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High-water marks produced by the storm tide from Hurricane Hugo on September 21-22, 1989, were identified, described, and level-surveyed along the coast of South Carolina from North Myrtle Beach to Seabrook Island. Three hundred fifteen high-water marks are presented in tabular form listing mark nunber, quadrangle map, latitude, longitude, type of mark (inside or outside), quality of the mark (goodt ±0.10 foot, fain ±0.25 foot, and poor: >0.25 foot), water-surface elevation, and ground elevation. High-water marks and contours of approximate storm-tide elevation are plotted on a series of thirty-one 7± minute topographic quadrangle maps. Average measured storm-tide elevations along the inner and outer coast are presented graphically and in tabular form. Average elevations of the storm-tide in feet above sea level near towns along the South Carolina coast are as followsi North Myrtle Beach was about 11 feet, 12 feet from Myrtle Beach to Pawleys Island Beach, 11 feet at Debidue Beach, 16 feet at McClellanville, 20 feet near Moores Landing, about 15 feet at Isle of Palms, 14 feet at Sullivans Island, 11 feet at Charleston, 12 feet at Folly Beach, 11 feet at Kiawah Island, and 7 feet at the North Edisto River mouth. INTRODUCTION Shortly after midnight on Friday morning, September 22, 1989, and one hour before high tide, Hurricane Hugo made landfall just north of Charleston, S.C. The hurricane, with sustained wind speed in excess of 135 miles per hour and moving west-northwestward at about 25 to 28 miles per hour (Purvis, 1989), left a path of destruction 60 to 100 miles wide from the coast inland to Charlotte, N.C. The storm tide peaked at about 20 feet above sea level in the vicinity of McClellanville, S.C., approximately 35 miles northeast of Charleston, S.C. High-water elevations of approximately 12 feet above sea level occurred as far as 80 miles to the northeast of Charleston in Garden City, S.C. The storm-tide was still powerful enough to destroy many beachfront homes in the areas. The U.S. Geological Survey, in cooperation with the Federal Emergency Management Agency (FEMA), collected data in South Carolina on the flood elevations and depths caused by Hurricane Hugo. This report presents storm-tide elevation data collected at 315 sites, and maps that delineate inundated areas along the coast. The data presented here may be useful for flood-insurance purposes, and in guiding future development in these areas. Water-surface contours, high-water marks, and the approximate areas flooded by storm tides caused by Hurricane Hugo are shown on a series of 7^ minute topographic quadrangle maps [plates 1-31). The area covered by the maps extends from the North Carolina-South Carolina border to Seabrook Island (North Edisto River mouth), a distance of approximately 135 miles [fig. 1). In general, the inland boundary of the area investigated was the landward extent of inundation. Special thanks are extended to William Massey, Federal Emergency Management Agency; Andrew Garcia, and Robert Occhipinti, U.S. Army Corps of Engineers; Brian Jarvinen, Ray Smith, Milton Rutstein, and Doug Martin, National Oceanic and Atmospheric Administration; John Purvis, South Carolina State Climatologist; Luke Nance, U.S. Soil Conservation Service, and also to home and property owners who allowed high-water elevation surveys to be made.

Storm-tide elevations produced by Hurricane Hugo along the South Carolina coast, September 21-22, 1989