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Independence outlines water, sewer capital improvements including Spring Branch complex and piping upgrades
Summary
City staff reviewed the fiscal-year 2025–26 capital improvement projects for sanitary and water systems, highlighting pipe lining, a multi‑year Spring Branch Garage Complex, a $2 million sludge-thickening upgrade and a ramp-up in water main replacement.
City municipal services staff reviewed proposed fiscal-year 2025–26 capital improvements for water and sewer on March 20, describing multi-year rehabilitation and replacement projects and several significant cost increases for building projects.
Staff described ongoing annual programs — $500,000 for trenchless lining and $250,000 for neighborhood sewer projects — that preserve system life and improve bidding outcomes by packaging small jobs. “Trenchless Tech is simply, our program that we use to line our sanitary mains. We line them to extend their useful life,” Municipal Services staff said.
Planned and discussed projects included: • Upper Adair interceptor: $1 million total, split across two years (roughly $500,000 in 2025–26 and $500,000 the following year) to replace and add parallel sanitary piping under I‑70 because of known capacity limits. • Spring Branch Garage Complex: a multi‑fund vertical construction project to consolidate public works operations. Staff said the original engineer’s estimate was about $16 million and the current estimate is near $46 million. • Golden Acres and 204th & Scott sanitation relocations: moving mains that run under structures to reduce maintenance and risk. • Treatment-plant rehab: a $2 million project to replace aging dissolved-air flotation (DAF) sludge-thickening units; annual piping rehabilitation funded at $200,000 per year; pump and valve replacements at Rock Creek Pump Station; and VFD (variable frequency drive) replacements at pump stations.
On the water side, staff highlighted a continuing main replacement program that targets replacing at least 1% of the distribution system annually and plans to budget roughly $2 million for main replacement in 2025–26. Staff also listed a year‑one $1 million line for future production wells and several Courtney Bend plant upgrades, including high-service pump overhauls.
Staff flagged a federal regulatory change — a new lead-and-copper rule — that could obligate the city to replace private service lines all the way to residences. “That rule mandates that the city is on the hook for replacing service lines. ... Very, very, very costly,” staff said, noting a 2025–26 placeholder of $160,000 that could scale to $1 million annually if the rule remains in force.
Why it matters: the capital plan lists priorities for utility reliability and replacement of aging infrastructure; some projects carry steep cost increases and regulatory exposure that could affect future budgets and rates.
What comes next: staff will continue to refine bid documents and sequencing of multi‑year projects and will present the plan as part of the city’s broader CIP process.
