Okla. Stat. tit. 69, § 69-607: Intercounty bridges - Proceedings (Boundary bridges)

(a) Whenever the public convenience justly demands it and the

need thereof shall be appropriately signified, as herein provided,

then the board of county commissioners must proceed as follows with

respect to intercounty bridges across streams serving in whole or in

part as a boundary between two counties: After the presentation in

the case of a bridge to cost not over One Thousand Dollars

($1,000.00), of a petition signed by at least fifty taxpayers of

each county; to cost from One Thousand Dollars ($1,000.00) to Ten

Thousand Dollars ($10,000.00), by seventy-five taxpaying signers in

each county; to cost more than Ten Thousand Dollars ($10,000.00), by

one hundred taxpaying signers in each county, to the board of county

commissioners, it may within one (1) year proceed to act and

construct the bridge if such levy as may be required for this

purpose may be made within the constitutional limitation as to tax

levies; and such petitions or actions, at whatever stage, shall bind

and have equal force with the successors in office to those

Commissioners originally receiving it. The cost of the bridge shall

be apportioned between the counties upon the basis of their total

valuation, unless the boards of county commissioners in the exercise

of sound judgment shall agree to apportion it otherwise.

(b) The above proceeding shall not apply in the case of

intercounty bridges where the total span is two hundred (200) feet

or more, including approaches thereto of timber work or any material

other than earth embankment, if there is another bridge of

substantially equal size and importance over the same stream within

six (6) miles of the proposed location.