Okla. Stat. tit. 69, § 69-659: County bridge standards - Demonstration bridge projects -

Engineering services.

The Department of Transportation is hereby authorized to develop

a complete set of county bridge standards, including standards for

demonstration bridge projects and standards for county bridges with

low average daily traffic volumes as defined by the latest published

version of the County Roads Design Guidelines Manual. Such

standards shall be developed under the direction of the Bridge

Division of the Department and prior to implementation shall be

approved by the Oklahoma Cooperative Circuit Engineering Districts

Board and the Transportation Commission. Such standards shall be

furnished without cost to local units of government. Monies

received by the county pursuant to the County Bridge and Road

Improvement Act, Section 657 et seq. of this title, may be used for

purposes of obtaining engineering services. Only registered

professional engineers, approved by the Department, experienced in

the design and construction of highway and related facilities, shall

be used for such services. Counties acquiring engineering services

as provided for in this section shall require the engineers

providing such services to execute professional service contracts

which include a requirement that the engineer shall maintain an

adequate policy of professional liability insurance.