Thompson Boat House Dock. 5-1/2" x 3-1/2" black and white postcard photograph of several men standing on the dock of Thompson Boat House with fishing poles; several people near boat house; boats and boathouse; postcard identified on the front as #7. Boat House at Clear Lake, Waseca, Minn.; Thompsons Boat House was originally built in March 1910 by Nate Thompson, Charles Grant and H. A. Starr.