*Bureau of Labor Statistics, U.S. Department of Labor. "Construction and Extraction Occupations." Occupational Outlook Handbook. Accessed June 8, 2021.
Statements found in the United States Department of Labor Occupational Outlook Handbook are not a guarantee of any post-graduation salary, in part because the data used to create the Occupational Outlook Handbook includes workers from differing educational backgrounds, levels of experience, and geographic areas of the country.