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Wonderland Creek UDFCD Maintenance East of Foothills


In early 2016 the City of Boulder began construction of a large flood mitigation Capital Improvement Program project west of Foothills Parkway. When completed and approved by FEMA, 130 structures and 583 dwelling units will no longer be in the 100-year floodplain. Currently, the Boulder and White Rock Irrigation Ditch intercepts creek flows from Wonderland Creek, resulting in downstream flooding in the King's Ridge neighborhood during major storm events (the ditch overtopped in 2013 causing extensive flooding in the King's Ridge neighborhood.) This project will separate the creek flows from the adjacent irrigation ditch therefore eliminating the current flood risk.

During the design of the Wonderland Creek Flood Mitigation Project, it was necessary to analyze the downstream segment of the creek to ensure adequate capacity is available once the water is no longer being diverted into the irrigation ditch. The analysis indicates that the creek capacity from 47th Street to Kings Ridge Boulevard is restricted due to dense vegetation, resulting in an elevated flood risk for the neighborhood.

The goal of this maintenance project is to reestablish necessary channel capacity, while at the same time limiting channel disturbance and tree removal. The intent of this project is to save to the extent possible, the larger trees while focusing removal efforts on the smaller woody vegetation and hazardous trees which are causing blockage. The Urban Drainage and Flood Control District (UDFCD) is taking the lead on this maintenance effort.

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Thank you to all who were able to attend the public meeting on Wednesday, 21 Sept. Work will begin on the 1st of November and take approximately 3-4 weeks to complete.

This maintenance project is designed, funded and contracted through UDFCD, with the City of Boulder as a member of the district. Part of UDFCD's mandate is to maintain flood flow conditions and capacity in channels within the district. View UDFCD projects and maintenance work plan. The maintenance work in this area is scheduled for completion by the end of 2016.


Dave Skuodas
Project Manager
Urban Drainage and Flood Control District

Laurel Olsen-Horen
Flood and Greenways Specialist
City of Boulder | Public Works Department
[email protected]