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Board approves construction change orders for Port Washington water treatment plant; staff outlines major valve and SCADA adjustments
Summary
Board approved a package of construction change orders for the city’s water treatment plant project, including addition of about 35 automated valves, SCADA allowance adjustments, and credits from alternative foundation methods that reduced overall net cost impact.
The Port Washington Board of Public Works approved a set of construction change orders for the water treatment plant project that included addition of automated valves, a revision to the SCADA upgrade allowance, and net credits tied to an alternative foundation installation.
City staff said the mechanical contractor identified valves not included in the original design; the project added roughly 35 automated valves to improve isolation and backwash operations. Staff estimated that valves represented a large item in the change-order package, about $191,000. The original SCADA allowance was $1,100,000; Energenics bid the SCADA work at about $900,000, producing roughly a $200,000 credit against the allowance, staff said. A separate valve allowance originally set at $1,300,000 was reported as coming in at $1,100,000 excluding the newly added valves.
Staff said the project received a $200,000 credit when the contractor (CD Smith) proposed an alternative to digging foundations, using a different installation method (GOPure installation), which came in significantly less than the original foundation cost. After applying credits and allowances, staff said the net impact of the change orders is approximately a $65,000 adjustment that remains within credits from earlier items and does not exhaust the project contingency. Staff said the city has not yet tapped the five-percent contingency (about $900,000) and that they are continuing to work through remaining items with CD Smith.
Board members asked for clarification about who ‘‘they’’ referred to during the project process; staff explained SEH was the engineer of record and August Winters was the mechanical contractor that reviewed pump and valve needs during construction. Alderman Tierney moved approval of the recommended change orders; Mr. Haley seconded. The motion carried on a voice vote.
Staff noted the garage expansion that had been discussed previously is currently on hold while the city assesses future plant capacity in light of potential increased usage such as the proposed data center, and that some storage needs may be met by short‑term rental until a final decision about expansion is reached.
The board’s action approved the change orders as presented; staff will return with any future individual change orders for separate approval.
