Okla. Stat. tit. 82, § 82-615: Subsequent appraisals - Procedure

In case any real property within or without any district is

benefited which for any reason was not appraised in the original

proceedings, or was not appraised to the extent of benefits

received, or in case any individual, corporation, municipality,

political subdivision or other district shall make use of or profit

by the works of any district organized under the act to a degree not

compensated for in the original appraisals or in case the directors

of the district find it necessary, subsequent to the time when the

first appraisals are made to take or damage any additional property

within the district, the directors of said district, at any time

such conditions become evident shall direct the board of appraisers

to appraise the benefits or the enhanced benefits received by such

property, including future benefits and future enhanced benefits

thereto, or such damages or value of property taken, and the

proceedings outlined in this act for appraising lands not at first

included within the boundaries of the district, shall in all matters

be conformed with, including notice to the party or parties, and as

to lands or property without the district, the board of directors

shall proceed under the condemnation laws of the State of Oklahoma,

or the board may, at its discretion, make any suitable settlement

with such individual, other district, corporation, county or

municipality for such use, benefit, damage or property taken.