District of Columbia. Annual report upon repair of Aqueduct Bridge across Potomac River at Washington, D. C., and report upon survey for memorial bridge across Potomac River to Arlington estate, and for bridge across Anacostia River, by Chas. J. Allen, and report upon survey for stone bridge and for steel bridge over Rock Creek, by D. D. Gaillard; app. A A A of report of chief, 1898.