The link given for
The Washburn Tunnel at least mentions that it goes under the Ship Channel between Galena Park and Pasadena, but they don't give the actual street address.
Reading that link, I was surprised that while Ike swamped it, TS Allison didn't :o
Now, I have to ask,
why were you looking at that page in order to find that mistake? ;)
I was just looking at that area today, after reading about how Houston is implementing voluntary water-rationing. Their water-purification facilities are located right at the Washburn Tunnel. Following the aquaduct from lake Houston, I came across what seemed like a large pipe-manufacturing facility, as I recognized the layout of their yard. And looking at the limit of the image, I was right. What I didn't realize was that it was just a tiny company set a bit away from the massive one,
linked here. You'll have to zoom in, but all those dashed marks are actually rows of stacked pipe! And while some may be for processing plants, much of it is for pipelines, ranching in size from 2" up to 48" diameters. That's a lot of pipe!