RedactedNarrative: Operator stated that while cruising in Lake Michigan headed back toward the Chicago Harbor Lock, he lost sight of the break wall due to back-lighting from the City''s skyline. Operator stated that he was unable to see the break-wall and struck the break-wall causing his vessel to run aground and become high centered on the wall. Operator used 911 to report his accident and the Chicago Police Marine Unit responded. Chicago Police Marine Unit officers arrived to find the vessel on the break wall, with no part of the vessel touching the water. Chicago Police Unit officers rafted the break-wall and proceeded to rescue the passengers from the vessel and onto the CPD boat. None of the passengers stated that they were injured and all refused medical treatment and transport when asked by CPD officers. TowBoat US arrived to remove the boat from the break wall and Operator had the boat taken to "Service 1 Marine" in LaPorte, IN. for damage appraisal. All passengers were taken to CPD Marine Unit HQ at the Chicago Marine Safety Station in DuSable Harbor. When speaking with Operator, his initial estimate of the damage cost was $30,000.00 USD. Operator also stated that while waiting for "Service 1 Marine" to come for the vessel it sustained some damage while sitting along Navy Pier (Towed to Navy Pier by TowBoat US). There is no further information to report at this time.