Micro City (Memphis) with river (gaps filled)

EDIT: I thought i had filled all the gaps once i fixed the bridge pilings, but I just keep finding more - at least in my printing software with my current configuration. This is basically unprintable for me. Havent made a good one yet.

This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/0uHGWB3Owdm