How does DOL determine which rate applies to a particular task for the payment of prevailing wage on a public work project?

 The Bureau of Public Work looks at all factors, including: nature of the work, collective bargaining agreements, jurisdictional agreements, jurisdictional decisions, historical practice, past DOL recognition and case law precedents.

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Classification of Workers on Public Work Projects
Information on classifying workers for the proper payment of the prevailing wage
URL: http://www.labor.state.ny.us/business_ny/employer_responsibilities/prevwage/pw_faqs.htm