Allen Creek became quite polluted because of the industrial activity and open sewers located along its banks. In the 1920s, after floods sent filthy water into nearby neighborhoods, residents petitioned the city to inter the creek. Since 1926, the only place where you can see the Allen Creek is where its cement culvert empties into the Huron River.
One good thing about the drought we're in is that water levels in the Huron River and Allen Creek have been quite low. I took this as a sign from on high that I should go poking around inside Allen Creek. Here are some pictures:
The River is the lowest I have seen it in my life. This makes it easier to approach the mouth of Allen Creek. There are some pretty deep spots still, and reports of northern pike.
Inside the creek's culvert it's quite dark. The culvert starts out about 4m tall and about as wide. The water was about ankle deep but was flowing quite briskly.
As my exploring partner and I continued up the tunnel, the ceiling and floor became more rounded.
We spotted a few solitary bats clinging to the top of the tunnel.
There are numerous smaller tunnels along the walls of Allen Creek. We found a crayfish (one of many in the creek) chilling out in this little tributary. We also found some raccoon footprints around the mouth of the creek. Maybe they were snacking on the crayfish.
UPDATE: The article has been edited to reflect the proper spelling of Allen Creek.