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Council approves pond-dredging contract after staff and council questioned steep cost estimates
Summary
Council approved a contract for as-needed pond dredging, but members expressed surprise at higher-than-expected estimates for particular ponds; staff said older quotes were for smaller scopes and changes in moisture content can materially increase hauling costs.
Keller City Council on March 18 approved a contract with Enviro Dredge for as-needed pond-dredging services, but several council members and staff flagged higher-than-expected cost estimates for specific ponds.
Council discussion focused on the estimate for a Boardland-area pond and similar sites. One council member observed the price looked "a far cry from what we thought when we went into this thing," and staff explained the older cost basis was for a smaller scope and dryer material. A staff member told the council that for some pond sites updated mobilization and hauling estimates approached roughly $700,000 for a single pond depending on whether the spoils must be hauled while wet.
Nut graf: The contract is a citywide as-needed procurement through an interlocal purchasing co-op. While the agreement gives the city flexibility to task the contractor on specific ponds, staff and council said several factors —hiefly the moisture content of dredged material and the distance to suitable offload sites rive wide cost variance and warrant close project-level oversight.
Key details from the discussion - Purchase mechanism: Interlocal cooperative procurement with Enviro Dredge (New Summerfield) to provide pond dredging and related services on an as-needed basis. - Cost variance drivers: Staff said the original estimate was based on older, smaller-size quotes; when re-evaluated for the targeted Boardland pond the estimate increased substantially because wet material weighs more and hauling costs rise; drying the material before hauling reduces cost. - Budget context: Staff noted previous Elm Street project line items and fund allocations that were intended in part to cover pond dredging but that costs have increased compared with earlier assumptions.
What council decided: Council approved the as-needed contract so staff can proceed with task orders. Council asked staff to provide clearer project-level cost estimates when specific pond work is authorized and to identify funding sources or required budget amendments for any large task orders.
Ending: Public-works staff will issue task orders under the cooperative contract as bids and site assessments are completed; the council asked that staff return detailed cost estimates for any task order expected to exceed routine maintenance amounts.
