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tidewater,in U.S. history, that part of the Atlantic coastal plain between the shoreline and the farthest upstream points in rivers reached by oceanic tides. In many cases the fall linefall line,
boundary between an upland region and a coastal plain across which rivers from the upland region drop to the plain as falls or rapids. A fall line is formed in an area where the rivers have eroded away the soft rocks of a coastal plain more quickly than the older
..... Click the link for more information. is given as the western boundary. The tidewater, with its good harbors readily accessible to the ocean, was settled first by European colonists. Later the Southern tidewater became one of the many regions of large plantations as well as an area of important commercial towns.
A body of water, such as a river, affected by tides.
Water inundating land at flood tide.