This is a general elevation drawing, plus end view of both towers. The suspended car transfer is in the center of the bridge drawing over the canal. Dimensions are included for the distance from the water to the bottom of the bridge span (135 feet) and the footings. The drawing shows small stone and gravel fill near and around the concrete footings at the base of each tower. The finials are shown in detail. Lake Avenue is shown from one tower to the other. Drawing H-5421A, U.S. Patent February 1903.
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
There are three drawn details: end view, part side elevation, lateral bracing in horizontal plane. The towers are the two end parts of the bridge that hold the central span and the suspended car. The towers are referred to as North and South. The South Tower is nearer to Minnesota Point, the North Tower is on the "mainland." Drawing 167, Sheet M11.
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
Detailed drawing of the suspended car, or gondola, and the vertical structure that holds it. This is the element that moves from one side of the bridge to the other above the canal. This transfer car could hold vehicles and people. Normal speed of the car was 4 miles per hour; it made the trip in about 1 minute. This drawing includes dimensions of individual structural elements such as braces. Drawing 160, Sheet M4. Turner is identified as engineer, 816 Phoenix Building Duluth.
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
Technical details and named parts of the suspended car and its supporting structure for the bridge's builders. Included on the drawing are dimensions, rivet poles, braces, center lines, bolt connections, plates, trusses, knee brace, hanger roll. Drawing 161, Sheet M5.
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
Two detailed drawings of the car, or gondola, which carried vehicles and people across the canal. The drawing shows etched glass, punctured decorative steel plates, electric light fixtures, seats with perforated wood bottoms, maple flooring, glass paneled doors, lattice rail, copper flashing, wire supports, wire ropes, dimensions, floor beams, pine planks, and oak flooring. Drawing 162 Sheet M6.
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
A side elevation of the car, or gondola, which carried vehicles and people across the canal. The drawing shows: decorative circular metal plate with the word Duluth and floral-like details, wooden wall with windows, open lattice feature. Plan of strut is drawn as a detail for the bridge builders. Drawing 163, Sheet M7.
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
The Claude Turner design for the original Aerial Bridge from 1901. Many companies and designers vied for this project. The bridge was built in 1904-1905. This drawing shows the spires and steel structural detail as well as the concrete footings and dimensions. Both towers are shown with an end view. In 1929 the suspended car transfer was eliminated and a lift span was installed.
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
The Cedar Avenue Bridge, Eagan Minnesota was constructed in 1890 and connected Dakota and Hennepin Counties over the Minnesota River. The Dakota County portion of the bridge was removed upon the completion of the new bridge in 1980. Del Stelling worked as a newspaper reporter and photographer, covering Savage, Burnsville, Eagan and other areas of Dakota County, Minnesota from 1959 - 1984.
First bridge over the Mississippi River that connected Anoka and Champlin, MN. The original bridge was constructed in 1884 and stood until 1929 when the current Anoka-Champlin bridge was completed.
Looking northwest at the two Anoka-Champlin bridges that span the Mississippi River. The new bridge was completed in 1929 and is located in front of the older bridge. The bridge connects Anoka to Champlin.
Image of a group of men leveling the ground behind a steam powered machine. A man appears in the foreground, seated on a second piece of equipment. Bridge over the Beaver River near Beaver Bay, Minnesota. Completed during the Trunk Highway 1 project, now known as Scenic Highway 61.
Image of new steel bridge over Beaver River near Beaver Bay, Minnesota. Completed during the Trunk Highway 1 project, now known as Scenic Highway 61. A second, older bridge appears beneath the new bridge. Grand opening of the highway was celebrated in 1925, construction north of Two Harbors began 1922.
Whaleback is an unusual ship design with steel hulls (body of the vessel) and rounded decks (boat, hurricane, main -which is the lowest full-length deck in a ship's hull, and spar are all decks at different levels) which was introduced by the inventor Captain Alexander McDougall of Duluth in 1888. It was a very stable vessel. American Steel Barge Company, a New York corporation engaged in shipbuilding and transportation on the Great Lakes as well as on the Atlantic and Pacific coasts, purchased all of the patents for McDougalls whaleback vessels for $25,000. The only remaining whaleback is the Meteor, which is now a museum at Barker's Island in Superior, Wisconsin.
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
This photograph may have been shot from Seventh Street and about Lake Avenue. The bright narrow strip in the lower middle of the image is Lake Avenue leading to the Aerial Bridge. The rectangle and three dots parallel to the piers of the canal are the remnants of the Whitney rock crushing enterprise. The Whitney Brothers, of Superior, Wisconsin, had a sand and gravel processing business that was functioning in 1919. The concrete form that is still in the water was the dredging/crushing building. A tunnel ran from the building to the Point. There was a conveyor belt and railroad spur adjacent to the concrete building. Sand from the Apostle Islands and gravel from Grand Marais were carried to Duluth on a small vessel named Limit. The business also used a tug the William A. Whitney. The Limit was secured to the concrete building and the load of sand or gravel was unloaded into the steel hopper using a jaw-like clam shell, steam powered device. The belt conveyed the materials to shore and it dropped into a tunnel where trucks were ready. On Federal lake charts it is referred to as cribs. Telephone lines are in this photograph. In 1880, the first telephones were installed in Duluth by Walter Van Brunt for C. H. Graves and Company. In 1881, the Duluth Telephone Company was incorporated with $10,000 capital. In 1882, the first telephone directory was issued for 30 subscribers. In 1898, long distance lines between Duluth, Cloquet and Carlton were strung. In 1899, Duluth had 794 telephones. In 1900, the Zenith telephone Company (independent) started operations in competition with Duluth Telephone Company. The tower is the Central High School clock tower. The 1892 school has been the Central Administration Building for ISD 709 since the late 1970s.
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections