I was wondering where I can find maps of culverts that runs under interstates?
I'm in Indiana. I wrote an email to INDOT (Indiana Department of Transportation) and they said they don't have such information.
I searched Indiana Map Atlas and somehow wasn't sure if culverts were related to hydrology maps?
Like, canal, ditches, connectors, drainage?
They don't have a map specifically associated with "culverts".
Does anyone have an idea about it?