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Public works: Sienna Hills chip‑seal issues traced to material and application; city to increase sweeping and consider fog coat
Summary
Public works acknowledged loose rock from a 2024 chip‑seal operation, attributed to insufficient binder application and substandard aggregate. City crews will increase sweeping in affected areas; staff outlined a fog‑coating/further work estimate and options for limited corrective work.
Caldwell — City Public Works staff addressed resident complaints about loose rock after a 2024 chip‑seal operation in Sienna Hills and surrounding streets. Staff told council an analysis found two contributing problems: a lower quantity of asphalt emulsion applied during the operation and a batch of aggregate that lacked the fracture characteristics necessary to embed…
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