1. Geotechnical Engineer, Geotechnical and Earthquake Engineering Branch (GEEB), Geosciences and Structures Division (GSD), Geotechnical and Structures Laboratory (GSL), U.S. Army Corps of Engineers (USACE) Engineer Research and Development Center (ERDC), 3909 Halls Ferry Rd., Vicksburg, MS 39180-6199. E-mail: george.l.sills@erdc.usace.army.mil
2. Geotechnical Engineer, Geotechnical and Earthquake Engineering Branch (GEEB), Geosciences and Structures Division (GSD), Geotechnical and Structures Laboratory (GSL), U.S. Army Corps of Engineers (USACE) Engineer Research and Development Center (ERDC), 3909 Halls Ferry Rd., Vicksburg, MS 39180-6199 (corresponding author). E-mail: noah.d.vroman@erdc.usace.army.mil
3. Geotechnical Engineer, Airfields and Pavements Branch, Engineering Systems and Materials Division, GSL, USACE ERDC, 3909 Halls Ferry Rd., Vicksburg, MS 39180-6199. E-mail: ronald.e.wahl@erdc.usace.army.mil
4. Geotechnical Regional Specialist, USACE, St. Paul District, Sibley Square at Mears Park, 190 Fifth St. East, Suite 401, St. Paul, MN 55101-1638. E-mail: neil.t.schwanz@usace.army.mil