Ann Arbor Maintenance – Gallup Park Culvert Project

Project Overview

A section of the Border to Border (B2B) Trail between Gallup Park and Geddes Dam is currently closed due to significant deterioration discovered in culverts located beneath the trail embankment.

In July 2026, City staff identified a sinkhole above one of three submerged culverts within the B2B Trail corridor. Subsequent underwater inspections found severe corrosion, separated pipe joints, and active soil loss within portions of the culvert system. Investigations determined that deterioration of the culverts is allowing surrounding soils to migrate into the pipes, creating underground voids beneath the trail.

As these voids develop, they can lead to ground settlement, additional sinkholes, and potential instability of the trail embankment. Based on these findings, engineering consultants recommended closure of the affected trail segment to protect public safety while the extent of the deterioration is fully evaluated and a long-term solution is developed.

The City is currently evaluating repair and replacement alternatives and coordinating with regulatory agencies to identify the most effective approach for restoring the trail connection and ensuring the long-term safety and reliability of this important community asset.

To stay up to date with this progress, check out the City of Ann Arbor’s webpage about this project.

Contact Information

Questions concerning the project should be directed to:
-Primary Contact: Hillary Hanzel, City of Ann Arbor Landscape Architect
phone:  734-794-6230 x42548
email:  hhanzel@a2gov.org
-Peter Sanderson, Project Manager, Washtenaw County Parks and Recreation,
email: sandersonp@washtenaw.org

Follow the project at B2BTrail.org for construction progress updates.