Project Description: SEAS was contracted by the USACE Louisville district to provide topographic (±137 Acres), hydrographic surveying (± 3.3 mi. Levisa Branch), and storm sewer utility mapping (± 237 acres) services for design and construction of a flood wall. The work required involved collecting topographic/hydrographic/storm sewer and planimetric data in the vicinity of Paintsville, KY and Levisa Branch
✓ 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 .5’ contours at a map scale of 1”=20’ American Society of Photogrammetry and Remote Sensing (ASPRS) Class 2 Map Accuracy Standards
✓ Multibeam (MB) bathymetric data collection 100% coverage
✓ Establish survey control
✓ MicroStation 3D DGN & DTM files compliant to A/E/C CADD Standards
Topographic data collection: SEAS survey crews utilized Topcon Gr5/Hyper HR Dual Frequency GPS receivers using real-time kinematic (RTK) corrections and a Topcon Gt 1003 Robotic Total Station to collect topographic data. 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 a SEAS truck to collect the topographic data.
Strom Sewer Utility Mapping: SEAS also mapped Storm sewer utility mapping via a Collector for Arcgis Online and developed Geodatabase of stormwater infrastructure field collection. GIS data is hosted online for client review and comments.
Hydrographic data collection: Soundings were collected with a RESON SeaBat 7125 Mulitbeam 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 Digibar S. 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 had HALIS collect airborne lidar and 3” orthomosaics. Data collection was from a fixed wing aircraft with a Riegel 780i LiDAR sensor paired with a PhaseOne 100mp Camera. SEAS delivered georeferenced rectified ortho imagery of the entire survey area!
