Okla. Admin. Code § 460:20-6-5
Any person extracting coal incident to government-financed highway or other construction who extracts more than 250 tons of coal or affects more than two acres shall maintain, on the site of the extraction operation and available for inspection, document which show:
Added at 12 Ok Reg 115, eff 9-29-94 through 7-14-95 (emergency)
Added at 12 Ok Reg 3592, eff 10-12-95