Iowa Code § 573.20: Converting property into money.

When it appears that the unpaid portion of the contract price for the public improvement, or a part thereof, is represented in whole or in part, by property other than money, or if a deposit has been made in lieu of a surety, the court shall have jurisdiction thereover, and may cause the same to be sold, under such procedure as it may deem just and proper, and disburse the proceeds as in other cases.