Part 1 - APWA Iowa Chapter

Transcription

Part 1 - APWA Iowa Chapter
Alaska Department of
Transportation & Public Facilities
Winter Maintenance
on an Alaskan Scale
Michael J. Coffey
Southcoast Region Director
4/12/2016
APWA Iowa Spring Conference 2016
1
Alaska
Land of Extremes
Largest State: larger than the next four largest
states combined
Heaviest Annual Snowfall: 974.5 inches at
Thompson Pass near Valdez
Tallest Mountain in North America: Denali at
20,320 feet
Most Glaciers in the Nation: 29,000+ square
miles or 5% of the State
Shoreline: 33,904 miles
Temperature Extremes: 100F in Fort Yukon
and -80F in Prospect Creek
Permafrost: 80% of State underlaid by ice-rich
permafrost
Barrow: Northern most town in US. Three
months without the sun and 82 days without the
sun setting
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APWA Iowa Spring Conference 2016
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Alaska Department of Transportation
and Public Facilities
Over 15,000 Miles of Public
Roadway
Over 5,600 Miles of State
owned road
810 Bridges
247 Rural Airports
22 Harbors
720 Buildings (DOT owned
or managed)
Alaska Marine Hwy System
35 ports of call
11 vessels
3,500 miles
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APWA Iowa Spring Conference 2016
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Maintenance and Operations
Nearly 1000 M&O/SEF
Employees Statewide
79 Maintenance Stations
3944 Pieces of Equipment
$170M M&O Operating Budget
$34M SEF Operating Budget
$55M Snow and Ice Control
18,000 Tons of Salt Annually
$50M FHWA PM Program
$5-10M FAA Surface Maintenance
$3-20M Deferred Maintenance
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APWA lowa Spring Conference 2016
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Alaska Highway System
ALASKA ROUTE NUMBERS
BARROW
°STERLING HWY, SEWARD HWY, GLENN HWY, RICHARDSON HWY, TOK CUT-OFF
® ALASKA HWY, STEESE HWY, ELLIOTT HWY
PRUDHOE BAY
D GEORGE PARKS HWY
0 RICHARDSON HWY
0 TAYLOR HWY
0 STEESE HWY
0 HAINES HWY
GLACIER HWY, EGAN DRIVE (JUNEAU)
NORDIC DRIVE, MITKOFF HWY (PETERSBURG)
SOUTH TONGASS HWY, NORTH TONGASS HWY (KETCHIKAN)
0 DENALI HWY
0 SEWARD HWY, SEWARD TO STERLING HWY
@ COPPER RIVER HWY, EDGERTON HWY
JAMES DALTON HWY
sa KLONDIKE HWY
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APWA Iowa Spring Conference 2016
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Urban Life
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Rural (Bush) Life
Rural (Bush) Life
Normal Rural Mail Delivery
APWA Iowa Spring Conference 2016
Winter Maintenance Challenges
Extreme Temperatures: -80F to +100F
Extreme Snowfall: 1.5' to 80'
Extreme Geography: Maritime to Arctic
Extreme Cost:
Bulk Salt
$147/ton
Bagged Salt
$400/ton
Organic Additive
Mag Chloride
Diesel
$2.40+/gal
$4.00+/gal
$9-$10/gal in Villages
Equip Shipping
up to $60,000 ea
Changing Climate
Declining Budget
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APWA Iowa Spring Conference 2016
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Winter Maintenance Challenges
Fly it in and fly
in out
Fly in the fuel
Spare parts
Fly it back, or
stranded asset
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Maintenance Challenges
-
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What is Permafrost
Permafrost is any
rock or soil that has
remained below 32 F
continuously for two
or more years.
Permafrost can vary
from only a few
inches in depth to
over several thousand
feet.
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a)
0
Permafrost Problems
Glenn Highway Distress
11.11111
51:1J9' Mkt' Highway paveme
Rutting
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Longitudinal Shoulder Cracking
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Thaw Settlement
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Ice-Rich Permafrost Thawing
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Ice-Rich Permafrost Thawing
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The Blob
JINNIKe
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Um-
r-it alb
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Changing Weather Patterns
Temperatures Increases
Permafrost Thawing Affecting
Infrastructure Support
Increasing Risk of Landslides
Diminishing Sea Ice and
Increasing Coastal Erosion
Increase in Freeze-Thaw Cycles
Precipitation Changes
Increases in Storm Frequencies
and Intensities
Combined Effect on Glacial
Run-Off and Ice Break-Up
Stream migration and
debris effects
Possible Contributing Effect
on Permafrost Thawing
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APWA Iowa Spring Conference 2016
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Changing Weather Patterns
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ti
r
2014 Pineapple Express
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k
ldez, AK USA 'Valdez
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Setting the Stage
18 day long weather system / avalanche problems
At Thompson Pass 80" of snowfall Jan 1St 23rd
(250" Nov 11 to end of Jan)
At 4000' an estimated 5' accumulated between
17t" over cold, dry, low density 1/13th
1 /14t"
snow
The huge avalanche was conditioned by three
consecutive days of record high or record high
minimum temperatures and then triggered by
days of record anomalous rainfall
Between Jan 21 and 25, 6 to 12 inches of rain fell
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Video Summary
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Recurring Ice Storms
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Winter Maintenance technologies
64 RWIS Installations
Expanding Highway
Anti-icing Program
12 New Enhanced
Salt Brine Units
Six Tow Plows
Ice Breaking Technology
Smart Snowplows
Automated Bridge De-icing
System (E36)
Telematics
Mobile Weather Detection
System
Alaska Specific MDSS
4/12/2016
2/2/2011
SALT BRINE APPLICATION KENAI URBAN
APWA Iowa Spring Conference 2016
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Winter Maintenance Technologies
Need for ice breaking
technology
Raiko Icebreaker
Ultramech Arctic Shark
Alaska Made
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Ice Breaking Technology
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