The highest point in St. Johns County, Florida is only slightly above 65 feet above sea level and drainage divides are indistinct and readily influenced by cultural features. This report delineates some 80 drainage basins (or artificial equivalents to natural basins such as the Intracoastal Waterway) within the county and their areas in square miles. Total area of St. Johns County is about 670 square miles. (USGS)
Additional publication details
USGS Numbered Series
Drainage basins in St. Johns County, Florida
Water-Resources Investigations Report
1 map : col. ; 58 x 42 cm., on sheet 66 x 86 cm., folded in envelope 31 x 24 cm.