Fish Kill due to Boulder Canyon Hazmat Spill on May 1st

On May 1, 2018 there was a hazardous material spill of 250 gallons of sodium hydroxide or caustic soda in upper Boulder Canyon near mile marker 28.5.  The materials were being delivered to the Nederland Water Treatment plant an one container fell off the truck onto the road shoulder.  Authorities were notified by 9:30am arrived at the scene at 10:51am.  By then all the materials had leaked from the container.  In the following days and week fishing guides observed multiple dead and dying fish and populations do not appear to have recovered to pre-spill levels.  The community response was limited and Boulder Waterkeeper believes that additional procedures are necessary to prevent and address future contamination events.

A full report on the incident can be read at:

Contact Wallace Westfeldt ( for additional information.

Daily Camera:

Mountain Ear: