winter highway maintenance in northern arizona · reactive –pothole repair, spot repairs,...
TRANSCRIPT
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Winter Highway Maintenance in Northern Arizona
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Northcentral District Facts
23,000 Square Miles (Larger than 8 US States)
3330 Travel Lane Miles (4592 MLM)
9 Maintenance Units
93 Maintenance Employees
5 Different Counties
5 National Forests
6 Cities
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Major Winter Maintenance Activities
Snow Operations *
Incident Response *
Pavement Repair *
Crack Sealing *
Drainage / Erosion
Shoulder Buildup
Guardrail Repair
Fence Repair
Etc., Etc.
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Snow Operations
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Winter Conditions
Flagstaff Average Snowfall = 103” per year
Average 34 Days of snow
Over 220 Freeze/Thaw Cycles per year
December and January
Average High Temperature 42 deg F
Average Low Temperature 17 deg F
2016 / 2017 Winter
Close Average Winter with 98” of Snow
17 Different Storms (many multiple days)
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Snow Operations
63 Plows in the District
12 hr Shift for Snow Plow Operators
Snow Operations requires District wide and State wide Support
50 Loaners and Volunteers from Other Areas
Road Block and Motorist Assist Crews
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Incident Response in the Winter
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Pavement Preservation Cycle
The Right Treatment at the Right Time
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Reality
2005 – 10 years
1995 Pavement Preservation Project – I-40
2010 – 15 years 2013 – 18 years
2015 – 20 years 2016 – 21 years
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February 2017 – 22 years after last pavement project.
Pavement Preservation
Project in Summer of
2017 replaced this area.
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Pavement Repair
Aging Pavement System
Severe Weather
Heavy I-40 Truck Traffic
Rapid Deterioration after Design Life
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Pavement Repair
Preventative – Flush Coat and Crack Sealing
Reactive – Pothole repair, Spot Repairs, Overlays
Goal for Maintenance to increase Preventative Strategies
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Crack Filling and Sealing
Prioritized Winter Maintenance Activity
Polymerized Asphalt Material
Clean and fill
Wide Cracks In Old Pavements
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Pot Hole Repair
Winter of 2016 / 2017
Clean
Dry (as much as possible)
Place
Compact
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Pot Hole Repair
Change in Repair Last Winter (when time allows)
1) Tack
2) Compaction with a Steel Wheel Roller
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Asphalt Hot Box
Hot Plants Close in the Flagstaff Area for winter
Long Haul to get Asphalt Mix from other Areas
4 CY Hot Box – New Equipment
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Asphalt Recycler – 1 CY Capacity
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Pavement Spot Repairs
Mill and Replace is becoming common practice
Small areas with reoccurring issues
Last Longer than Cold Mix Overlays
Less Exposure for Maintenance Personnel
Higher Costs $$$
Maintenance On-Call Contract for larger areas
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Spot Repairs
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Overlays – Cold Mix
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Challenges
Longer cycle time for Pavement Projects
Funding
Personnel Turnover / Burn-out
Equipment / Materials
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Winter Damage to Interstates Last Winter
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Opportunities
Full Depth Pavement Reconstruction Projects
Devil Dog – I-40 – MP 156 – 161
Cataract Lake – Parks – MP 161 – 179 (6 Miles of Reconstruction)
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Devil Dog I-40 – MP 156 - 161
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Opportunities
Equipment and Training for Personnel
Measurements and Continuous Improvement
Continue to Implement Pavement Preventative Maintenance Strategies
Balance Reactive and Proactive Approach
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Upcoming Pavement Rehab Projects
I-40 – Parks to Riordan - Current
I-40 – Cataract Lake to Parks - FY 18
I-17 – County Line to I-40 (NB only) – FY 18
I-40 – System Interchange to Walnut Canyon – FY 20
SR 89A – Sedona City Limits to MP 386
SR 179 – I-17 to Village of Oak Creek
SR 64 – Pipe Line Road – Air Park
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Chad Auker – Northcentral Assistant District Engineer
928-779-7551
Thank You!