S.C. Code Ann. § 6-21-140

Whenever the governing body of any borrower shall determine to purchase, construct, improve, enlarge, extend or repair any system named in SECTION 6-21-50 under the provisions of this chapter, it shall first cause an estimate to be made of the cost thereof and the fact that such estimate has been made and the amount thereof shall appear in the ordinance authorizing and providing for the issuance of the bonds.