Pavement Maintenance and Microsurfacing Board of Aldermen Discussion Session January 26, 2010.

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Presentation transcript:

Pavement Maintenance and Microsurfacing Board of Aldermen Discussion Session January 26, 2010

Pavement Maintenance Program Asphalt Streets (entire subdivision) – Year 0-Asphalt Surface Installed – Year 7-Microsurfacing – Year 14-Microsurfacing – Year 20-Mill and Asphalt Overlay – Cracksealing every 2 years (east/west)

Pavement Maintenance Program Concrete Streets and Alleys – Surface treatment on Carondelet Plaza in 2012 – Replacement of Alleys every years – Cracksealing every 2 years (east/west)

Annual Pavement Evaluation Performed in January each year Each street/alley evaluated Alley replacement prioritized based upon condition and budget Streets follow predictable decline and improvement due to our program

Pavement Condition Index 5: “Like New” condition 4: Minor reflective cracks 3: More extensive cracking, microsurfacing starting to deteriorate 2: Significant cracking. Significant deterioration of microsurfacing, leaving up to 50% exposed asphalt. Asphalt may be raveling. 1: Significant cracking, potholes forming. Nearly all microsurfacing gone. In dire need of rehabilitation.

Pavement Condition Index Scorecard goal: 85% of streets (by area) score 3 or better – 2007: 83% – 2008: 90% – 2009: 72% – 2010: 88% PROJECTED

Deterioration of Pavement

Reactive Pavement Strategy Reconstruct

Reactive Pavement Strategy Reconstruct

Proactive Maintenance Strategy Years 0-7 Microsurface

Proactive Maintenance Strategy Years 7-14 Microsurface

Proactive Maintenance Strategy Years Microsurface Mill & Overlay

Proactive Maintenance Strategy Years 20+ Microsurface Mill & Overlay

Proactive vs. Reactive

Benefits of a Proactive Program Pavement maintained at higher level Significant cost savings Entire subdivisions treated at same time Establishment of sequence More predictable budget Environmentally friendly

Microsurfacing Thin layer, approximately ¼” thick – Residential: 1 coat – Arterial: 2 coats Asphalt emulsion Water Aggregate (granite and/or slag) Portland Cement Polymer Binder

Microsurfacing

2010 Microsurfacing Project Residential – 1 coat (medium-duty treatment) – Clayshire, Country Club Estates, Hillcrest – Wednesdays, Thursdays, and Fridays Central Business District – 2 coats (heavy-duty treatment) – Saturdays and Sundays

SUNDAYMONDAYTUESDAYWEDNESDAYTHURSDAYFRIDAYSATURDAY Project Schedule-June 2010

2010 Microsurfacing Project

Project Communications Chamber of Commerce Mailings City Website CityViews Electronic Message Panels Metro (bus re-routing at Transit Center) No Parking Signage Construction Signage

Questions Steve Meyer Civil Engineer