Thirty days after the receipt by the railroad of the completed crossing application, the fee, and certificate of insurance, the utility may commence the construction of the crossing, unless the railroad notifies the utility in writing that the proposed crossing is a serious threat to the safe operations of the railroad or to the current use of the railroad right-of-way. In all other instances the utility shall be deemed to have authorization to commence construction of the facility.
SDCL 49-16A-100.4