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Commission approves order for 500‑foot culvert rehabilitation at Eldon B. Keith Memorial Field
Summary
CDM Smith presented a trenchless slip‑liner solution to rehabilitate a 500‑foot concrete box culvert under Keith Field; the commission required bank‑stabilization and bypass‑pumping plans, plus three years of monitoring, and voted to issue an order of conditions.
Engineers from CDM Smith described a plan to rehabilitate a failing reinforced‑concrete box culvert beneath Eldon B. Keith Memorial Field by installing a glass‑reinforced plastic slip liner pushed from the outlet upstream for about 500 feet, replacing the failing headwall, and stabilizing the outlet banks. The project team said liner sections arrive in lengthwise segments; engineers estimated installation of roughly 10 liner pieces per day (about 70 feet/day) under ideal conditions and noted bypass pumping and dewatering will be required.
Staff and commissioners asked for explicit bank stabilization measures and for a bypass‑pumping and fencing plan that can be reviewed and approved before construction. The commission added special conditions requiring submission and approval of a bypass plan, bank‑stabilization details and a three‑year monitoring program; the motion to issue an order of conditions passed by roll call. "If this project is a success, they can utilize this technology on other culverts in the city," the project lead said, and staff will require preconstruction submittals for bypass and stabilizing measures.
