(AREA) — A $1.1 billion deal to merge Midland-based Chemical Bank and Talmer Bank, headquartered in Troy has been approved by the state this week. Chemical and Talmer shareholders previously approved the merger, which is expected to close on August 31. The 83 Talmer Bank branches, including the 53 in Michigan, would become Chemical Bank branches by mid-November. Locally, there are Talmer offices in Sandusky, Port Huron, Lexington, Harbor Beach, Bad Axe, Port Hope, and Sebewaing. Chemical Bank has 180 branches with local offices in Marlette, Caro, Cass City, Bad Axe, Harbor Beach and Fairgrove. The merger makes Chemical Bank the largest Michigan-based bank.