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> Investigative Services
> Access Consulting
> Project Deliverables
> Client List
> Wind Energy Services
Technology Highlights
> Fiber-Optic Investigation
> Bridge and Truss Investigations
> Nondestructive Testing
> Guastavino Tile Ceilings, Domes and Vaults
> Tablet PC Annotation System (TPAS)
> Debris Net
> Shrinking Net
Project Profiles and Sample Drawings
> Religious Buildings
> Government and Institutional Buildings
> Academic Buildings
> Commercial and Residential Buildings
> Civil Structures
> Monuments and Sculptures
> Guastavino Projects
> All
Occoquan Dam
Fairfax, Virginia
Dam Manager
Fairfax County Water Authority
In collaboration with
Dam description
The Occoquan Reservoir is a 2,100-acre reservoir in northeast Virginia formed by the Occoquan Dam on the Occoquan River. Managed by the Fairfax County Water Authority, it provides an important water supply to surrounding settlements in northern Virginia, with an output of 17 million US gallons a day to 1.2 million people.
Scope of work
Project Overview
Fairfax, Virginia
Dam Manager
Fairfax County Water Authority
In collaboration with
Dam description
The Occoquan Reservoir is a 2,100-acre reservoir in northeast Virginia formed by the Occoquan Dam on the Occoquan River. Managed by the Fairfax County Water Authority, it provides an important water supply to surrounding settlements in northern Virginia, with an output of 17 million US gallons a day to 1.2 million people.
Scope of work
- Installed temporary rope access anchors to allow for the safe access of the dam face by all team members.
- Safely guided consultants to areas of interest on the dam spillway.
- Guided a ground penetrating radar (GPR) antenna along the surface of the spillway on a 2.5’ grid so that GPR data could be recorded.
- Worked with the Water Authority surveyor to record GPR path locations on the irregular dam spillway surface.
Project Overview
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Vertical Access was contracted to assist Olson Engineering with nondestructive evaluation at the Occoquan Dam.
An investigation of the dam’s north abutment (side spillway) was performed using industrial rope access.
Specialized footwear was worn to navigate safely on the slippery sloped concrete surface while guiding
ground penetrating radar (GPR) methodically along a grid on the structure to generate a map of the rebar size and
spacing in this portion of the dam. VA also assisted with the gathering of topographic survey data to be used to create a 3D model of the structure.
