MINNEAPOLIS (WCCO) — The Minnesota Sports Facilities Authority and Mortenson Company will be going to mediation over millions of dollars in stadium construction costs.

A statement released by the MSFA says they were notified by the company that a formal application was submitted to engage in mediation over disputed costs related to new Vikings stadium project.

The MSFA and Mortenson have been unable to reach an agreement over $15 million in expenses.

Mortenson also filed for a right to proceed with arbitration if mediation is unsuccessful.