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Main Street testing, casing-pipe purchase and spoils pile discussed as city readies utility work
Summary
Staff told council that Main Street core testing of asphalt and base is underway, that the city can acquire a spoils pile and that buying casing pipe now would help schedule upcoming utility work; railroad coordination and flagging costs are expected
City staff updated the council on Main Street reconstruction and related utility work, reporting that core samples, compaction (penetrometer) tests and asphalt mix testing are in progress. Staff said the subsurface foundation (gravel base) appears generally sound but testing has flagged thickness and pavement-quality issues that will guide next steps.
Key points: - Testing: Engineers are taking cores and performing compaction and mix tests to confirm whether the asphalt and base meet specifications; staff expect a final report at the next meeting to inform remedies. - Casing pipe purchase: Staff recommended ordering casing pipe while materials are available to avoid shipping delays; council agreed it would be prudent to have pipe on site for the Main Street and Second East projects. - Railroad coordination and traffic control: Work near the tracks will require railroad flaggers and observers; staff noted typical railroad flagger/observer costs around $1,000 per day and added that the contractor estimates 60 feet of casing per day to push through when active work begins. - Spoils/fines material: The city now has access to a state-provided spoils pile (crushing fines) estimated at roughly 6,000–7,000 yards; staff said the two projects together will need about 15,000 yards and are pursuing additional sources.
Why it matters: The testing results will determine whether surface remediation is needed beyond immediate repairs. Purchasing casing pipe ahead of time could reduce delays once construction starts, but costs and storage must be managed. Railroad permits and traffic control add scheduling and cost constraints.
Next steps: Staff will obtain the final materials-and-core report and provide cost estimates for casing and coordination with the railroad; staff also asked council whether to authorize purchase of casing pipe now and council indicated support for buying pipe to avoid schedule delays.
