 The 1886 report recommended a $127-million ($ in 2020) construction program of breech-loading cannons, mortars, floating batteries, and submarine mines for some 29 locations on the US coastline.New fortifications built in the following decades as a result of this report were called "Endicott Period" fortifications.Finding a need for long range weaponry, the United States Army Coast Artillery Corps ordered a 16-inch (406 mm) gun, the construction of which began in 1895 at the Watervliet Arsenal in Watervliet, New York.