Iowa Code § 468.34
The board shall publish notice once each week for two consecutive weeks in a newspaper published in the county where the improvement is located, and publish additional advertisement and publication elsewhere as the board may direct. The notice shall state the time and place of letting the work of construction of the improvement, specifying the approximate amount of work to be done in each numbered section of the district, the time fixed for the commencement, and the time of the completion of the work, that bids will be received on the entire work and in sections or divisions of it, and that a bidder will be required to deposit a bid security with the county auditor as provided in section 468.35. All notices shall set the date that bids will be received and upon which the work will be let. However, when the estimated cost of the improvement is less than the adjusted competitive bid threshold, the board may let the contract for the construction without taking bids and without publishing notice.
Iowa Code § 468.34
84 Acts, ch 1055, §10; 84 Acts, ch 1189, §1; 89 Acts, ch 126, §2 94 Acts, ch 1051, §2; 2006 Acts, ch 1056, §1; 2010 Acts, ch 1091, §1, 4; 2014 Acts, ch 1075, §12; 2015 Acts, ch 51, § 5
84 Acts, ch 1055, §10; 84 Acts, ch 1189, §1; 89 Acts, ch 126, §2
CS89, §468.34
94 Acts, ch 1051, §2; 2006 Acts, ch 1056, §1; 2010 Acts, ch 1091, §1, 4