Never heard of the 451 freq. the 462.0625 is the campus staff, admin, janitors, officers etc heard just about everything on there and it starts to come in pretty clear around 1604 and kitty hawk....I am sure wagner has there own as most schools have some form of radio communications. I have a friend that works for another school district police department and each high school, middle and elementry have radios for campus ops and the whatever officer is assigned to a middle or high school campus carrys two radios, one for PD dispatch and the other for contact with the school itself. The tone is DCS 346 for Judson.
I just find things the old fasion way by searching within a band, I use to have LTR analyzer but not anymore so pretty much just use the database for ltr stuff