Vaughn & Melton was assigned a new work order through their existing open ended agreement with the U.S. Corps of Engineers – Nashville District. The collection of survey data/mapping and the development of a GIS Database were created with dwelling information and evacuation routes for use in the event of an emergency. This project included 80 miles of the Cumberland River below Wolf Creek Dam (Lake Cumberland). The dam is on the Cumberland River in the western part of Russell County, Kentucky.
Control Network / Aerial Mapping
The Vaughn & Melton survey team established a project-wide GPS control network for use throughout the project. A subconsultant provided lidar acquisition and processing to bare earth for an accuracy level consistent with 2 foot contours, however contours were plotted at a 5 foot interval; and stereo compilation and edit of building footprints, low ground elevation at these buildings, and road edges.
Inventorying 80 Miles and 2000+ Structures
In the planning phase, V&M was responsible for breach analysis and producing the inundation area in the event of a failure at Wolf Creek Dam. Combining the analysis and inundation with existing data and mapping, V&M planned for the inventory and data collection of more than 2000 dwellings and businesses that are in the immediate downstream area. Planning was completed in coordination with the USACE, emergency management personnel, local utilities, and local officials to ensure that the necessary data and the process would suit the needs of all parties involved. Dwelling inventory included the ground elevation, first floor elevation, occupant and owner contact information, structure use, special needs assistance, and structure photo. All information was delivered in CADD/GIS format.
The GIS database will be used to develop plans for emergency evacuation in the event of dam failure or rapid drawdown of Lake Cumberland. The scenario is a “what-if” the dam breaches and a 100 foot vertical wall of water starts downstream, what is impacted. The route information included low points, bridge and culvert crossings over streams, and critical intersections.