This site will provide this information and more:
According to ZipRecruiter.com, as of Jan 19, 2019, the average annual pay for a Heavy Equipment Operator in the United States is $42,047 a year or $20.21 per hour.
While ZipRecruiter is seeing annual salaries as high as $61,000 and as low as $22,500, the majority of Heavy Equipment Operator salaries currently range between $34,000 (25th percentile) to $48,000 (75th percentile) across the United States.
D'Lynne recommends the following next steps:
It depends on location and if union verses non union. One way to monitor wage rates is check the governments Davis Bacon https://www.dol.gov/whd/govcontracts/dbra.htm