Tenn. Code § 69-5-137
After the district is established by the county court, and all damages paid or secured as provided in part 2 of this chapter, if the county court is of opinion that the report of the engineer already made is not sufficiently full or definite to enable the proper letting of contracts for the construction of the improvement, or, for other reasons, is not as full and definite as it should be, the court shall direct the engineer, or another appointed by the court for the purpose, to make a further and more complete survey and estimates of such district and cost of proposed improvements, and report to the court as to the same, giving all necessary and required information, how much of the improvement will be upon each tract of land, as nearly as practicable, giving definite estimates as to cost and character of work, and dividing the work into convenient sections for making contracts, and giving such other particulars as the court may see fit to direct. The report of such engineer shall be made and filed with the county clerk without unreasonable delay. If such engineer fails to act with reasonable promptness, the court may remove the engineer and appoint another in the engineer's stead.
T.C.A. § 69-5-137