Okla. Stat. tit. 27, § 27-16: Just compensation defined

A. In every case wherein private property is taken or damaged

for public use, the person whose property is taken or damaged shall

be entitled to just compensation.

B. "Just compensation", as used in subsection A of this

section, shall mean the value of the property taken, and in

addition, any injury to any part of the property not taken. Any

special and direct benefits to the part of the property not taken

may be offset only against any injury to the property not taken. If

only a part of a tract is taken, just compensation shall be

ascertained by determining the difference between the fair market

value of the whole tract immediately before the taking and the fair

market value of that portion left remaining immediately after the

taking.