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