Making Greenways Greener: Developing a Sustainable Trail in

Ramsey County

Ramsey County 2007 Lower Afton Road Trail Project

 By Commissioner Victoria Reinhardt

andBridget Beck

 

Deciding to Build a Green TrailPolicy Background

• Citizens want a trail for Bike and Ped Safety

• Parks and Corrections own the land

• Segment is short and is a vital connection for the East Metro trail system.

Waste Shingles as a Resource

• Shingles are 15.2% of Construction and Demolition Waste (2006)

• 300,000 Tons of Roofing Waste per Year

• 20% of Demolition Landfill Space. (2004)

• 91% of Residential Roofing Waste is Asphalt Shingles

Collaboration for Results

• Recognizing the role that everyone plays

• Public health has the material

• Public Works has a potential market

• Parks has a project to help demonstrate the use of post consumer tear off shingles.

Project Overview

• Project Consisted of Utilizing Recycled Products– Tear Off Shingles in Bituminous Mix– Recycled Plastics in Retaining Wall – Recycled Plastic/Rubber Pavers– Class 7 Aggregate (“gravel”) base– Reuse of sand in Rain Gardens– Benches have recycled plastics– Utilizing natural soil erosion material– HDPE Pipe– Natural Products

Bituminous Pavement Design

• Project was State Aid approved

• Mn/DOT Engineered HMA Spec.– Early involvement of Mn/DOT– County required 5% tear off shingles!– Option to have RAP – Utilized type PG 58-28 virgin asphalt binder oil– Minimum of 70% virgin asphalt binder in mix

LAT Project RAS Spec

– Shingles shall be ½-inch minus– Free of nails, other metal, plastic, wood, glass,

other debris (less than 0.5 percent)– County to approved plans for:

• Where to source the tear-off shingles supplies

• How debris will be sorted out from shingles

LAT Project RAS Spec(continued)

– Suppilers written certification that the shingles are in compliance

– County and Mn/DOT staff shall inspect recycling operations

– Samples of final RAS product shall be provided to County and Mn/DOT

Source of Sorted Shingles

• 75% sorted on site at the roofing job– J Zac, Inc. roofing company– Hauled by Veit– Minor contamination

• 25% supplied from transfer station– Veit Industries– Minimal contamination

Omann’s Grinding Process: Phase I

• Ground to 8” minus

• Removed 95% of nails

• Removed most of the remaining contamination

Omann’s Grinding Process: Phases II and III

• Removed remaining nails• Removed all metallic material• Ground shingles to a very fine consistency

7/16 – inch minus• Provided very clean product

to Midwest Asphalt

• Utilized oil in shingles as partial replacement of virgin asphalt oil

• Used recycled shingles at 5% in place of recycled asphalt pavement (RAP)

Bituminous Supplier & Installer:Midwest Asphalt

Project Notes

• Normal request for bids– Multiple bidders

• Supports MN/DOT tear-off research

• Technical feasibility not economic costs and benefits– Savings on asphalt binder

Concerns/Lessons Learned With Tear off Shingles

• Warm weather• Wind• Ground Shingle stockpile - tacky• HMA – tacky

Making Greenways Greener: Developing a Sustainable Trail in

Ramsey County

Presenters:Ramsey County Commissioner

Victoria Reinhart – 651-266-8363Bridget Beck – 651-266-7121