Apple Valley Tanker Rollover

Site Contact:
Joyel Dhieux
On-Scene Coordinator


Site Location:
HWY 36
Lyons, CO 80540

At approximately 12:01 pm on April 27, 2021, a tanker truck carrying 8,500 gallons of gasoline was involved in a rollover accident on Highway 36 (near Mile Marker 18) northwest of Lyons, Boulder County, Colorado. The tanker spilled an estimated 1,000 – 1,600 gallons of gasoline at the site.  The spilled fuel traveled west along a drainage ditch and into a culvert that discharges to the North Saint Vrain Creek. It is unknown how much of this release entered the creek. A fish kill was also observed in North St. Vrain Creek downstream of the spill site, as a result of the release. 

EPA, Boulder County Public Health, and LMH Environmental, a consultant for the insurance company, understand that residents are concerned about their water wells.  If you have concerns, please contact LMH at

Colorado Parks and Wildlife is assessing the fish kill and other wildlife issues as they arise.   Please contact Colorado Parks and Wildlife at with any photos or videos of dead fish, or if you collected and saved dead fish.

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