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  • Floodplain Map
  • Creeks of Boulder
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Wonderland Creek

Wonderland Creek

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Wonderland Creek begins at Wonderland Lake in north Boulder and has a tributary watershed area of approximately two square miles. The creek flows southeast through the city to its confluence with Goose Creek near Pearl St. The creek flows primarily through residential development.  

Wonderland Creek Projects

NOTICE 

Beginning the week of July 6, contractors will be in the area of the project conducting repairs to damaged concrete. To facilitate this work, portions of the multi-use path will be closed and detours will be in place. This work will be completed around July 17. Thank you for your patience. 

Check out the video presented at the 2019 Colorado Association of Stormwater and Floodplain Manager's annual conference

Wonderland Creek project construction began in January 2016 and was completed in April 2019. The project extends from Foothills Parkway in the south to Winding Trail Drive in the north. The purpose of this approximately $30M project (cost includes design and construction) is to provide channel improvements for this segment of the creek to contain the flows associated with the 1% annual chance flood (aka 100-year floodplain). By creating these improvements, the city will be reducing the flood risk to numerous structures and dwelling units that are currently located within the 1% annual chance special flood hazard area floodplain. In addition, we will be building three new underpasses (1. at the BNSF Railroad 2. Kalmia Ave. 3. 28th St.) to provide safe passage for pedestrians and cyclists as we extend the multi-use path system from Foothills Parkway to 30th St. In order to create these new features, approximately 450 trees have been removed along the project reach. 1,884 new trees and shrubs were replanted. 

Current Remapping Process

The city has completed the Letter of Map Revision (LOMR) comments and anticipates submitting the LOMR to FEMA in mid-May 2020. The city cannot anticipate how long the LOMR will take for FEMA review (on average, remapping can take approximately 9-18 months to complete) Once the city receives notification from FEMA on the approval of the revised mapping, the city will send out letter notifications to all properties in the Special Flood Hazard Area to inform community members of the new affective date of the revised Flood Insurance Rate Map.

Additional Project Resources

The City of Boulder's Department of Public Works - Transportation is currently in the design phase for improvements to 19th Street. Modifications to the Wonderland Creek culvert at 19th Street will be incorporated into this transportation project to assist with future flood mitigation efforts along Wonderland Creek.  

 

Wonderland Creek Mapping and Mitigation Information

The City of Boulder finalized the Fourmile Canyon Creek and Wonderland Creek Major Drainageway Plan pdf in 2011.