The sidewalk along 13th (north side of the road) as you head west from Indiana Avenue has a lot of loose gravel on it. Looks like runoff from the power substation located right there.
In front of 1006 E 1st, there is a hole between the sidewalk and tree plot that I'm concerned may be quite large and have the potential to compromise the integrity of the sidewalk. It's not visible from the road - just when you're standing next to the tree in the tree plot there. It may not be a problem, but it might be a good idea to have someone take a look.