1. 1 Minnesota’s Experience in Implementing the Use of Shingles Roger Olson Research Operations Engineer Minnesota Dept. of Transportation

2. 2 History in MN Based on Manufacturers’ Shingle Scrap Mn/DOT and U of MN lab tests (Newcomb, 1993) Willard Munger Trail (1990) Hwy 25 south of Mayer, MN (1991) Scott County Hwy 17 South of Shakopee, MN (1991) Hennepin County France Avenue (2002) U.S. Highway 10 – (2006)

3. 3 TH 25 Test Section

4. 4 First Mn/DOT Spec Adopted in 1996 Allowed 5% recycled asphalt shingles (RAS) Allowed in wear and non-wear courses Job-by-job approval by Project Engineer required Added like recycled asphalt pavement (RAP)

5. 5 Mn/DOT Spec “Guidelines” (circa 2000) On file with Bituminous Office Contaminants must be removed Certification of supply required Manufactured waste only Mn/DOT to certify suppliers

6. 6 Mn/DOT specification 2360/2350 – 5% manufacturers RAS allowed- approval now permissive (2004 spec change) Virgin asphalt binder must be 70% or greater of total in HMA (2006 spec change) Spec Implementation

7. 7 Tear-off Shingle Pilot Projects City of St. Paul (2003) Dakota County / OEA Lab Study (2005 – 2006) Hassan / Omann (2006) Ramsey County Lower Afton Trail (2007)

8. 8 Ramsey County LAT Project: Tear-off Shingle Spec Funded in part by Mn/DOT State Aid County approached Mn/DOT Specification was drafted by Mn/DOT with guidelines Ramsey County reviewed and approved specification

9. 9 On–Going Research Minnesota SWMCB – Mn/DOT “Technical Working Group” Research Grant from Mn/PCA ($50,000) Future Mn/DOT Participation in Federal / State Pooled Fund Study

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