Flood Information


Major flooding on Sept. 11-15, 2013, impacted several areas throughout the City of Longmont. Repair to areas damaged by the flooding are under way. These repairs, along with efforts to protect our community from future flood events, take time and effort 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.

  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. With the goal to become a more resilient community there are two summits, Recovery Peak and Protection Peak. Our hikers represent total dollars the City has spent through Q1 2016 for each piece. Journey to Completion - Flood

 Note: Peak costs and total cost are based on 2015 evaluations and may adjust as more information is gathered.

Protection Peak

After the flood, the City 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 of Longmont’s extensive, multi-year undertaking to make the community more resilient for future floods by reducing the size of the floodplain through Longmont, while also restoring the valuable community asset of the St. Vrain Greenway.

  • Estimated Cost: $120 M-$140 M
  • Existing Funding: $73 M, including $20 million in voter-approved Storm Drainage Bonds
  • Funding Shortfall: $47 M-$67 M, for which the City is actively seeking grants and other funding possibilities.
  • The project is in final design with construction anticipated to begin in late 2016.

Recovery Peak

September 2013's flood damaged or destroyed much of Longmont's infrastructure. Repairs to streets, parks, trails, drainage, water resources, power lines and public buildings will cost the City of Longmont an estimated $55 million. These recovery projects are being paid for with a combination of local, state and federal dollars. Visit the Recovery Updates page to find a list of flood-related projects and their current status.


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