| Location | Toronto, ON |
| Size/Type | 3500mm x 6000mm CMP arch, 3000mm CMP & RCP |
| Drain Type | Creekwater |
| Length | 700m |
| Features | Big |
| AOTU Rating |   |
| Discovered By | Angels of the Underground |
| First Documented Exploration | Siologen |
| Notes | |
|
AOTU Members present for exploration: Umbra & Rico Friends of AOTU present: none Photographs by: Umbra & Rico | |
 Start PicLens SlideShow | |
This giant half-CMP tunnel is a beautiful place to be in. Wonderful tree filtered light streams in from the outfall and gives the sand covered floor and metal roof a green glow. Continuing through the large arch, the pipe transitions into concrete coated CMP that presumably is RCP but not really. At only three-quarters of a kilometre in length, Tinnitus is over quickly but once exited at the infall, only a short walk away leads to Not So Tough Now and Concrete Jungle.
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