This is posted on the site (don't know when it came up because I had the window sized to the cam part only, and just now thought about seeing if they said anything and I didn't really think they would have because they almost never do but lo and behold there it was....)
Notice:
The Great River Energy Bird Cam will be down for maintenance on Wednesday, June 10 from 8:00 a.m. – noon (CST). It will be up and running as soon as possible.
Newborn peregrine falcons banded
Great River Energy, the Raptor Resource Project and Rogers Middle School’s After-School Environmental Explorers, participated in the banding of the four falcons on Tuesday, June 9. The falcons were born on May 19.
This is the third consecutive year that two peregrine falcons have made their home in a nesting box located atop the plant near the banks of the Mississippi River. The students from Rogers Middle School will name the birds.
so, it seems to me it's already down.... and they didn't tell us the genders, either! but at least we know all is okay.