Damaged culvert in Fremont Older Open Space Preserve

Prospect Road Culvert Replacement Project

The Prospect Road Culvert Replacement Project is set to enhance flood protection for the roadway and public parking area by replacing a damaged culvert beneath the road within Fremont Older Open Space Preserve. The culvert was severely damaged during the 2022-2023 winter storms.

The culvert is essential for both ecological function and public access. It facilitates the flow of Prospect Creek while supporting Prospect Road, a multi-use trail and the only vehicular access to residences within the preserve.

Construction Timeline

Construction crews have mobilized and started work. Prospect Road Trail is now CLOSED. Work is anticipated to last through late October. 

Project Map

Prospect Road Culvert Project map
Public Access, Education, and Outreach
Public Access
Fremont Older Detour Map - Prospect Road Closure

Trail Access

The culvert replacement project will require the closure of Prospect Road on weekdays during the construction period. For preserve visitors, please use the Cora Older Trail as a detour. For residents, construction crews should be able to clear the site and allow for vehicle access within approximately 5-10 minutes. 

Goals and Objectives

The project will include:

  • Replacing the damaged culvert: Replace the damaged corrugated metal pipe, its headwall and the washed-out section of Prospect Road above it.

  • Enhancing ecological function: The new design, which will include a larger culvert and embankment stabilization, will improve the natural flow of Prospect Creek and prevent future erosion.

  • Ensuring continued public and residential access: The project will increase the integrity of the road for both preserve visitors and private residents lowering the risk of future damage.

  • Designing for Resilience: The project will incorporate new design features to withstand future large flow events.

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Timeline

Winter 2022/2023Severe storms damaged the culvert below Prospect Road.
August 2025Beginning of construction 
October 2025Anticipated ending of construction.

 

 

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