Sediment Texture Samples Taken in HARS in 1996 and 1998 (offshore New York), USGS OFR 00-503

This GIS project presents multibeam and other data in a digital format for analysis and display by scientists, policy makers, managers and the general public. This project presents maps of the sea floor in GIS format of the Historic Area Remedition Site (HARS), located offshore of New York and New Jersey.

The data were collected with a multibeam sea floor mapping system on surveys conducted November 23 - December 3, 1996, October 26 - November 11, 1998, and April 6 - 30, 2000. The maps show sea floor topography, shaded relief, and backscatter intensity (a measure of sea floor texture and roughness) at a spatial resolution of 3 m/pixel, and locations of dredged material placed on the sea floor. The sea floor of the HARS, approximately 9 square nautical miles in area, is being remediated by placing at least a one-meter of clean dredged material on top of the existing surface sediments that exhibit varying degrees degradation resulting from previous disposal of dredged and other material.