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Buckner council approves change order after reed-bed contractor finds sandy liner material
Summary
Council approved change order number one for the reed-bed project after staff reported the on-site stockpile was sand rather than clay, requiring hauling clay 12 miles at an estimated extra cost of $40,000 and a check valve addition to prevent pump-station backups.
City staff updated the council on the reed-bed stormwater project and requested approval of a change order after the construction contractor encountered unanticipated site conditions.
Staff said the project team discovered power-line and force-main locations differed from the plans, requiring relocation of pipework and addition of a manhole. When crews poured the lift-station wall, groundwater and wet conditions caused the excavation to fill and crews spent several hours pumping the trench, prompting the installation of a check valve to prevent future backups of solids into the line.
The larger budget impact came when the team began placing the clay liner and determined the on-site stockpile was sandy rather than clay. Staff reported tests showed a nearby farmer’s excavated pond supplied acceptable clay but hauling the clay roughly 12 miles would add an estimated $40,000 in hauling and material cost, with other changes totaling about $14,000. Staff told the council they remained under the original overall project budget but asked permission to proceed to avoid delay.
The council moved to approve change order number one; the motion was seconded and carried by voice vote with no roll-call recorded.
Next steps: staff will authorize the clay haul, complete liner placement and continue project work under the approved change order.
