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USGS1976

Flood-prone areas of Jacksonville, Duval County, Florida

Floods in the consolidated city of Jacksonville, Duval County, Florida, are caused directly by rainfall which, when combined with storm driven tides, causes rivers or other bodies of water to flood the low lying parts of the county. This map report supplies information on areas subject to floods of 100-year frequency; the information will permit evaluation of alternative uses of such areas. The extent of the 100-year flood is shown on the large-scale map accompanying the report. Also included is an index map showing sections of Duval County where more detailed information on the 100-year flood can be obtained. The major flood of record in the county occurred in 1964 when Hurricane Dora crossed the area. (Woodard-USGS)

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USGS1975

Flood-prone areas of Gadsden County, Florida

Gadsden County is an area of 508 square miles in northwest Florida. The topography of the county is diverse and ranges in altitude from about 50 to 300 feet above mean sea level. Well drained steep hillsides and narrow ridgetops give way to broad, nearly level, poorly drained plateaus which have steep sloping sides, In eastern and central Gadsden county, streams tributary to the Ochlockonee River flow southeastward through a moderately steep terrain. The western part of Gadsden County is an area of rugged and broken topography and deeply incised streams that are tributary to the Apalachicola River.

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