South St. Vrain Creek Restoration

South St. Vrain Creek Restoration

Implementation of post-flood restoration along South St. Vrain Creek at Hall Ranch Open Space, which was severely damaged by the September 2013 flood, has begun.

Flood Restoration

The South St. Vrain Creek Restoration Project includes approximately 1.2 miles of the creek and associated floodplain.

Schedule

Per EWP guidelines, the construction needs to be completed within 220 days and no later than December 31, 2017. The projects will require a minimum of 3 years post-construction monitoring, which Parks & Open Space will be responsible for. This schedule will be updated as needed throughout the project.

Goals

The goal of the project is to restore and improve the channel and surrounding floodplain to protect life and property and provide a safe, natural, resilient, functioning, and ecologically rich habitat utilizing natural system principles. The project will expedite recovery from the 2013 floods and make the area more resilient in future flood events.

Specific components of the project include:

  • Incorporating natural channel diversity and character
  • Re-establishing floodplain benches for lateral connectivity
  • Reducing longitudinal connectivity constraints
  • Improving flow conveyance and sediment transport
  • Promoting naturally functioning stream processes
  • Protecting public and private infrastructure
  • Repairing unstable erosion scars in high-risk areas
  • Revegetating denuded areas with native species

South St. Vrain Creek Restoration Map

Please note this is an active construction site, and members of the public are not allowed to enter the site.

Funding

Funding for this project is from the Natural Resources Conservation Service’s Emergency Watershed Protection program, the State of Colorado through the Colorado Water Conservation Board, and Boulder County.

Documents

Previous Planning & Preliminary Design

Boulder County Parks & Open Space, along with the St. Vrain Creek Coalition, neighbors, and other stakeholders, collaborated on post-flood restoration along South St. Vrain Creek, which is part of Reach 4b in the St. Vrain Creek Watershed Master Plan.

30% Design & Basis of Design Report

In late 2015, the county secured a Community Development Block Grant – Disaster Relief (CDBG-DR) planning grant through the Colorado Watershed Resilience Planning Grant Program. The CDBG-DR grant covered planning, engineering and ecological surveys and analysis, restoration alternatives analysis, 30% design, and public engagement for post-flood stream restoration projects throughout a 3.2-mile corridor. The planning area extended from Custode Open Space downstream to the end of Hall Ranch Open Space (Hall Meadows) at the existing Old St. Vrain Road Bridge. This portion of the project, which was led by Matrix Design Group and Parks & Open Space, wrapped up in September 2016.

South St Vrain Map

Emergency Watershed Protection Projects

Two sections of the 3.2 mile study reach (referred to as SSV 1 and SSV 2) were identified for funding through the Natural Resources Conservation Service’s Emergency Watershed Protection (EWP) program in late 2015. The EWP program provides financial assistance for implementation of approved creek restoration plans. The county has worked with the EWP team to ensure the project meets EWP objectives and has worked to secure the necessary EWP funding for this project. In addition, Boulder County will utilize additional county funds to extend the project upstream of SSV 1 to the Andesite Bridge, which was necessary to tie the creek into SSV 1 per the 30% design plan.

The consulting team, led by Matrix Design Group, and Parks & Open Space finalized the plans and specifications for SSV 1, SSV 2, and the area upstream of SSV 1 in February 2017. Parks & Open Space, along with Matrix Design Group’s assistance, has also worked to secure all necessary local, state, and federal permits for the project.

Funding for implementation for the remainder of the 3.2 miles analyzed in the 30% design has not yet been secured, and all projects proposed in the 30% designs will be dependent on the county and / or its partners receiving additional funds for final designs, permitting, and implementation.

Past Public Meetings

Update to St. Vrain Creek Coalition – November 16, 2016

The project team presented a brief update at the St. Vrain Creek Coalition meeting. The update included information about the completion of the 30% design phase for the entire 3.2 mile reach, our next steps in the final design process for EWP-eligible sites, and our anticipated construction schedule for the EWP-eligible sites.

Final 30% Design Presentation – September 22, 2016

The project team presented an overview of the Final 30% Design and Basis of Design report for post-flood restoration to the Parks & Open Space Advisory Committee on September 22.

Draft 30% – August 17, 2016

The project team presented the Draft 30% Design and Basis of Design report for post-flood restoration to the St. Vrain Creek Coalition and other interested members of the public. The meeting was part of the St. Vrain Creek Coalition’s Project Committee meeting, but was open to all interested members of the public.

Preferred Alternative Site Visit – July 28, 2016

The project team conducted a site visit with the St. Vrain Creek Coalition and interested members of the public. They discussed the preferred alternative for post-flood restoration of South St. Vrain Creek immediately upstream of the Andesite Mine down to the eastern Old South St. Vrain Road Bridge. The purpose of the site visit was to walk key segments of the planning area, review the preferred alternative, discuss how it was developed, and answer questions.

Alternatives and Preferred Alternative – June 30, 2016

A public meeting was held on June 30 to review alternatives for the restoration of South St. Vrain Creek and to provide a summary of the engineering and other analysis that was used to develop alternatives. Consultants addressed concerns, provided responses, and made appropriate changes as necessary. In addition, the project team gave an update to the St. Vrain Creek Coalition on June 29.

Project Goals & Scoping – May 24, 2016

Parks & Open Space and its consultant, Matrix Design Group, held the first of several public meetings on May 24 in Lyons. The purpose of the first meeting was to provide a general outline of the engineering and restoration design process and to review and discuss project goals and objectives.

The project team facilitated a discussion with attendees about the goals and other issues and concerns about the project. Notes from the meeting will be posted soon. An update to the St. Vrain Creek Coalition occurred on Wednesday, May 25, at their regularly scheduled meeting.

Initial Presentation – August 20, 2015

A short presentation was given to stakeholders that included an overview of the planning area, including existing county open space management plans, completed and on-going projects throughout the corridor, assessments and recommendations from the St. Vrain Creek Watershed Master Plan, cost estimates and funding, and some design considerations.

Contact Us

Parks & Open Space

Ernst Strenge
303-678-6269