 The fort was garrisoned again after additional work was performed during the Spanish–American War and World War I.In the 1890s Fort Popham received new facilities for a controlled minefield in the river at the fort as part of the Endicott program of improved fortifications.In 1898, shortly after the Spanish–American War broke out, Congress made numerous emergency appropriations, including $3,200 to deploy the mines in the Kennebec.