BILLMARK'S LAKES AREA INSURANCE D INCORPORATED GRINNELL MUTUAL® Trust in Tomorrow. 913 Broadway, Alexandria 320-763-9022 105 Central Ave., Brandon 320-834-2409 BILLMARK'S LAKES AREA INSURANCE D INCORPORATED GRINNELL MUTUAL® Trust in Tomorrow . 913 Broadway , Alexandria 320-763-9022 105 Central Ave. , Brandon 320-834-2409