Project Description: SEAS was contracted by the USACE Louisville district to provide topographic & Hydrographic surveying services for river bank protection at three sites on the Ohio River, the New Albany / Jefferson in Ohio site (52-acres), Portland wharf site (±5.5 acres) and Shawnee park site (±5.5 acres).
✓ Location of all planimetric features within the survey limits (buildings, sidewalks, roadways, parking areas, visible utilities, trees, fences, manholes (with inverts), all drainage structures, fire hydrants and water valves)
✓ Topographic data collection for 1’ contours at a map scale of 1”=50’ American Society of Photogrammetry and Remote Sensing (ASPRS) Class 2 Map Accuracy Standards
✓ Multibeam (MB) bathymetric data collection 100% coverage
✓ Establish survey control at each site
✓ MicroStation 3D DGN & DTM files compliant to A/E/C CADD Standards
Topographic data collection: SEAS survey crews utilized Topcon GR3 Dual Frequency GPS receivers using real-time kinematic (RTK) corrections and a PS103A Total Station to collect topographic data. Control was established via the Indiana Department of Transportation (INDOT) InCORS virtual reference network (VRN). All topo data was collected using feature codes and logged into a field book. SEAS also utilized a mobile LiDAR solution for mapping and topographic data collection. The Optech LYNX Mobile Mapping System (MMS) was mounted on the survey vessel to collect the shoreline and beach areas.
Hydrographic data collection: Soundings were collected with a RESON SeaBat 7125 Echo Sounder (MBES). An Applanix POS MV Wavemaster GNSS/IMU System provided position, heading and attitude for the MBES w/ PPK. Sound Velocity profiles were collected with a RESON SVP-14. The survey vessel utilized for this survey was a 28’ custom Scully’s with moon well and twin 200hp Yamahas. Hypack was used to collect/process data.
Added Value: SEAS also flew the New Albany/Jefferson IN Ohio site with the SenseFly eBee, an Unmanned Aerial System (UAS) fixed wing drone. SEAS delivered georeferenced rectified ortho imagery of the 52-acre site!