VGW Geospatial has provided the U.S. Army Corps of Engineers, Albuquerque District with surveying and photogrammetric services on two consecutive IDIQ contracts. Services have included photogrammetric mapping requiring acquisition of film and/or digital aerial photography, aerial triangulation, stereo mapping compilation, orthophotography, land use/land cover interpretation, creation of horizontal and vertical control networks, ground control for support of photogrammetric and LiDAR mapping, topographic mapping using total stations or GPS; detailed planimetric surveys; profile and cross section surveys, instrumentation surveys, cadastral surveys, site and utility surveys, and geographic information system (GIS) services.

Project accomplishments include:

·       Cochiti Reservoir Historical Baseline Mapping – an award winning study to determine sediment deposition and distribution trends in the reservoir and upstream in the Rio Grande

·       Comprehensive Evaluation of Project Datums Compliance Surveys – performing geodetic control and compliance surveys for 70 projects within New Mexico, Colorado, and Texas to establish a consistent basis of elevation at each USACE flood control project

·       Las Conchas Post Fire LiDAR – providing data from the canyons to produce two-foot contour equivalent digital elevation data for geometry input to USACE hydraulic model programs for geomorphic and vegetation studies

·       Holloman Airforce Base Taxiway Extension and Aircraft Parking Survey and Mapping – performing topographic  and planimetric mapping  including utility data, digital terrain models for engineering design for demolition plans, site plans, roadway plan and profiles, grading and drainage plans, and utility plans and profiles for construction

Border Infrastructure Improvements Surveying and Mapping

The government needed to design and construct a border wall near Calexico, California. The Corps of Engineers contracted with VGW Geospatial to provide the field topographic/planimetric surveying and digital terrain model. The area included a two mile segment along the border that included 60 feet north and 10 feet south of the international boundary.

VGW Geospatial field surveyors used existing horizontal and vertical control to establish control points. The control monuments were set in an area out of the proposed construction disturbance area as these points will be utilized in the design, construction, and asbuilt phases. Surveyors obtained topographic and planimetric mapping data on the ground using both RTK/GPS and robotic total stations. Surveyors used a high rod to locate all features on the south side of the international boundary, and the surveying total station remained on the north side of the international boundary. 

VGW Geospatial provided electronic CAD files of the collection in MicroStation along with a Digial Terrain Model (DTM) of the topographic surveys. Random points, breakline points, and planimetric data was provided along with one-foot contours.