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Council authorizes $453,349 change order to fix Nitroblast pump-room issues; work funded from waterpark capital
Summary
Council approved Change Order No. 4 for $453,349.52 to reconfigure pumps and electrical/plumbing in the NRH2O Nitroblast pump room after testing found undersized pumps and inadequate pressure; replacement pumps and VFDs have long lead times and work will move the project toward a 2026 season opening. Staff said waterpark funds — not property tax — will pay for the work.
City staff told council that final testing of the Nitroblast attraction revealed hydraulic deficiencies caused by undersized pumps and that the engineering consultant revised the pump‑room design to resolve the issue.
Adrienne Caperni (speaker 22) explained the revised layout requires relocating existing 75‑hp pumps, adding two new 125‑hp pumps, and reconfiguring piping, variable frequency drives (VFDs) and electrical systems to achieve the operating pressures needed for boosters 1 and 2. Long lead times for pumps and VFDs (60–90 days) precluded opening during the 2025 season.
The requested change order (No. 4) totals $453,349.52 and covers plumbing and electrical modifications needed to complete the pump‑room redesign. Adrienne said immediate funding is available through the Waterpark capital project budget transfer and reiterated that NRH2O capital and operations are funded by waterpark revenues (no property‑tax support). Council asked whether there would be recovery or claims against the design engineer; staff said the city is pursuing that review but recommended moving forward to complete the work and prepare for the 2026 season.
Council voted to authorize the city manager to execute Change Order No. 4 with CGC General Contractors, Inc., for $453,349.52.
