Construction of the Tampa Bypass Canal, Florida has resulted in an increase in streamflow from the canal area. Base-flow discharge is more than twice preconstruction amounts. Discharge from springs has decreased by one half or more. Ground-water levels show an increase of up to 4 feet near structure S-160 due to impoundment of water. Elsewhere, levels have generally decreased by 2 to 4 feet. Some minor changes in water quality have occurred. Some of the changes, however, may be attributed to factors other than canal construction. (USGS)