingesting river water. The county also warned against allowing pets in the river. A county alert on Tuesday said the river could appear muddy and discolored over the next few days. Sediment from Grizzly Reservoir likely contains high loads of copper, aluminum, iron and other minerals. The reservoir is located on Lincoln Creek, where the Environmental Protection Agency discovered high metals contamination in 2023 (the contamination was found to be naturally occurring). After leaving Grizzly, the creek flows into the Roaring Fork River roughly 10 miles upstream of Aspen.
Ordway, Colorado-based Twin Lakes Reservoir and Canal Company, which maintains and operates Grizzly, is installing a liner on the reservoir dam this summer. The company is draining the reservoir as part of the project, which has apparently allowed sediment from the bottom of the reservoir to flow downstream in Lincoln Creek…Twin Lakes Reservoir and Canal began draining the reservoir in late June, sending the drainage water through a tunnel under the continental divide. Toward the end of the process, the water level dropped below the tunnel’s intake, causing project managers to send the remaining reservoir contents down Lincoln Creek.
