Agenda - Council - 10/14/2025 - Laserfiche WebLink

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:101E2s® www.ae2s.com Proposal No. 048 — Remote Actuator Hand Stations: During construction coordination, it was discovered that the valve supplier did not account for the eighteen (18) remote actuator hand stations shown on the electrical drawings. These hand stations allow operators to perform local manual control or check valve status from a more accessible location, rather than needing to access the elevated actuators directly. For a facility with this configuration, they provide significant safety and operational benefits. The Contractor has requested reimbursement only for the material cost of the remote actuator hand stations, with no markup. The installation costs are already covered under the original bid price. AE2S coordinated with City operations staff to review the need for these devices, and the consensus was that twelve (12) of the original eighteen (18) should be provided to maintain safe and flexible operation. This proposal includes only the material cost of the twelve (12) hand stations, without Contractor markup. A deduct will be applied for the six (6) removed units to account for the reduced conduit and installation effort. AE2S supports this change as it adds long-term operational value and safety. If fully included in the original bid by the supplier, total project cost would likely have been higher due to vendor and contractor markups Proposal No. 049 — Valve Actuator Voltage: During construction, it was identified that the valve actuators supplied by the equipment vendor are configured for 120V operation, while the design had planned for 480V power. Fortunately, the electrician discovered the discrepancy early before starting to pull wire, allowing adjustments to be made before significant removal or rework. AE2S worked closely with the Contractor to identify the most cost-effective and practical solution. The proposed change includes a new transformer and 120V panel to support the actuators. Since the electrical room is fully utilized and at capacity, the new panel is planned to be located on the north wall of the pipe gallery. This approach attains minimal impact and maintains consistency with the existing conduit layout. Additionally, the plate settler actuators will be routed to a 120V panel in the electrical room, and the actuator in the blower room will be connected to a nearby circuit. This proposal includes all required labor, materials, and equipment for the additional conduit, transformer, panelboard, and junction box modifications. Because this work is required for system startup, prompt approval will help minimize delays and allow efficient material procurement. If identified earlier, a similar modification would have been implemented, and the corresponding installation cost would have been applied to the project. The Contractor has also requested a 26-day extension to the Substantial Completion date to perform this work. It is recommended that the City proceed with approving the time -sensitive cost -related impacts but deny the requested time extension. Proposal No. 050 — Sludge Lines Additional Drop Pipe: During field review of the sludge room (Room 109), AE2S and City staff noted that the large vertical drop from the plate settler sludge effluent lines could result in splashing and additional cleaning requirements during operation. To assist in mess management and streamline operation of this space, AE2S recommends modifying the piping by adding 90-degree bends and short vertical runs to discharge closer to the sludge Advanced Engineering and Environmental Services, Inc. 6901 East Fish Lake Road, Suite 184 • Water Tower Place Business Center • Maple Grove, MN 55369 • 763-463-5036