SEEKONK — Despite more than three months of negotiations, all seven municipal-employee contracts expired on Monday without new agreements to take their place.

The town has been in talks for new, three-year pacts for the unions representing Seekonk police officers, firefighters, public works employees, Town Hall supervisors, Town Hall clerks, library workers and emergency dispatchers.

Town Administrator Michael J. Carroll said yesterday that negotiations are “at a standstill” between the town and the unions representing the Police Department and the Department of Public Works. Both those unions have requested mediation, Carroll said.

Talks on the five other contracts are progressing, Carroll said, but to varying extents.

“For all of them, we’ve gotten to the point that there are some things both sides accept and some things both side acknowledge they’re not going to pursue any further, and there are other things both sides are negotiating back and forth,” Carroll said.

With the DPW and police talks, “There are other things we just can’t get over,” Carroll said, declining to be more specific. “That’s why the normal next step is to request mediation.”

All the employee contracts include “evergreen” clauses, which provide for the terms of the contracts to remain in effect after the expiration date.

Once formalized, the new contracts must be approved by the Board of Selectmen.

The fiscal 2009 budget includes level funding for employee salaries. Any salary increases would have to be approved by voters at the fall Town Meeting, Carroll said.

Neither David Miller, the union head for the DPW, or Patrolman Thomas Hedrick, the leader of the police union, could be reached for comment yesterday.

mwims@projo.com