High-Resolution Acoustic Multibeam Surveys for Bridge Assessment
High-Resolution Acoustic Multibeam Surveys for Bridge Assessment
High-Resolution Acoustic Multibeam Surveys for Bridge Assessment
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Figure 5. Rotatedcolor hillshade bathymetric surface model of an area around a railroad bridge overr the Sheepscot River near Wiscasset, ME.This hillshade surface model was developed from a 0.5‐foot minimum grid created from R2Sonic 2024 multibeam data acquired on Orion. Thestructural supports from the existing bridge are in the <strong>for</strong>eground, while the prominent rubble mounds remaining froma previous bridge are inthe background. Though these rubble mounds posed a significant hazard to navigation that becamee visible during low tide, they weree notrepresented on the applicable nautical charts <strong>for</strong> this area.13
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