Welcome to RR. You will find an extensive list of trunked and conventional frequencies in our database at: http://www.radioreference.com/apps/db/?ctid=2265 It does not appear that the City of Erie has any trunking(trunked systems are at the very top of the page), but Millcreek does. Must not be operational yet, as the type of trunked system is not identified.
No public safety agencies in Erie County currently use trunked systems. Erie police are dispatched on 460.05, and Erie fire dispatch is on 154.43. Millcreek FD's are dispatched on 453.5, and Mu=illcreek police operate on 154.8.