Roger OlsonPhone: 651/366-5517 Email: Roger.Olson@state.mn.us Completed Projects TitleYearReport #Preventive Maintenance for Recreational Trails20092009-25 Use of Foamed Asphalt Base Reclamation on Local Roads.20092009-09 Long Term Maintenance Effects on HMA Pavements Caused by Rumble Strips and Available Preventive Treatment Methods20082008-50