Georgia Digital Flood Insurance Rate Maps Updates
Wolverton performed surveys for approximately 55 miles of the Chattahoochee River as well as approximately 140 miles of tributaries in Coweta, Douglas, Forsyth, and Fulton Counties. These surveys captured cross sectional measurements of the various water courses in compliance with the FEMA Data Capture Standards. Both natural channel cross sections and hydraulic structure cross sections were included. Using high accuracy GPS receivers and robotic total stations on a jet boat in the middle of the river, we were able to provide accurate data while meeting a demanding schedule. The Chattahoochee River has complex interstate highway and railroad bridges that require exceptional care be taken to gather the required hydraulic data for the flood model. In addition, the sheer magnitude of the river presented a major challenge simply by the volume of water and the swift currents. Throughout the tributary efforts, Wolverton obtained landowner access, dealt with dense vegetation and collected quality data across the reaches of the Chattahoochee's complex network of backwaters. Our team skillfully navigated these waterways to the ultimate success of the project. With our deliverables of hydraulic cross sectional sketches, detailed sets of photographs of each feature and accurate point based data sets, we provided the foundation for this vital map update effort.
Location: Newnan, GA
Project Type: Utilities/Energy