Flood Information


Major flooding on Sept. 11-15, 2013, impacted several areas throughout the City of Longmont. As of September 2016, repairs to most areas damaged by the flooding were completed. The focus now shifts to efforts to improve our community's resilience to future flood events, which will take time and will have lasting effects on our community.

As we all work together to rebuild, it is our goal to keep the community informed and involved.

Education sign explaining work on Resilient St. Vrain Informational signs posted along the St. Vrain Greenway offer an overview of Longmont's flood recovery and protection efforts since the 2013 flood. The signs were unveiled in September 2016, in observation of the third anniversary of the flooding.

Signs may be viewed at several locations along the St. Vrain Greenway trail, as well as at the Longmont Recreation Center and the Civic Center.

Click on the sign image to view a larger version of the sign, which can then be enlarged or downloaded.

Beginning immediately after the flood, several efforts began to help impacted people, property and infrastructure.

Click the logos below to learn more about efforts in each area.

  Longmont CARES  Longmont Works Flood Recovery  Longmont Post Flood Awareness  Resilient St. Vrain





Follow Our Journey

See progress toward full flood recovery and future flood protection. There are two summits, Recovery Peak and Protection Peak, which reflect the goal to become a more resilient community.

Learn more about resilience >

Journey to Completion

Note: Peak costs and total cost are based on 2016 evaluations and may adjust as more information is gathered. Our hikers represent total dollars the City has spent through December 2016 for each summit.

Recovery Peak

September 2013's flood damaged or destroyed much of Longmont's infrastructure. Most repairs to streets, parks, trails, drainage, water resources, power lines and public buildings were completed by the third anniversary of the flood event, in 2016. These recovery projects cost an estimated $25 million, which was paid for with a combination of local, state and federal dollars. Visit the Recovery Updates page to view the status of remaining flood-related projects.

Protection Peak

After the 2013 flood, the City of Longmont identified key projects that should be completed to mitigate future flood damage, preventing such a catastrophe from occurring again. Resilient St. Vrain is the City's extensive, multi-year undertaking to fully restore the valuable community asset of the St. Vrain Greenway and improve the St. Vrain Creek channel to protect people and property from future flooding.The estimated cost for the Resilient St. Vrain project is $120 million to $140 million.

City Manager Harold Dominguez and Public Works & Natural Resources General Manager Dale Rademacher discuss  the role that flood protection efforts, including work on Resilient St. Vrain and bridge replacements, play in Longmont's Capital Improvement Program in the 2-minute video below.

Free viewers are required for some of the attached documents.
They can be downloaded by clicking on the icons below.

Acrobat Reader Flash Player QuickTime Windows Media Player Microsoft Silverlight Word Viewer Excel Viewer PowerPoint Viewer
View Full Site