The state health department plans to make a compliance check on a complaint about the adequacy of erosion control for the ongoing Boulder Canyon construction project after environmental advocates reported what appeared to be a high level of sediment downstream.

Boulder Waterkeeper filed a complaint Sunday with the Colorado Department of Public Health and Environment after one of its members, fly-fishing guide Wallace Westfeldt, made observations and took photographs showing what they termed “unusually high sediment” downstream from the Colo. 119 improvement project in the area of Eben Fine Park and other locations.

The Colorado Department of Transportation on Friday said in a statement that both that agency and contractor Zak Dirt have been in compliance with the monitoring of stormwater measures and are maintaining vigilance in keeping up with the required installation and maintenance erosion mitigation measures “prior to, during and after any natural event.”

The water quality complaint was leveled against the lead contractor, Longmont-based Zak Dirt, which holds the permit for the $31 million project that includes regular closures of the canyon due to blasting, and will not be completed until summer 2020.

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