MMSD Conveyance Gate Controls


Kapur, as part of a joint project team, performed design
and prepared contract documents (specifications and
plans), along with a construction cost estimate for bidding
of this Gate Rehabilitation project.

Sustainability of these chambers, and limiting the need for
future rehabilitation, was addressed in these
improvements. All hydraulic piping will be replaced with
stainless steel pipe, fittings, and valves, as well as all
exposed metals to be cleaned, prepared, and treated with
protective coatings. Hydraulic accumulators will be
removed, cleaned, and recoated as well before
reinstallation. Plans and specifications require inspection
of gates as work begins and provide a timeframe for
detailed shop examination before deciding if gates will be
rehabilitated or replaced. If the results of the shop
examination indicate the need for extensive repairs, the components will be replaced subject to the District for approval.
Kapur was responsible for delivery of camera-ready documents, and met project schedule and budget goals.

The project team performed rehabilitation design and on-site inspections for multiple interceptor gates as part of this conveyance system evaluation and design project. Plans, specifications, and bidding documents and construction estimates were prepared as part of the project.

Limiting the need for future rehabilitation was a key consideration of these improvements. Many existing hydraulic gate operators and piping were replaced with new equipment including stainless steel pipe, fittings, valves, and personnel access
grating and supports. Selected gate hydraulic accumulators were removed and rehabilitated along with replacement of electrical components that had deteriorated over time due to the moist conditions within the structures. Another important project consideration was operational access and constraints for performing work at each of the project site.

A key component of the evaluation and design work was the inspection of equipment systems. The inspection was followed by workshops with the District and Veolia to review recommendations regarding equipment system replacement or rehabilitation. These workshops enabled the Symbiont team to make more efficient project decisions and provide better design options to the District.