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Sioux City council approves change order for utilities field office after consultants find unstable soils and rubble
Summary
The City Council unanimously approved change order No. 2 to H. & R. Construction to complete remaining subgrade stabilization at the new utilities field office after soil testing showed high moisture and construction debris; consultants described stabilization options and unit prices, and staff said the building pad has passed recent compaction tests.
The Sioux City Council on a unanimous vote approved change order No. 2 to the contract with H. & R. Construction to complete remaining subgrade stabilization at the city’s new utilities field office building.
Mayor Robert E. Scott presented the item after staff reported that over‑excavation and proof‑rolling revealed higher moisture content and unstable soils beneath the building pad and surrounding paving. Utilities staff said an initial, time‑sensitive stabilization move of about $333,000 was authorized to protect soils before incoming rain, and the newly approved change order covers additional work identified once the site was opened.
Why it matters: consultants told the council the site is highly variable, with pockets of rubble…
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