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Flood Recovery: Larimer County Road 27 (Buckhorn Rd) Larimer County, CO

Larimer County Road 27 (LCR 27), also known as Buckhorn Road, crosses Buckhorn Creek numerous times in approximately 9.5 miles between Masonville, Colorado and the junction of Larimer County Road 27 and Larimer County Road 44H. Prior to the September 2013 Flood, Buckhorn Creek was served along LCR 27 by multiple bridge and large culvert installations through this area. During the flood one bridge was damaged, seven large culvert installations were lost, and damages to LCR 27 itself ranged from minor damage to completely destroyed in multiple locations along this reach.

The September 2013 Flood demonstrated the insufficiency of the pre-flood road/creek system in enduring the hydraulic forces of large events, and efforts on this project were channeled into:

  • Evaluating the existing condition hydrology of Buckhorn Creek for the selection of design discharges.
  • Indirect evaluation of the September 2013 Flood hydrology.
  • Repair of one existing bridge, and design of three new bridges and four new culvert crossings.
  • Design of a new LCR 27 road/Buckhorn Creek alignment through the Narrows reach where LCR 27 was completely destroyed.
  • Design of erosion countermeasures for the system.

Full Project Description

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