Kennebec Arsenal
Kennebec Arsenal postcard. Photo: Raphael Tuck & Sons
Perched high above the Kennebec River, the Kennebec Arsenal was constructed between 1828 and 1838 in the aftermath of the War of 1812. The enormous cost of that conflict, coupled with the ongoing border dispute between Maine and New Brunswick, prompted the federal government to strengthen the nation's defenses. Across the country's coasts and inland waterways, a "Third System" of forts, arsenals, and armories was established, and this site was selected for its strategic location and easy access by boat. During the same period, Maine's coastal defenses were expanded with the construction or modernization of forts including Fort Knox, Fort Popham, Fort Gorges, Fort Scammel, and Fort Preble.
Most of the arsenal's construction took place between 1828 and 1831, including the main armory, commandant's quarters, officers' quarters, barracks, stables, and a carriage shop. Built of locally quarried granite, the principal buildings reflected the Greek Revival style, while a munitions laboratory and powder magazines were also completed. During this period, the border dispute reached its height, with both Maine and New Brunswick mobilizing militia forces along the contested frontier. General Winfield Scott arrived at the arsenal in time to negotiate a peaceful stand-down, and the dispute was ultimately resolved by the Webster–Ashburton Treaty of 1842, which established the border much as it exists today.
After tensions along the border subsided, the arsenal gradually became less important. Although weapons were manufactured here during the Mexican-American War and the American Civil War, its remote location made large-scale production impractical. The federal government eventually closed the arsenal and transferred the property to the State of Maine.
Beginning in 1836, the neighboring Maine Insane Hospital expanded into a sprawling campus adjacent to the arsenal. At its peak, the institution housed more than 1,800 patients and occupied over 800 acres, including 600 acres of farmland. After the arsenal was transferred to the state, several of its massive granite buildings were adapted for hospital use as the Maine State Hospital expanded.
Eventually renamed the Augusta Mental Health Institute, the hospital closed in 2004, and the property was sold to developer Niemann Capital. Since then, redevelopment has been delayed by disputes between the developer and the City of Augusta over missed project deadlines. In the meantime, visitors may see students from the Maine School of Masonry, working in partnership with the Maine Historic Preservation Commission, carrying out historically appropriate repairs to the campus's two-foot-thick granite walls. Today, the complex is listed on the National Register of Historic Places and stands as Maine's finest surviving example of an early nineteenth-century military depot.
