Okla. Stat. tit. 73, § 73-175: Tunnel construction

The Oklahoma Capitol Improvement Authority is hereby authorized

and directed to construct, from funds legally available, a system of

tunnels to connect the Will Rogers Building to the Tax Commission

Building, the Tax Commission Building to the Education Building, the

Education Building to the Sequoyah Building, the Capitol Building to

the parking lot to the southeast of said Capitol Building east of

Lincoln Boulevard, and the Sequoyah Building-Education Building

tunnel to the parking lot east of the Sequoyah Building located east

of Lincoln Boulevard.