Okla. Stat. tit. 82, § 82-602: Appraisals, how made - Duties of appraisers

(a) During the preparation of the official plan, the board of

appraisers shall examine and become acquainted with the nature of

plans for the improvement of the lands and other property affected

thereby, in order that they may be better prepared to make

appraisals.

When the official plan is filed with the secretary of the

district, he shall at once notify the board of appraisers, and they

shall thereupon proceed to appraise the benefits of every kind to

all property within or without the districts which will result from

the organization of said district and execution of the official

plan; provided, however, that in the case of a district composed in

whole or in part of municipal corporations, state or federal

institutions, and/or political subdivisions, the board of appraisers

may, in lieu of appraising benefits against each separately owned

parcel of realty situated within the same, appraise the benefits as

a whole to all property situated within the boundaries of said

municipal corporation, institution and/or political subdivision. In

such event, the benefits appraised as a whole shall be considered as

benefits to the municipal corporation, institution and/or political

subdivision. It shall be the duty of the governing body of the said

municipal corporation, institution, and/or political subdivision to

collect assessments levied on the appraisal of benefits, as provided

in the Conservancy Act of Oklahoma. Provided, however, that to the

extent legally permissible, as now or hereafter provided, such

municipal corporation, institutions and/or political subdivisions

may pay such portion of any assessments levied under the provisions

of this act from funds and revenues otherwise collected and held by

them, to the extent such manner of payment is deemed desirable. In

the progress of their work, they shall have the assistance of the

attorney, engineer, secretary and other agents and employees of the

board of directors. The board of appraisers shall also appraise the

benefits, if any, accruing to cities, villages, counties, townships

and other public corporations, as political entities and to the

State of Oklahoma.

The appraisers in appraising benefits shall consider only the

effect of the execution of the official plan. The appraisers in

making appraisals of benefits shall give due consideration and

credit to any other works or of the systems of reclamation already

constructed or under construction which form a useful part of the

work of the district according to the official plan.

(b) While making the appraisal of benefits as above provided,

the board of appraisers shall, if directed by the court, estimate

the damages to be substained to each tract of land and to other

property which will result from the execution of the official plan,

including an estimate of the damages to be sustained by the taking

in fee simple of the title to, or of an easement over any land

specified by the board of directors as desired to be so taken, for

the execution of the official plan; and the board of appraisers

shall make a separate detailed report of the same to the clerk of

the court, and to the board of directors for its guidance in

thereafter fixing the payment of such damages or in determining to

proceed by condemnation as provided in Section 607 of this title.