As a subconsultant on this project for the U.S. Army Corps of Engineers (USACE), Pittsburgh District, PRIME assisted DLZ by providing a detailed structural analysis and design of the machinery hoist support beams, monorail hoist systems, and the building frames and roof systems. Foundation concrete repair sketches for the machinery support beams were developed. PRIME prepared material quantity estimates for all components of the machinery houses, machinery support beams, elevated observation decks, and access ramps. All building and framing connections were specified and detailed accordingly. PRIME completed the design of a waterproof bellow system to provide access through roofs for each hydraulic cylinder and the design for a brush system for the cylinders to keep cold air and birds out. PRIME also provided the design of demolition work for all seven existing machinery houses.

PRIME’s subconsultant, DLZ, prepared contract documents for the Back Channel Rehabilitation of the Emsworth Locks and Dam on the Ohio River. The work involved the replacement of six vertical lift gates, operating machinery, electrical systems, and controls. DLZ performed fieldwork and prepared documents for the machinery houses and lightning protection.

Additionally, CADD was outsourced to DLZ to provide Microstation drawings, back-checking and quality control of Corps-prepared markups for contract documents, reference drawings (as-builts), reference shop drawings related to gate construction, and concrete pier modifications. To ensure constructability, DLZ developed a conceptual plan for the delivery of the six lift gates and two emergency bulkheads to the Emsworth back channel including clearance restrictions at an existing upstream railroad bridge, low pool elevations, and shallow pool depths. The conceptual plan also addressed cribbing, rigging, a critical lift plan, crane requirements, barge requirements, mooring requirements, and gate placement procedures.

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