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Public works warns of up to $600 million in deferred infrastructure needs; council asked staff to model levy-override options
Summary
Public works and water staff told the City Council that aging water, irrigation and sewer systems — plus regulatory testing obligations and rising external contract costs — create near-term deferred needs of roughly $362 million and combined infrastructure needs approaching $600 million; staff were asked to model rate, impact-fee, and levy-override options for council consideration.
Tom Points, senior public works director, and John Spencer, water director, presented a wide-ranging capital and staffing briefing to the council, warning that Nampa faces large deferred-maintenance and upgrade costs across water, irrigation and wastewater systems.
Spencer said the city maintains about $2 billion in water-related infrastructure, including roughly 1,200 miles of pipe, 27,000 valves and about 6,500 hydrants. He outlined a pipe-age analysis: roughly 40 miles of domestic pipe are 50–70 years old (estimated replacement cost roughly $1.65 million per mile) and the irrigation system has about 18.42 miles over 50 years (estimated ~$1.3 million per mile). He said an additional 72 miles of domestic pipe and 77 miles of irrigation pipe will pass the 50-year mark in the next five years.
On regulatory and contract-driven costs, staff said a reworked contract with the Nampa-Meridian Irrigation District could raise annual department costs by roughly $300,000. Staff also listed expected testing and compliance expenses: ongoing PFAS monitoring (~$22,000/year), lead-and-copper rule work (~$6,000/year), and a 10-year program to evaluate ~8,000 unknown customer-side service lines that staff estimated would cost about $175,000/year if ~800 lines are assessed per year.
On wastewater, water-renewal staff described an in-house cured-in-place (CIPP) lining crew that could deliver 3–5 miles of lining per year for a similar or lower net cost compared with contractor work (staff cited roughly $1.5 million/year previously spent on contractors for 1–2 miles). Major capital projects named included the headworks project (total cost ~$44 million, anticipated completion 2028) and the Nampa Water Garden (EPA/IDEQ grants plus private donations under discussion).
Tom Points presented consolidated deferred-maintenance estimates that staff described as a worst-case age-and-risk analysis: about $362 million in near-term deferred needs within a 5-year window and combined infrastructure needs on the order of $600 million when broader assets are tallied. Staff recommended further master planning and prioritization to refine that number.
For funding, staff discussed user-rate adjustments, impact-fee reviews, a possible transportation registration fee, and a permanent levy override as options. Councilmember discussion focused on timing for a ballot measure (Sept. 4 is the deadline to place a measure on the November ballot) and asked staff to model a permanent levy override example (council asked Doug and finance to show the fiscal impact of $50 million-per-year permanent override as a starting point). No formal motions or votes were taken at the meeting.
