This location I've known about my entire life but never inspected close enough to see if entry was possible. Back in 2010 and again in 2014 the gate was opened. When inside, I found graffiti dated 2010, although some of it may be newer. As far as I know no other excursions have been made since.
The entry/gate (if this too much info about PoE I can edit/remove)
Entry gap (less than a foot of clearance, barely made it in)
Tunnel entry and transition (starts over 6ft then goes to 6ft or a little under)
Multiple ladders to manhole (WARNING: many rungs are rusted through and not reliable)
Although this is a storm drain there was still lots of poop (dog? human? ratman?). Some had peculiar mold growing on it that made me initially think there was a dismembered furby
Nothing of interest until the end of the tunnel which ends in a floodgate of some sort
A close up of the actual gate
Ladder leading to balcony and manhole
Manhole leads to a small house which has the floodgate controls in it
I eventually backtracked to a manhole that had less spiders and centipedes that came out into the street
Overall rating pretty boring but a good entry into tunnel exploration