I think that generating power from tidal currents has some great potential in the PNW and BC. It is not a panacea, but there is a huge amount of unused energy there.
The city of Tacoma has had a study proposal ready to go since 2007 but has been put on hold due to environmental, engineering, and budgetary hurdles. However, each decade brings improvements in the technology. I wouldn't be surprised to see turbines below the water at the Narrows Bridge generating a small amount of power in the future. The City of Portland has a pilot project where they have put small turbines in the water mains to generate small amounts of local power.
The question is whether the power generated will be worth the initial capitol investment and the maintenance costs.
Thanks for posting, this is very interesting. There was also a tidal power demo project down at Race Rocks about 10 years ago Integrated Energy Project Update | Race Rocks. It was a submerged turbine that was mounted on a steel pile drilled and socketed into the sea bed, and it worked OK from what I understand. I like the idea of this floating unit: much easier to maintain. It would be tricky to moor this to the seabed however. It must have involved some diver/underwater work to drill and anchor moorings to the seabed.
This is fascinating and anyone familiar with the area will know the challenges.
Years ago, my wife and two friends stayed at the Dent Island Lodge for a night and were flabbergasted at the tidal flows. Logs, tree stumps, you name it, were passing by my friend's Nordhavn 57. The service at the lodge was the very finest!
__________________ Codger 1941.. Constant pursuit of the ultimate SoCal Cruising boat.
While I appreciate the technical challenges of such a project, it sure doesn't make sense financially. Take the reported project costs of $5,179,000 Ca which is equal to US $3,900,000 and divide by the KW output of 500 and you get $8,000 per KW. Solar is less than half and has no real operating and maintenance costs.
Admittedly it does include a storage and energy management system which lets it provide power 24 hours a day but at a very high cost.