BRUNSWICK — A 1,100- mile high-speed Internet project connecting more than 100 Maine communities is accepting customers after its completion this summer, officials said Friday.

The Three Ring Binder project is named for the three rings of fiber-optic networks that circle through rural western, eastern and northern Maine. It spans 110,000 households, 600 schools, libraries and other institutions and 38 government facilities.

Twelve customers already are leasing fiber on the network and another 29 contracts are under consideration, Maine Fiber CEO Dwight Allison said.

The formal celebration of the completion of the $30 million project was held at Oxford Networks’ data center, located in a former high-security building that was home to fleet communications at Brunswick Naval Air Station, now known as Brunswick Landing.

Most of the cost of the project — about $25 million — was fundedwith federal stimulus money. Maine Fiber was created to oversee the project.