Wheatley_Reservoir_Bathy_Contours_NAVD88_-260817.pdf

This is a bathymetric survey document prepared for Charles County, Maryland, detailing the underwater topography and sediment conditions of Wheatley Reservoir. The document presents contour maps and depth measurements of the reservoir basin, with particular emphasis on the northern and western cove areas where bathymetric and sub-bottom profiling surveys conducted in late 2024 identified significant sediment accumulation. The maps utilize NAVD88 (North American Vertical Datum of 1988) as the vertical reference standard and provide the technical foundation for planning the wet dredging, hauling, and sediment disposal services that the County Commissioners of Charles County are soliciting through sealed bids from qualified dredging firms. The survey data enables contractors to assess project scope, sediment volumes, and operational requirements for the initial dredging event scheduled to occur within Gilbert Run Park at 13140 Charles Street, Charlotte Hall, Maryland 20622, while accommodating park accessibility and activities.

The bathymetric contours and depth information presented in this survey document are essential for bidders to develop accurate cost estimates for dredging services on a per-cubic-yard basis and to plan equipment deployment and logistics for sediment removal and disposal. Contractors are encouraged to review all project documents and drawings and to conduct site visits during normal business hours prior to submitting bids, enabling them to validate survey findings and assess site-specific conditions that may affect project execution, scheduling, and overall feasibility.