Texas Local Government Code - LOC GOV'T § 72.006. Payment of Expenses

(a) The counties that have an interest in the boundary lines in question shall divide the expenses incurred in making the survey and establishing the boundary markers in proportion to each county's frontage on the line.

(b) A surveyor appointed under this chapter is entitled to receive the actual expenses incurred in making the survey and any fees for surveying services agreed on by the surveyor and the counties.