Okla. Stat. tit. 82, § 82-1085.21: Agreements with federal agencies - Cost of

reimbursement.

Whenever any project or plan for the construction or enlargement

of any dam, reservoir or other structure includes within its design

and specifications provisions for the development of water supplies

for domestic, municipal, agricultural, industrial and other purposes

the Commission is hereby directed to negotiate with the

municipalities or other local interests of this state and its

agencies and the federal government or its responsible agency,

department or instrumentality for the purpose of determining the

cost of reimbursing the federal government for the allocated cost of

including such municipal, agricultural and industrial water storage

within such construction. Any available storage for such purposes

which cannot reasonably be used within the present or estimated

future firm demands of local users may be contracted for by the

Commission in order to assure the federal government that such added

cost will be provided as authorized by federal law, and that

necessary funds for any charges shall be paid by the Commission to

the federal government pursuant to such contract and applicable

federal law after examination and determination by the Oklahoma

Water Resources Board that such charges are in harmony with existing

federal law and policy at the time that the projects are built and

the contracts between the Commission and the federal government are

executed. In cases where all necessary costs to provide maximum

conservation storage in a site cannot be contracted for between the

federal government and the Commission because of limitations on the

participation by the federal government, the Commission shall have

the authority to provide funds covering those costs.