Between 811 and 815 N Jackson, the sidewalk across the alley is . . . gone?? There's just a grassy gap there now. It's surely the city's responsibility to replace it since it across the alley.
Between 925 and 927 W Jackson, there's a sidewalk across the alley that's made of asphalt or something. It's down at a different level from the surrounding sidewalk and is a tripping hazard. Because it's across the alley, it's the city's responsibility to repair.
The bit of sidewalk across the alley is made of bricks that are at a significantly lower level than the surrounding sidewalk and therefore is a tripping hazard. Because it's in front of an alley, I suppose it's the city's responsibility to upgrade the bit to something safer, like has been done on the opposite side of the street.
Blocking traffic with nobody directing traffic