In case anyone uses the search function to find the Louisville field office.
The address is 411 S 4th street, suite 200, Louisville KY. It is in the 4th street live area.
Best way to go is to park in the '4th street live' parking garage on 5th st. We paid 6 dollars for 2 hours. Park on lvl 3. Then exit the building on the 4th street side. Make sure to exit on level 3. Once out of the building, you should come out on the 2nd story walkway above 4th street.
Keep left, there is an airbridge across the street. This airbridge leads straight to the uscis office.
If you come from street level, there is a red staircase that leads straight up to the office.