The Des Moines City Council on Monday approved terminating a minimum assessment agreement between the city of Des Moines and Wells Fargo for property at 801 Walnut St. The agreement needed to be terminated before the property can be sold. A Wells Fargo spokesperson has confirmed that the company is working with a single buyer on the purchase of the Walnut Street property and four other downtown parcels. The city document stated that the buyer’s acquisition of the properties is expected to close in January. Also Monday, the council extended the construction timeline of a $22 million, 108,000-square-foot mixed-use development project proposed on the southeast corner of 25th Street and Carpenter Avenue across from Drake University. Construction is now expected to begin by March 31.