University leaders said they reached a tentative agreement with both unions Friday, but it didn't work out. The majority of workers voted down the latest proposal form the university this weekend.
Many have been picketing for hours. Union leaders said the main sticking points were wages, contract length and discipline. There are workers stationed at about 20 different places around campus.
They plan to be there 24-hours a day until this is all over at midnight Thursday. While UI leaders work to fill their shoes temporarily, union representatives said they want campus officials to hear their message loud and clear.
University leaders said they went through more than a dozen negotiation sessions with the unions and even brought in a federal mediator. But they still haven't been able to agree to a contract.