You lucked out then! If it were me, I'd try to identify a
company working that site and try contacting them about the
damage - you might be pleasantly surprised as they are insured
for such things, and obligated to handle them.
If it's the wrong company, which is quite possible, they might
be able to tell you who it came from.
Either way, your local DOT would still be able to give you some
further direction. Since you "removed" the debris for them, you
may have saved a pretty disastrous accident from happening <g>.
The reason I feel like I know what I'm talking about is I had a
chip of concrete come off an overpass and put a good scratch on
my windshield. I talked to the foreman at the site and he gave
me the place to call, and I had a check within a few days to
replace the windshield. One of my nephews is also Town
Supervisor and they have the same requirements, and insurance.
Letting any debris get off the work site is a serious offense.
Best of luck!
: yes i do - it was lodged in the wheelwell :(