Roberts Tunnel / Dillion Reservoir ROV
One of Ballard Diving and Salvages inspection class ROV systems was mobilized to Dillion Reservoir in Colorado to perform a long haul tunnel inspection. The work scope included highly accurate three dimensional positioning to inspect a section of tunnel thought to have failed and caused a subsidence in the reservoir bottom. During the inspection the ROV recovered sediment samples and salvaged other debris located in the invert of the tunnel. Dual imaging sonar was used to map fractures and accurately dimension the tunnel system.
