Priorities

The first priority for City plows are the primary routes: the major arterial streets such as Colorado Boulevard, Washington, 104th, 120th, 136th. Next to be plowed are the secondary routes which include local collector streets, school zones, and fire station zones.

See Map of Primary and Secondary Routes

The last to be plowed are the residential streets. Residential streets are only plowed after major snowstorms such as the blizzard of December 2006.

During a Storm

In a Class I or Class II storm, City crews will plow only selected streets identified as Primary and Secondary routes. Primary and Secondary routes make up 217 miles of Thornton's street system. In a Class I storm, Primary routes are treated within three hours of the snow beginning to accumulate on roadways. Secondary routes will be cleared of snow and ice after the primary routes are completed.

During Class II and Class III storms, snowfall may be so heavy that only Primary routes can be maintained in a passable condition until the storm abates. When Primary routes are clear, then Secondary and Residential routes are plowed. Residential streets are only plowed during Class III storms.

More Info

For information about the Snow and Ice Control Program, please call (720) 977-6200 or email Infrastructure.