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Board approves GMP 2 for Dr. Paul Phillips plant expansion; staff and contractor describe tariff mitigation steps
Summary
The board approved GMP 2 (about $19.15 million) for critical site and early work at the Dr. Paul Phillips Water Purification Plant, increasing the overall contract ceiling to about $29.38 million; discussion centered on redundancy, reclaimed-water improvements, chemical changes for safety and procurement allowances to mitigate tariff risk.
Rick Schaeffer of Water Utilities presented the GMP 2 amendment for work including a new filter process building, a rapid-mix vault, below-grade site work and piping needed before long-lead equipment arrives. He said the package will improve raw-water redundancy (adding a new 36-inch parallel line to the existing 24-inch), add an internal reclaimed-water loop to capture backwash and reduce counts against the city’s reclaimed-water rights, and eliminate gaseous ammonia in favor of liquid chemicals where possible for safety.
Schaeffer presented a GMP 2 guaranteed maximum price of $19,148,956.92 that would increase total contract authority to not exceed $29,375,580.25. The Weber Construction representative said the contractor pre-purchased underground piping for GMP 2 to lock pricing ahead of tariff changes, explaining "we issued that purchase order, and we locked that pricing in, and our supplier locked the pricing in." Board members questioned whether allowances would give staff latitude to purchase ahead of bid openings; staff said allowances provide authority to place opportunistic orders up to the approved amounts and that GMP 2 as presented carries no tariff exposure to the city, while GMP 3–5 may have escalatory risk.
