Do not remove any existing multiple-pipe culverts from the Bridge Inventory File. The installation may already be in the prioritization process for repair or replacement, and the process should not be disrupted.

Make and maintain Bridge Records for multiple-pipe culverts providing the total installation exceeds the 20-ft length criterion and the distance between individual pipes does not exceed one-half the diameter of the smallest contiguous pipe. Note that there could be a many individual pipes and the spacing between the pipes will dictate if that series of pipes is 1, 2, or more individual structures.