The left lane on W. 1st Street will be closed between Bluff and Locust until further notice. Motorists will need to follow the posted detour route. Map available at www.cityofdubuque.org/detours . If you have questions regarding this closure/detour, please contact the City of Dubuque Engineering Department at 563-589-4270. Please note: closure dates/times are estimates and are subject to change without notification based on weather and contractor schedules.