From September 11-15, 2013, Longmont experienced the most devastating flash flood event in its history. Catastrophic flooding, especially along the St. Vrain Creek, displaced hundreds of residents, and destroyed personal property, businesses and public spaces. The flooding caused extensive damage to much of our city's infrastructure and along the St. Vrain Greenway trail system.

Repairs to most areas damaged by the flooding were completed by the third anniversary of the flooding, in 2016. This included repair and rebuilding of damaged streets, parks, water resources, irrigation ditches, drainage systems, power lines and public buildings.

The projects that remain are being addressed as part of efforts to protect our community by restoring and revitalizing the St. Vrain Creek channel. Resilient St. Vrain is Longmont's extensive, multi-year project to fully restore the St. Vrain Greenway trails and improve the area surrounding the creek to protect people and property from future flooding.

• For information about boundaries of the 2013 flood (or other flood events), contact Longmont's Floodplain Administrator

• For details about specific recovery projects, contact Public Works & Natural Resources

• Aprenda sobre el Proyecto Resistente St. Vrain. Para información en Español llame al 303-651-8416

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Story Map of the 2013 Flood

Looking for Flood Insurance Rate Maps (FIRMs) or floodplain maps? Visit the St. Vrain Floodplain Updates webpage >

Is your property located within a floodplain? Find out with Longmont's Floodplain Inquiry Map >

Take a geo-coded, photographic tour of the 2013 flood area with this story map (or click the larger photo, below).

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Videos and Photos of the 2013 Flood

Revisit the 2013 flood through photos and videos >

The Colorado Resiliency & Recovery Office produced an online map book, 2013 Colorado Flood Recovery: Three Years of Progress, that provides a statewide look at damage and recovery from the flood.