(PORT HURON) -- Volunteers are working to restore one of St. Clair County's oldest buildings. Dennis Delor, a member of the Committee to Preserve the Fort Gratiot Hospital, says that "because of its age, it's not something you can let continue to sit and rot away." He says inaction would have led to the removal of the hospital built in 1829. Fort Gratiot was a military reservation at the outlet of Lake Huron. The hospital was abandoned and converted into two private residences in 1879. The Port Huron Museum acquired the structures, and they were reunited in 2004 at Lighthouse Park on Omar Street in Port Huron. Donations of material, time and money for the project estimated at more than $100,000 are being sought.