Project Updates

4 December 2015

Frozen Debris Lobes 2014-1B

AUTC Project: 614001

by billy.connor

Frozen debris lobes (FDLs) are slow-moving landslides in permafrost, many of which are present along the Dalton Highway in the Brooks Range.  While twenty-three FDLs are within a mile uphill of the highway, the closest, FDL-A at MP219, is less than 190 ft from the highway shoulder as of August 2013.  In 2010, FDL-A was 65-ft high and 560-ft wide at the toe.  Using some estimated values for cross-sectional shape, unit weight of the soil, and the historic rate of movement, in 2010 FDL-A was moving about 60 tons of debris towards the highway every day.  Measurements indicate that FDL-A started moving faster in recent years, and is beginning to demonstrate characteristics of further instability.  A few years ago, similar signs of instability were present in FDL-D, another frozen debris lobe three miles to the south.  In essence, FDL-D “detached” from its catchment area and moved 380 ft in three years (between 2010 and 2013).  Should FDL-A follow a similar trend, it could cover the distance to the highway in about a year, and be almost half way to the Trans Alaska Pipeline System (TAPS) in three years.  While a Phase 1 study provided a preliminary characterization of the internal structure of FDL-A, additional study is needed to define further the movement mechanism/s of the FDL and to characterize better its internal makeup.  This information is necessary to identify the best mitigation technique/s for implementation.

visit: fdlalaska.org for additional information.

FDL arial photo

Picture by M. Darrow

Darrow_FDL_Ph1B_2015

24 July 2015

Dust Control Field Guide for Gravel Driving Surfaces

AUTC Project:

by billy.connor

dust-cntrl-fg

26 June 2015

Specialized Testing of Asphalt Cements from Various ADOT&PF Paving Projects

AUTC Project: INE/AUTC 15.06

by billy.connor

FINAL – ALASKA DOT FINAL REPORT

8 April 2015

A Platform for Proactive, Risk-Based Slope Asset Management, Phase II

AUTC Project: S16899

by billy.connor

S16899FINAL_Cunningham

12 March 2015

Estimating Future Flood Frequency and Magnitude in Basins Affected by Glacier Wastage

AUTC Project: S16806

by billy.connor

Liljedahl_FINAL-REPORT_v2015-03-10

30 January 2015

Understanding and Mitigating Effects of Chloride Deicer Exposure on Concrete

AUTC Project: 510003

by billy.connor

Understanding and Mitigating Effects of Chloride Deicer Exposure on Concrete

30 January 2015

Phase II: Chulitna River Bridge Structurally Health Monitoring

AUTC Project: G8085

by billy.connor

Chulitna River Bridge Final (01-27-2015,jlh) (2)

29 January 2015

Alaska Road Weather Project: Partnership with NCAR

AUTC Project: RR12.01

by billy.connor

RR12.01.Connor

29 January 2015

Life Cycle Costs for Alaska Bridges

AUTC Project: 207083

by billy.connor

Life Cycle Costs for Alaska Bridges

1 December 2014

The Response of Pile-Guided Floats Subjected to Dynamic Loading Volume II Annex

AUTC Project: MISC2

by billy.connor

Pile Guided Floats Volume II

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