The city of Des Moines plans to remove the north and east skywalk corridors that run inside the parking garage at Ninth and Locust streets, as well as the elevators at the northeast and southwest corners of the garage. Skywalk corridors will remain on the south and west sides of the structure, as well as the skywalk bridges that connect with them. Elevators will remain at the northwest and southeast corners. The move will save at least $750,000 in the cost to replace heating, ventilation and cooling systems for the corridors and is expected to free up space for about 30 more parking spaces, which could generate an additional $48,600 in annual parking revenue, according to a staff report to the City Council. The council will vote during today’s meeting on a $56,000 no-bid professional services agreement with Brooks Borg Skiles Architecture Engineering LLP for design and construction services on the project. Removing the corridors and elevators will cost an estimated $500,000. The ramp is the only structure along the skywalk network that has skywalk corridors on all four sides, according to the staff report.