From Harford County government:
In order to complete emergency repairs to a culvert along the Ma & Pa Trail, the Harford County Dept. of Parks & Recreation will close the Williams Street trailhead in Bel Air beginning on or about May 18 for approximately 30 days. During construction, the Ma & Pa Trail will continue to be accessible from the nearby Liriodendron Mansion’s parking lot. All other sections of the trail will remain available for use and will not be affected by the construction.
Storms over the years have caused significant erosion to the culvert located just past the Williams St. trailhead. Repairs are necessary to prevent further damage to the culvert and, ultimately, the trail. Work is planned to be completed on or about June 15, in time for the trail’s busy summer season.