Commencement Bay
Deep Bay Marine Field Station was created in 2011.
As much as 600 ft deep
Tacoma, Washington fronts on a portion of the southern part of Puget Sound known as Commencement Bay.
Because the last answer was so incredibly ridiculous (54674582365837 feet deep...really?...really??), I trolled Wikipedia and a couple other sites to figure out that the bay averages about 650 ft. deep. The Monterey Submarine Canyon is about 6000 ft. deep. There.
fjord
The Hudson Bay.
Commencement is when people graduate.
It's about 50-60 ft deep a-hole
The SF bay is about 25 ft to 50 ft deep at average depths, and up to 100 ft deep at most.Most of the bay is fifty feet (fifteen meters) deep, although, there are some areas of the bay that are up to one hundred feet (thirty meters) deep.
The Professor's Commencement was created in 1902.
Commencement - unofficial - was created in 1999.