Caloosahatchee River C-43 Reservoir Construction Survey & Monitoring

The Caloosahatchee River (C-43) West Basin Storage Reservoir Project is for the construction of a dam created from a two-cell reservoir covering approximately 9,000 acres with a total storage capacity of approximately 170,000 acre-fee.

Approximately 16.3 miles of perimeter dam and 3 miles of separator dam are part of the construction. T2 Utility Engineers was retained as a subconsultant to provide baseline surveying data and expertise as well as UAV (drone) aerial services to independently verify the quality and progress of the construction contractor and to provide monitoring information.
In order to provide independent reviews and checks, on-call surveying services will be required. To accomplish this, Pickett and Associates, Inc. (consultant) is serving as the lead coordinator of surveying and mapping services with the District that includes field survey activities, control surveys, UAV mapping, manned aircraft aerial mapping, 3D surface modeling, quantity/volume computations, and GIS compatible deliverables. Pickett subcontracted with T2 Utility Engineers providing field survey and UAV data collection for the first year of the project, including:
  • Establish a baseline LiDAR mapping and imagery for future construction activity; signed and sealed professional survey report, with digital images / horizontal and vertical position for each target point.
  • Dam foundation topographic surveys as construction contractor completes excavation to prepare the foundation of the proposed dam. Each 500’ segment will be inspected and surveyed as completed, prior to filling the dam. Topo elevations showing 3D digital surface will be completed using UAV photogrammetric mapping technology, stored as a backup file. The quality control team will verify the segment foundation area meets or exceeds the design dam footprint requirements.
  • Quarterly topographic and volume survey aerial target control for fixed-wing aircraft and LiDAR/digital imagery being completed by Pickett and Associates. Information is used to compute the overall volume of material in the dam foodprint for one year.


Picket and Associates

Project Owner:

South Florida Water Management District (SFWMD)







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