Iowa Code § 384.76
The provisions of this subchapter apply to any public improvement undertaken jointly by the city and another city or by the city and the state or any other political subdivision of the state, and a city may enter into an agreement for such purpose under the provisions of chapter 28E and may assess and pay its portion of the cost of a public improvement as provided in this subchapter, but any requirement of this subchapter in respect to approval of detailed plans and specifications, calling for construction bids, awarding construction contracts and acceptance of the completed improvement may be carried out by each city with other cities, the state or any other political subdivision of the state, as provided in an agreement entered into as permitted by chapter 28E. However, an agreement between the city and the state department of transportation is also governed by the provisions of sections 313.21 through 313.23.
Iowa Code § 384.76
Referred to in §357E.11A