The Associated General Contractors and Associated Builders and Contractors of Nevada filed a lawsuit against the DOL for allegedly violating its own rules in the 2017 wage survey by using data from Las Vegas to determine prevailing construction wages in northern Nevada counties. Specifically, they allege that the prevailing wage for dump truck drivers in Northern Nevada should have been $31.22 instead of the the $56.17 that the DOL used.
See here for more information: https://www.constructiondive.com/news/agc-abc-sue-labor-department-over-davis-bacon-wages-in-nevada/607935