Okla. Stat. tit. 69, § 69-614: Convicts on rock pile or other public work

When, in the judgment of the board of county commissioners, the

expense of working the convicts upon the public highways is too

great, on account of the small number thereof, or for any other

reason, then it shall have authority to provide all necessary

apparatus for working of such convicts upon a rock pile, or rock

crusher, for the purpose of providing material for use upon the

public highways of the county. Such authority shall be exercised in

the same manner as is provided in the preceding section for the

working of convicts upon the public highways, and the board of

county commissioners shall have full authority as to how and where

such materials shall be used; provided, it shall use same for no

other purpose than the betterment of the public highways in the

county; provided, further, that in any county where the working of

convicts upon a rock pile, or rock crusher, is found impractical for

any reason, then the board of county commissioners may provide for

the working of the convicts upon any public work in which the county

has an interest.