TYLin developed plans and contract documents for the rehabilitation of Movable Dam 9 at Lock E-13 on the Mohawk River/Erie Canal in Randall, New York.
Dam 9 consists of two 186.5-foot steel trusses supporting 15 vertical lift gates. Constructed in 1914 with modifications added in 1924, the dam had experienced severe deterioration. Remediation was required for the structural steel superstructure and gates, as well as the substructure units and concrete aprons.
As large cofferdams were employed to dewater each span for construction, a detailed hydraulic analysis of the cofferdam impacts was also required as part of the design package.
In addition to the required structural repairs, the project included the investigation of hazardous waste and contaminated materials (HWCM), asbestos, lead, and impacts to threatened and endangered wildlife species.
- Rehabilitation of the mechanical components and direct current (DC) electrical system were included in the project.
- Barge-mounted drilling rigs were used to perform geotechnical investigations.
- Rehabilitation and inspection
- Conditions assessment
- Seismic analysis
- Construction inspection
- Environmental services
- Dam safety analysis
- Structural engineering
- Construction engineering
- Mechanical, electrical and control systems
- Gantries, cranes and special lifting fixtures
- Construction documents