Infrastructure Engineers is a hybrid transportation engineering and commercial diving company in which underwater inspection is a core business, not a sideline endeavor. Our field-proven underwater inspection procedures provide a comprehensive, accurate, and complete assessment of any structure, including bridges, culverts, waterfront facilities, water control structures, and water tank interiors. We have vast experience performing in complex diving conditions such as limited visibility, confined spaces, deep waterways, and fast currents. Each inspection team is comprised of Association of Diving Contractors International (ADCI)-certified commercial divers, who follow ADCI guidelines for diving safety, as well as those set forth by OSHA. Our underwater inspection services, provided by NBIS-qualified team leaders and inspectors, include the following:
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Newnan Street/Hubbard Street
over Hogans Creek, Florida DOT District Two
Infrastructure Engineers provided a PD&E study for a historic 1929 bridge replacement on Newnan/Hubbard Street over Hogans Creek in Jacksonville, Florida. This study, in accordance with NEPA requirements, included engineering, public involvement, and environmental, historical, social/cultural, and human impact analysis. The firm is now designing the approved alternative to replace the bridge, while leaving the existing architectural historic railing in place.
Infrastructure Engineers has been selected for three term agreement contracts for the underwater inspection of marine and freshwater structures, including bridges and ferry terminals in locations ranging from the west end of the Aleutians, the Arctic Circle, and the southern Inside Passage in Alaska. We provided all transportation, labor, materials, diving equipment, photographic equipment, traffic control, debris removal, and all other incidentals necessary to complete the inspections and reports. The project includes the detection of damaged structure elements, section loss, timber decay or attack by marine borers, scour, and undermining of footings or concrete walls.
Infrastructure Engineers has performed three cycles of underwater bridge inspections for 90+ bridges statewide, using both commercial SCUBA and surface-supplied air diving systems. Each cycle included three bridges crossing the Blue Mesa Reservoir at depths in excess of 100 ft. The inspections at Blue Mesa were conducted using a hot water diving system and a recompression chamber, with the assistance of acoustic scanning. The remaining bridges included timber, steel, and concrete construction, many requiring inspection in high flow.
For three consecutive contracts, Infrastructure Engineers has performed 350+ underwater bridge inspections throughout South Carolina. Responsibilities have included the investigation, evaluation, and recommendation of repairs to the bridges’ substructure units (located in the water). Bridges range in size from small, completely submerged box culverts to large, river-crossing trusses and cable stays. Acoustic imaging was used on bridges over the Cooper and Wando Rivers to document scour for repair recommendations.
Since 2003 under four consecutive contracts, Infrastructure Engineers has provided underwater inspection of bridges and ferry terminals statewide. In areas with salt water and/or brackish water, a minimum of 10% of each substructure element is cleaned of marine growth. The underwater assessments included inspection, analysis of existing conditions, engineering calculations and drawings, color photography, recommendations for follow-up action, and documentation of findings.
Under three consecutive contracts, Infrastructure Engineers has provided underwater inspections for locks, spillways, pump stations, weirs, and culverts. Surface-supplied air diving systems were used to conduct the inspections. The project included the preparation of reports that documented the inspection findings, observed deficiencies, and recommendations for repairs with cost estimates. Underwater video of the inspections was also provided.
Infrastructure Engineers was selected to perform statewide underwater bridge inspections; inspection of confined space and other similar structures; and selected routine and in-depth inspections of state and town bridges. Both surface-supplied air and commercial SCUBA diving systems are used for the underwater inspections. Sounding grids are performed for scour critical bridges. Non-destructive testing is performed as needed. Each inspection requires documentation of structural conditions in an inspection report prepared in the SMS database, including overall condition, a location map, updated CADD sketches, color photographs, and maintenance recommendations. Additional documentation includes daily logs, weekly schedules, maintenance memorandums, monthly progress reports, bathymetric surveys, and acoustic imaging.