What else is in the Trinity River?

And then I saw the source of the flood. 

Water shooting out of a Fort Worth Sanitary Sewer manhole.

That explained the malodorousness.

Apparently this manhole has been spewing sewer water for over a week, flowing into Tandy Creek, and then the Trinity River.

Now, it is well known that untreated sewer water flowing into the Trinity River is no big deal in this part of the planet. Come summer, many of the locals think nothing of going inner tubing in the Trinity River's untreated sewer water.