Field Testing and Long-Term Monitoring of Selected High-Mast Lighting Towers

In 2013, Wyoming Department of Transportation (WYDOT) Projects B139025 and B133026 installed a combined 21 high-mast light towers (HMLT) in District 1 and District 3. The HMLTs were fabricated by Valmont Industries according to WYDOT Standard Plan and were installed by Modern Electric of Casper, WY. In May 2016, after only three years of service, inspectors discovered fatigue cracks on two HMLTs located at the Wagonhound Rest Area of of I-80 near Exit 267. One of the HMLTs was missing a luminaire. Further inspection revealed that one more HMLT (also located at the Wagonhound Rest Area) had significant fatigue damage too. Weather data collected by a nearby weather station was reviewed by WYDOT officials showing high winds, rain and freezing temperatures. The cause of the fatigue cracking cannot be determined at this time. Monitoring has been on-going at the selected locations for several months. While useful data have been collected, no significant vibration events have been observed. To increase the likelihood of recording such an event, it is proposed to extend the monitoring for an additional 12 months beyond the original end date. This proposal summarizes this work.


    • Status: Completed
    • Funding: $209965
    • Contract Numbers:


    • Sponsor Organizations:

      Wyoming Department of Transportation

      5300 Bishop Blvd.
      Cheyenne, WY  United States  82009-3340
    • Managing Organizations:

      Purdue University

      155 South Grant Street
      West Lafayette, IN  United States  47907-2114
    • Project Managers:

      Cortez, Paul

    • Principal Investigators:

      Connor, Robert

      Lloyd, Jason

    • Start Date: 20170314
    • Expected Completion Date: 20200331
    • Actual Completion Date: 0

    Subject/Index Terms

    Filing Info

    • Accession Number: 01687761
    • Record Type: Research project
    • Source Agency: Wyoming Department of Transportation
    • Contract Numbers: RS07217
    • Files: RIP, STATEDOT
    • Created Date: Dec 5 2018 11:38AM