(1) If a drain improving any channel or watercourse in a district is on the line of any natural depression or watercourse which crosses any public highway where there is no bridge or culvert or opening in the highway sufficient to allow the flow of water in the drain as improved, the board shall give notice to the road commissioners or road engineer to construct or enlarge the bridge, culvert or opening to meet the improvement, stating the dimensions required. The road commissioners or engineer shall, within thirty (30) days from the time notice is served, make the improvement required.
(2) If they fail or refuse to do so, then the board shall construct or enlarge the bridge, culvert or opening at the expense of the county, and the fiscal court shall reimburse the board for the cost of the work. If the fiscal court refuses to reimburse the board, it may enforce their right of reimbursement in any court having jurisdiction.