Thanks

I didn’t do this survey alone. Thank you:

to my dive buddies, for the dives in the current, the safety, and the patience while I filmed every zebra mussel: Jean-Sébastien Fournier, Josianne Demers, Nicolas Pinsonneault, Julie Cardinal, Thierry Amar, Véronique Lisi, Michel Giroux and Dan Foster;
to DECOSTOP Outdoor Centre and its owner, Dan Foster, for the sponsorship and the support;
to Sylvain Marcotte, who designed the rig that carries the cameras;
to Nick Baets and Save Ontario Shipwrecks (Ottawa chapter), for the 1988 drawings of the lock that the site’s zones are based on.