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County signs landfill financial‑assurance letter citing $195,002.75 near‑term closure cost

Custer County Board of County Commissioners · November 12, 2025
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Summary

County staff told commissioners the landfill’s total closure and 30‑year post‑closure estimate is $1,098,297, with a remaining estimated capacity closure cost of $195,002.75 if closed today; the board approved signing the financial‑assurance letter to state solid‑waste authorities.

Custer County commissioners voted to sign a financial‑assurance certification letter required by state solid‑waste regulators after staff presented closure and post‑closure cost estimates for the county landfill.

Solid waste staff explained the 2024 closure estimate and 30‑year post‑closure care calculations, saying the total estimate is $1,098,297 and that the current remaining estimated cost to close the landfill today is $195,002.75. Staff walked the board through what the closure cost covers — final cover layers, seeding and mulching, engineering and surveying, and long‑term monitoring — and noted the requirement to certify sufficient funds.

The presenter also noted an audit presentation omission that caused initial confusion about where the calculations appeared in the audit document; staff pointed to the page with the calculated number. Commissioners asked clarifying questions about the life expectancy of current cells (staff said the landfill has a 30‑year design life across phases and identified a remaining near‑term phase). The board moved and approved signing the letter; staff said the letter will be sent to the state solid‑waste financial assurance contact.