PROJECT DESCRIPTION:
The Resilient St. Vrain Project includes two reaches of the St. Vrain Creek in Longmont - City Reach and Sandstone Ranch Reach. The
Sandstone Ranch Reach extends from County Line Road on the upstream end to the confluence of Boulder Creek on the downstream
side. The City Reach extends from Airport Road on the upstream end to the confluence of Left Hand Creek on the downstream side.
Project goals for the Sandstone Ranch Reach include restoration of damage to the St. Vrain Greenway and stabilization of the creek in
its post 2013 flood location adjacent to roads and other infrastructure to protect them from future damage. The Sandstone Ranch Reach
is complete and the Greenway Trail re-opened to the Sandstone Ranch District Park in the summer of 2018.
Project goals in the City Reach focus on reestablishment of the St. Vrain Greenway; channel improvements to protect people, property
and infrastructure from future flood risks; and to complete these improvements in the most environmentally sensitive manner possible.
City Reach improvements are a multi-year project that is being constructed in phases/reaches. Construction on City Reach 1 (Main
Street to Left Hand Creek) is complete. Construction of City Reach 2A (Colorado Way to Main Street) and City Reach 2B (upstream of
the BNSF Railroad Bridge to Colorado Way) are also complete. Construction of Izaak Walton Reach 1 (Boston Ave. to upstream of the
BNSF RR Bridge) is scheduled to be complete in early 2022. Funding for these sections comes from several sources including: FEMA
Disaster Recovery funds, FEMA Hazard Mitigation Grant Program funds, Community Development Block Grant Disaster Recovery
(CDBG-DR) funds, Longmont voter approved Storm Drainage Bond funds, and voter approved Street Fund Sale Tax funds for
replacement of various bridges crossing the Creek.
The City is currently working with the US Army Corp of Engineers (USACE) on the next phase of channel improvements, Izaak Walton
Reach 2 (S. Sunset Street to Boston Avenue). The City has entered into a Public Partnership Agreement with the USACE under their
205 Program for final design and construction of Izaak Walton Reach 2. The total project cost is approximately $15 million with the
USACE share at approximately $8 million and the City's local match at approximately $7 million. The City's share for the USACE project
consists of approximately $750,000 for final design, credit for the land and right-of-way owned by the City along the St. Vrain Creek,
acquisition of additional land and right of way required for the project, and replacement of the Boston Avenue Bridge identified in CIP
Project TRP118, Boston Avenue Bridge over St. Vrain Creek. Final design for the channel improvements is scheduled to be complete in
mid-2022 with construction starting in late 2022.
Final design and construction of the next phase(s) from Airport Road to S. Sunset Street are dependent on future funding. The City is
currently working on grant funding options for a future phase upstream of Sunset Street which is referred to as the Hover Road Reach
(Hover Road to Sunset Street). The Hover Road Reach is estimated to cost approximately $21 million. Federal grant funding could
cover up to seventy-five percent (75%) of the project costs or approximately $15.75 million. The Hover Road Reach includes bridge
improvements at Hover Road identified in CIP Project TRP117, Hover Street Bridge over St. Vrain Creek which accounts for
approximately $6 million of the total $21 million costs. CIP Project TRP117 is currently unfunded.
Project improvements upstream of Hover Road remain in the storm drainage master plan and are currently unfunded. As of April 3, 2023, this project is included in the City of Longmont's FY 2023-2027 CIP and is planned for FY 2024 amd FY 2027. *Project information has been obtained through a public capital improvement plan (CIP). A CIP is a financial schedule for short- and long-range projects which is updated regularly. Information listed in the CIP often evolves based on funding availability and the project details, including timeline and value, are subject to change. The content management team will continue to pursue additional details as they become available.
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