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St. Vrain Creek Restoration: Phase 2
Reach 3 Phase 2

St. Vrain Creek Restoration (Reach 3): Phase 2

Restoration work will be conducted along the St. Vrain Creek located south of SH-66 between Union Road and N. 63rd Street. This section near the old “Breach 2” from the 2013 floods is known as Reach 3 Phase 2 or Phase II.

Phase 2

Phase 2 will create a resilient stream ecosystem and improve aquatic and riparian habitat, while protecting infrastructure by providing flood resiliency. Zak Dirt, with subcontractor Western States Reclamation, will be performing the work.

Outreach to ditch stakeholders started in December 2018. Boulder County bid out the design project in March 2019, and the design team started work in June 2019. The design team includes Otak, Ecos, Michael Baker International, Wright Water Engineers, and King Surveyors.

Funding is provided by the U.S. Department of Housing and Urban Development’s Community Development Block Grant Disaster Recovery Program (HUD CDBG-DR) administered by the Colorado Department of Local Affairs and the Boulder County Collaborative.

Phase I construction was completed in May 2018.


The project includes engineering design, permitting, and construction of the following restoration components:

  1. A low-maintenance bypass structure that will divert decreed water rights and sustainably direct high-energy flows and sediment away from the headgates, provide fish passage, tie into previous work, and improve ecological services in the project area.
  2. Modifications to the remnant Baker and Weese ditch that will protect adjacent infrastructure repaired since the 2013 flood.

Bid #7144-20 Details


  • Bid Selection and Contracting: June
  • Pre-Construction Meeting and Permit Phase: June to mid-July
  • Mobilization: Mid-July to early August
  • Breaking Ground: On or soon after Aug. 3

St. Vrain Creek Reach 3 Phase 2 Project Area Map

Project Background

Boulder County Parks & Open Space, along with the St. Vrain Creek Coalition, neighbors, and other stakeholders, collaborated on post-flood restoration planning for Reach 3 in the St. Vrain Creek Watershed Master Plan.

Parks & Open Space began planning and design work on Reach 3 of the St. Vrain Creek in 2016. The planning phase was funded by the HUD CDBG-DR and was a collaborative effort with stakeholders throughout the Saint Vrain Creek watershed.

Through a series of public meetings with neighbors, the City of Longmont, the St. Vrain Creek Coalition, and other stakeholders, the Engineering Analytics, Inc. design team developed a comprehensive plan and a 30% design.

Parks & Open Space then sought and received a grant from the Emergency Watershed Protection (EWP) Program from the Natural Resource Conservation Service (NRCS) as administered by the Colorado Water Conservation Board (CWCB). Utilizing this funding source, the 80% design for Reach 3 was completed by Engineering Analytics, Inc. in June 2017. American Civil Constructors LLC dba ACC Mountain West initiated construction in November 2017 and completed construction in May 2018.

A small portion of the construction scope, removed during the initial contracting agreement discussions, eventually became the Reach 3 Phase 2 project.

Contact Us

Parks & Open Space

Sharla Benjamin