It is actually licensed to PO Public works, as a back up channel. Its secondary use is by POPD as a tac channel. It is used by PW when they have snow plows out in the winter time, and a few other times per year... The call sign is KCK556. KNFD369 is the channel you are talking about, and yes, that is also their public works channel.
This is the eligibility statement from their FCC application...
FCC wrote:
COORDINATION OF CITY PUBLIC WORKS DEPT. USED AS BACK UP TACTICAL CIRCUIT FOR CITY POLICE DEPT. PUBLIC WORKS RESPONDS TO FLOODING, AND OTHER PUBLIC SAFETY ISSUES.