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Board OKs resolution to amend Waldo Road zoning condition; engineering review required before development
Summary
Missoula County commissioners voted to adopt a resolution of intent to amend a zoning condition at 9772 Waldo Road that was imposed after a 2019 rain‑on‑snow sheet‑flow event. The amendment keeps a prohibition on basements and requires engineered stormwater plans that address a 100‑year rain‑on‑frozen‑ground scenario before permits are issued.
Missoula County commissioners on March 3 approved a resolution of intent to amend a special zoning condition tied to Lot 1, Denbiker Subdivision, at 9772 Waldo Road. The condition arises from a severe 2019 rain‑on‑snow event that produced sheet‑flow drainage in the Waldo Road/Highway 93 area.
Planner and floodplain administrator Matt Heimel told the board the property is in a commercial center zoning district but carries a legacy condition: any development must construct the lowest floor and utilities at least 2 feet above the highest adjacent grade and basements were previously prohibited. The applicant hired Newfields to complete a hydrologic analysis to quantify peak discharges from the off‑site drainage basin. Heimel summarized the study’s modeled results: a standard 100‑year,…
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