CATV feeds

They're replacing the roads in our neighborhood.  That
means lots of excavation.
CATV and phone are notorious for burying their lines
REALLY shallow (*inches* as we have no frost heave to
worry about).
So, the CATV feeds have been dug-up in many cases.
Is the signal that passes through these the same
signal that is delivered to subscribers (i.e., just
"split" off, no down conversion?)?
What sort of power levels would be encountered?
I assume there are multiple "feeds" to the neighborhood
(a few hundred subscribers) so some sort of "head amp"
upstream?