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.
Environmental Restoration responded to the spill and managed all aspects of the clean up. ER was able to recover approximately 2,000 gallons of gasoline, which was later disposed of. Crews excavated and shipped 0ver 1,200 tons of contaminated soil and shipped 16,500 gallons of contaminated water. Restoration was completed, with import soils, seeding, rip rap and erosion control measures.