DES MOINES (AP) — Workers in Iowa’s largest public-sector union won’t have to contribute to their health insurance, but they will not see an overall raise under a new two-year contract issued by an arbitrator Thursday.

The contract for the 20,000 members of Iowa Council 61 of the American Federation of State, County and Municipal Employees includes no raises, except for step increases for workers who haven’t reached top pay scale.

Local 61 President Danny Homan said the union and Gov. Terry Branstad agreed on wage terms during negotiations, but the process went to neutral arbitration in February because the two sides couldn’t resolve health care.