I-10: Highland Road to LA 73
East Baton Rouge and Ascension Parishes
Forte and Tablada’s Advanced Measurements and Modeling department scanned a total of four bridges: Highland Road, Bayou Manchac Crossing, Bluff Road and LA 73. The laser scans were tied back to survey coordinates. Each bridge presented its own unique challenge that had to be overcome on-the-fly. Bluff Road was very narrow, requiring the fabrication of a special bracket to mount the scanner on the barrier to keep it out of traffic lanes. Highland Road and LA 73 both required the placement of special targets at the top of each bent cap to obtain necessary elevation data. The most complicated bridge was Bayou Manchac Crossing, which was flooded due to heavy rains and discharge pumping from Spanish Lake. The muddy, rocky terrain was difficult to traverse and many scan positions required placement of the scanner in knee-deep water. The data from each bridge was then compiled, filtered, and exported for CAD. Individual points were then selected, coded, and incorporated into the surveyors’ workflow for the DOTD deliverable, decreasing the time spent in the field and office. Laser scanning provided a safer way to collect much of the data as the information can be remotely obtained without exposure to traffic.
Land Surveying services for engineering design to widen I-10 toward the median from a four-lane freeway section to a six-lane freeway section. The distance was approximately 7.0 miles long. Forte and Tablada, Inc. was responsible for all services necessary to complete a topographic survey of the entire site.
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