A major port city, Baltimore lies on the Patapsco River, an arm of this bay
... of 
Baltimore during the Civil War, done to keep the city, a major trade port which... [DOC] [TLE] Harbor Guide - Baltimore | Maryland - USHarbors [PAR] Baltimore Harbor consists of the entire Patapsco River and its tributaries; a part of 
the waterfront thus included lies outside the municipal limits of Baltimore, but by 
State