Browse Items (2 total) Tags: Boat House Browse All Browse by Tag Search Items Sort by: Title Creator Date Added Photographs of the Decatur Boat House Photographs of the Decatur Boat House while under construction. Tags: boat, Boat House, Construction, Decatur IL, house, lake, Lake Decatur, Photo File: Lake Decatur Photographs of Boat Houses along the Sangamon River Photographs of boat houses along the Sangamon River before the valley was flooded to create Lake Decatur. Tags: 1916, boat, Boat House, Cabin, Decatur IL, house, lake, Lake Decatur, Photo File: Lake Decatur, River, Sangamon, Sangamon River Featured Item Photos of Horse Drawn Delivery. Photographs of Horse Drawn Milk Wagons, 6 Horse Hitch, Stables 500 Block E. Prairie, Decatur, IL.