Snohomish County Executive Aaron Reardon and Tulalip Tribes Chairman Stanley Jones will sign an agreement Monday that spells out new ways the two governments can work together.
The memorandum of understanding will be formalized at the Rosehill Community Center in Mukilteo near the spot where the Treaty of Point Elliott was signed in 1855.
The agreement says the governments for the tribe and the county will work together on economic, educational, health and other issues.
County and tribal officials hope the agreement will improve communication and help solve disputes between the governments.
The Tulalip Tribes has more than 3,300 members; about 2,000 of them live on the Tulalip Reservation near Marysville.
The signing ceremony will include performances by the Tulalip Tribes Salmon Ceremony Group and the Kamiak High School band. The ceremony begins at noon.