Near the community of Lucia, Monterey County, CA, at a steep and unstable area of the Big Sur coast known as Paul's Slide, repair and containment operations have been ongoing for several years - an earlier project protects California State Route 1 with a 300-foot rockshed at the southern part of the slide. Regular rockslides, severe enough to force repeated road closures, prompted plans to build a viaduct. Winter rains in 2016/17 forced Caltrans to cancel that project and replace it with an Emergency Storm Damage Repair contract.
To keep equipment and personnel out of harm's way while ensuring satisfactory progress, the construction company hired IDS GeoRadar to install their IBIS-FL synthetic aperture radar, which can keep a precise eye on the slope's movements day and night. Digital elevation model, planimetric mapping and 3D modelling requirements for this cutting-edge technology were provided by Hawk Aerial Geomatics, with a day's flight capturing 256 acres of terrain, and ground control provided by Caltrans Survey.
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