Gregory Canyon Creek Flood Mitigation
Flood Mitigation Plan
The city's Flood Mitigation Plan for Gregory Canyon Creek includes habitat improvements, culvert and channel improvements, a pedestrian bridge at Pennsylvania Avenue, sediment traps, roadway improvements and other features. The Flood Mitigation Plan was accepted by City Council in December 2015 and is available via the links on the right side of this page. Capital improvements funds were allocated in 2018 for the design of culvert and channel improvements from Arapahoe Ave. to Pennsylvania Ave.
Latest News and Updates
The City of Boulder is moving forward with the design of flood mitigation improvements for Gregory Canyon Creek between Arapahoe Ave. and Pennsylvania Ave. The city has partnered with the Mile High Flood District (formerly known as the Urban Drainage and Flood Control District), and selected Jacobs Engineering for the preliminary design of channel and culvert improvements.
In order to perform the preliminary design, surveying and geotechnical (soils) investigation work was conducted in the summer and fall of 2019. We contacted property owners along the creek corridor for Right-of Entry for areas where the city does not have easements - thank you to everyone who has helped us with this important work! We have also met with property owners along the creek to discuss the project and design preferences.
As part of the flood mitigation project, the city has purchased the property at 712 Pleasant and is planning to deconstruct the structure in the winter of 2019.
In 2017, the City of Boulder completed the construction of a private access bridge to the historic Highland School property. The bridge replaced a 4-foot diameter culvert, increasing the capacity from less than 10 cubic feet per second (CFS) to over 800 CFS.
The property at 744 University was purchased to help accommodate flood mitigation improvements and remove a structure from the high hazard flood zone, the most dangerous area of the floodplain. The 100-year-old house structure was preserved and moved to Old Town Lafayette on December 21, 2018.