Fire crews fought for hours Thursday at an industry in Logansport.

The initial call came out just before 5 p.m. The Logansport Fire Department responded to the A. Raymond Timmerman Manufacturing facility at 800 West, CR 250 South to a possible fire in the heat-treating facility.

Crews arrived to find smoke coming from the roof. The fire was discovered burning in the void space between the old roof and the new roof. At that point, a call to all off-duty firemen was sent out.

Firefighting efforts were hampered due to the fact that a below grade tank of heat treat quench salts was located just below the fire. Quench salts are extremely reactive with water and are explosive. Grissom Fire was contacted for assistance with a large amount of dry powder extinguishing agent which proved to be a very valuable resource.

The fire was finally brought under control at 9:30 p.m. It’s been classified as accidental and will be investigated by the Indiana State Fire Marshal’s Office.

Agencies assisting at the scene included the Logansport Fire Department, Cass County EMS, Cass County Fire District 1, Logansport Police, Fulton County Sheriff’s Office, Grissom Fire Department, Cass County Emergency management, Red Cross, Cass County Traffic Control unit, Logansport utilities, NIPSCO and the Indiana State Fire Marshal’s Office.