Rats, darn. Good news is that the cement ramp, replacing the front steps, was poured Thursday, and the "exposing" part of the exposed aggregate was finished Friday.
I took Mike to a class on making rain barrels Thursday night. And that is where the "Duh-oh, oh no" part comes in. And I KNEW this: we want to use a rain barrel to capture part of the rainwater coming from the roof, and use it in the flower gardens. This helps make up for our big impervious footprint, where rainwater can't filter back into the groundwater systems like it used to. During this class, they reminded me of what else I already knew that can help: use pervious surfaces.
We should have asked the contractor to use
pervious concrete (also known as porous concrete).
Pervious concrete looks sort of like Rice Krispie treats, so it looks a lot like exposed aggregate. Water drains right through it instead of (in our case) runnning down the street and into Salmon Creek.
Maybe I should go out to the worm bin and beat myself with one of the red wigglers. Oh, wait, that wouldn't be kind to the worm.