During the construction, enlargement, repair, alteration, or removal of any dam or reservoir, periodic inspections may be made by the Board and the owner shall be required to perform at his expense such works or tests as necessary to disclose information sufficient to enable the Board to determine that substantial conformity with approved plans and specifications is being secured, which shall include adequate inspection, at owner's expense, to satisfy the Board of substantial compliance to approved plans, drawings, and specifications.
Okla. Admin. Code § 785:25-7-1