Treasure County to add riprap and a short detour to Gibson Road bridge project, manager says

Adam, the county project lead, outlined two change orders for the Gibson Road bridge project that he said would improve durability and keep the schedule moving.

"What we have on that is a $15,000 change order as far as the rip rap goes," Adam said, describing class‑1 riprap to protect the bridge approaches. He then described a proposed temporary detour built with three 18‑inch culverts and a 14‑foot single‑lane alignment; the contractor quoted about $9,000 for that work.

The changes increase the total project cost to roughly $330,000 from an original construction budget in the $301,000–$302,000 range. Adam told the commissioners the project retains about $21,000 in remaining funds after adding the two change orders and blade runners, and he recommended using that contingency to blade and finish Gibson Road at project completion.

Commissioners asked about contingencies and schedule impacts; Adam said the contractor requested an additional seven calendar days to accommodate the extra work, but he still expected the bridge abutments and riprap to be in place by April 1 if weather cooperates. He said he would have the contractor sign the change‑order paperwork and return it to the county for signatures.

No roll‑call vote was recorded on the change orders in the transcript; commissioners voiced acceptance and directed staff to complete the signature and coordination steps. The board also discussed mobilization timing and the county’s plan to supply culverts and coordinate hauling.

Next steps: county staff will bring signed change orders back for county signature and coordinate with the contractor and road department on the detour work and mobilization window.