Just saw someone post this showing flooding at Lake Merritt in Oakland:

"Lake Merritt" is actually not a lake, it's the...urbanmost? part of the estuary that remains inside Oakland. In the 60s they experienced severe flooding that really fucked up downtown:

As a result of which they built a beefy flood control / pumping station at the channel which leads into the "lake." I actually went on a tour of the flood control station a while back!

From the surface it looks pretty unremarkable as a piece of infrastructure:

But it extends the equivalent of a couple of stories below ground and houses big diesel-powered pumps, which I think in practice are basically never actually used; they just control the water levels by closing the gates.

Our birds love to fish from both sides of the pumping station.

More photos here.