Reach 3 Projects

Reach 3 starts at Airport Road in Longmont, and goes west to US 36. This reach is primarily rural, although the St. vrain Creek interacts with the existing sand/gravel mining sites and irrigation ponds. During the flood, large split flow paths cascaded through the reclaimed gravel mining ponds. One split channel resulted in flooding outside of the 100 year floodplain and affected neighborhoods downstream in the City of Longmont.

The overall restoration goals, planned by Boulder County Parks and Open Space, are to be completed in March of 2018. They are listed as:

  • Repair four of the nine stream breaches (1, 2, 6, and 7a, see map) to reduce the risk of future catastrophic failure
  • Remove the metal and concrete debris left behind by the flood
  • In select areas, restore, grade, and shape the channel to minimize future erosion
  • Restore riparian vegetation to areas stripped bare by the flood

St. Vrain Creek Restoration – US 36 to Airport Rd
The project in this area, known as “Reach 3” or “The Breaches”, is being managed by Boulder County Parks and Open Space (BCPOS), who hired a consulting team led by Engineering Analytics. The design portion of the project is funded by the Colorado Department of Local Affairs (DOLA) Community Development Block Grant – Disaster Recovery (CDBG-DR). The project team is currently in construction phase and weekly construction updates are posted by BCPOS here.

The construction phase of the project began in 2017 and is funded by Boulder County, the Natural Resources Conservation Service (NRCS) Emergency Watershed Protection Program (EWP), and the Colorado Water Conservation Board (CWCB).

The SVCC and our stakeholders have provided a number of comment letters with feedback on the project to Boulder County Parks and Open Space. You can find those letters below:

Pella Crossing Reconstruction
Pella Crossing Recreational Area, owned by Boulder County Parks and Open Space, has a special place in many people’s hearts – many loved to fish, hike, view wildlife, and relax at Pella Crossing before the floods. The reconstruction of Pella Crossing began in September 2016, and was complete in Spring 2017. Boulder County fixed the breaches between the ponds, rebuilt the trails, and restored the trailhead. This approximately $3M project was being funded by FEMA, the state, and Get Outdoors Colorado (GOCO).