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Flood Mitigation Project
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Coal Creek Flood Mitigation Project

Last Updated: January 4, 2013

All construction is complete. FEMA has approved the updated flood maps. They are effective February 4, 2013. Final project closeout is underway.

This project is the first regional project identified in the adopted Boxelder Creek Regional Stormwater Master Plan. The project was designed and constructed by Larimer County on behalf of the Boxelder Stormwater Authority and reduces the potential for future flooding downstream of the North Poudre Inlet Canal by diverting floodwaters from Coal Creek through Clark Reservoir. Once the new floodplain maps become effective (estimated February, 2013) the need for flood insurance for more than one hundred properties will be eliminated. The results of the project also avoids cleanup costs, limited resident displacement and prevents the loss of public services.

The project components included:

  • Enlarging The North Poudre Inlet Canal From The Railroad to Clark Reservoir
  • New County Road 7 Bridge Over Inlet Canal
  • Improvements to Clark Reservoir
    • Emergency Spillway
    • Adding Capacity to Reservoir to Hold Floodwaters

    Project Funding

    The total project cost was about $5 million dollars. Larimer County received a national PDM (Pre-Disaster Mitigation) Grant from the Federal Emergency Management Agency (FEMA) that covered almost $3 million dollars of the cost. An additional $1 million dollars was funded through the three local entities participating in the Boxelder Stormwater Authority (Town of Wellington, City of Fort Collins, and Larimer County). The remaining cost was covered by Boxelder Stormwater Authority fees.

    Environmental Assessment

    As a part of the PDM grant process, FEMA completed an Environmental Assessment (EA) of the project. FEMA is required under the National Environmental Policy Act (NEPA) to consider all reasonable alternatives for reducing the potential for future flooding in the Wellington Area.

    Based on the results of the analysis and following the public comment period, A Finding of No Significant Impact (FONSI) was made for the proposed Coal Creek Flood Mitigation Project.

    A supplement to the EA was prepared to document revisions made to the final design of the Coal Creek Flood Mitigation Project. The Project still addressed the purpose and goals as described in the original EA and approved in the original FONSI. The overall project elements, location and approach are the same, but refinements in the final design have resulted in fewer impacts than assumed in the original EA.

    Notice of the Supplement to the EA was published in the Coloradoan newspaper on February 28, 2011. The finalization of the EA supplement was completed in 2011.

    Current Status

    The design phase of the project was completed in early 2011. Construction started in 2011 and was completed in late 2012.

    During the design phase, some of the items completed included: holding an open house to share information and receive input on draft plans, completing the technical design and plans, submitting design and analysis information to FEMA for review and approval, and working on numerous agreements with both the North Poudre Irrigation Company and other landowners.

    The project construction was completed in two parts:

    The first part was the construction of the County Road 7 bridge over the North Poudre Inlet Canal just south of CR 70. This work was done during the spring of 2011.

    The second part of the construction included the dredging of Clark Reservoir, an addition to the emergency spillway of the reservoir, and the widening of the remainder of the inlet canal. That construction began in summer 2011 and was completed in late 2012.

    Each month, Larimer County provides a "Status Report" of the project to the Boxelder Stormwater Authority Board of Directors. Those reports can be accessed below.

    Status Reports

    Overall Project Timeline

    Construction occurred in 2011 and 2012. Final project closeout is undeway.

    Public Information

    A preconstruction public meeting was held on Thursday, January 6, 2011, to provide details (see handout) on the construction work on County Road 7.

    Exhibits from the Open House held Tuesday, June 15, 2010:

    Other Public Information

    Some residents living along Indian Creek had questions and concerns about the project's impact on Indian Creek.

    Contacting Project Staff

    Project questions can be addressed to:

    Martina Wilkinson
    Send e-mail

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