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
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
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
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
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
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
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
This drawing identifies wind forces and their effects on the physical structure. Notes are included on this drawing for example: "Stresses in lower sections of tension diagonals equal or smaller than top sections, but same riveting to be used in detail." The drawing includes a key for live load, dead load, impact, wind at 150 pounds per linear foot, wind stress due to traveler, equivalent to live load. The drawing shows top and bottom laterals. Total weight of the carrier and car is given as 240,000 pounds. The scale is given as 20 feet equaling one inch. Drawing H5421, Sheet 3.
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
Detailed drawing of four parts of the Aerial Bridge. The end view is a drawing of a tower; part side elevation is of half of the Aerial Bridge with the suspended car transfer. The third drawing is called Section A-A and depicts a tower without the cross structures drawn in. The last drawing is called Section B-B, which is a top down view of one of the towers resting on its footings. All of these drawings have dimensions. The part side elevation includes a very small drawing of the side of the gondola car. The end view includes the phrase "car approaches built by city." The finials are shown on three of the four drawings. Drawing H5421, Sheet 2.
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
The caption of this post card says Clear span, 400 feet; clear height, 136 feet; total height above water, 186 feet. This view shows the waterfront when it was warehouses and wharves, docks, railroad freight sheds and slips. This view is probably from Skyline boulevard which, at this time, would have been called Rogers' Boulevard. William Rogers was the first parks department commissioner. In December 1959 the Duluth City Council and Mayor E. Clifford Bork changed the name of Rogers parkway and Skyline Boulevard to Skyline Parkway.
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
Aerial bridge under construction; Wenisch and Bourgeault cut stone contractors sign; steamer exiting harbor through canal; light house on south pier near bridge
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
This post card was mailed in 1906, but the image is from an earlier year. In the 1890s commercial fishing on Lake Superior was feeding Duluth and the entire Midwest with major operators: A. Booth and Sons (whose sign is visible at the left), Lake Superior Fish Company, H. Christiansen and Sons.
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
Aerial bridge from bay; boats entering; canal; piers; Minnesota Point buildings on both sides; houses; light house on south pier; Corps of Engineers building.
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
The post card caption says The Aerial Bridge, Span 393 feet 9 inches, 135 feet high from water line. Cost $100,000. This post card illustration is of a view from the waterfront. At the right is the South Breakwater Inner Light Tower. Houses on Minnesota Point are at the far right. Engineer C.A.P. Turner, of the Gillette-Herzog Manufacturing Company of Minneapolis, designed the Ferry Bridge with Suspended Car Transfer in February 1901, meeting federal specifications. Bids were opened March 25, 1901, but only one was received. The Duluth Canal Bridge Company was awarded the contract but abandoned the work. In February, 1904, the Modern Steel Structural Company of Waukesha, Wisconsin was issued a contract. Work began July 20, 1904.
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
The post card caption says The Aerial Bridge, Span 393 feet 9 inches, 135 feet high from water line. Cost $100,000. This post card illustration is of a view from the Duluth harbor with the U.S. Army Corps of Engineers Building at the left and the South Breakwater Inner Light Tower at the right. Houses on Minnesota Point are at the far right. Engineer C.A.P. Turner, of the Gillette-Herzog Manufacturing Company of Minneapolis, designed the Ferry Bridge with Suspended Car Transfer in February 1901, meeting federal specifications. Bids were opened March 25, 1901, but only one was received. The Duluth Canal Bridge Company was awarded the contract but abandoned the work. In February, 1904, the Modern Steel Structural Company of Waukesha, Wisconsin was issued a contract. Work began July 20, 1904. The aerial bridge transporter or gondola or transfer car roadway was 17 feet by 50 feet with sidewalks seven feet by 50 feet; the cabins were 30 feet long.
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
The Hugh C. Leighton Co., Manufacturers, Portland, ME.
Date Created:
1910?
Description:
During storms water from waves collect in the piers which are designed with drainage gaps so the water runs back into the canal. Here, there is melted snow and a small pack of snow at the base of the pier's walkway that blocks the drainage.
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
The caption says The Aerial Bridge Span 393 feet 9 inches, 135 feet high from water line, cost $100,000 Duluth, Minn. A few more details that are not on this card are that the Aerial Bridge was completed in February, 1905. The Aerial Bridge transporter or gondola or transfer car roadway was 17 feet by 50 feet with sidewalks seven feet by 50 feet and the cabins were 30 feet long. This original bridge was modified with the lift span in 1929 and first operated March 19, 1930.
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
Every student in Duluth learned about the aerial bridge from family or teachers. This table-top model in clay is typical in demonstrating how central to children and families the structure and impact of the bridge was and is to residents of Duluth.
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
Ore boat leaving Duluth. Detroit Publishing Co. was a prolific post card publisher, especially in the U.S. Their cards were published from 1898 to 1933. Using a color process called Phostint, their cards were considered to be very artistic. The hobby of collecting post cards is called deltiology. The first post card was issued by the Austrian government, America's first postcards came out in 1873. Picture postcards were introduced later. The golden age of postcards was supposed to date from 1907 through the first World War.
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
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
The Chicago Shipbuilding Company of Chicago, a subsidiary of the American Shipbuilding Company, built the steamer William E. Cory for the Pittsburgh Steamship Company in 1904. The vessel dimensions are 569' X 56' X 31'. She sailed from Chicago on her maiden voyage August 12, 1905 bound for Duluth to load iron ore. The aerial bridge was new. Bids were opened March 25, 1901, but only one was received. The Duluth Canal Bridge Company was awarded the contract but abandoned the work. In February 1904, the Modern Steel Structural Company of Waukesha, Wisconsin was issued a contract. Work began July 20, 1904. On February 23, 1905, with local dignitaries at hand, the bridge was first operated. Regular service began the next day according to newspaper accounts. The city engineer's report for 1905 stated that the bridge was "completed and commenced operation on May 5, 1905, and a few problems were corrected in running the bridge over the next few days." The Aerial bridge was completed in February 1905. The aerial bridge transporter or gondola or transfer car roadway was 17 feet by 50 feet with sidewalks seven feet by 50 feet, the cabins were 30 feet long. The U.S. Army Corps of Engineers office building with flag above it was built in 1906. Also visible in the image are the National Biscuit Company 517 Lake Avenue South, Blanchet Hotel 520 Lake Avenue South, and Wieland Flats 502-512 St. Croix Avenue
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
Spectators watch log rollers in the bay. The Duluth Boat Club was organized July 10, 1886. The original building was built in 1891 at the foot of Seventh Avenue West and the bay front. This, the second facility, was built in 1906 at 1000 Minnesota Avenue on the harbor side. This was a social center of Duluth but you did have to buy a membership. It had nearly 200 rowboats, canoes, and a flotilla of sailboats. Duluth rowers won 20 national championships between 1911 and 1923, as well as hosting the national races in 1916. The club dissolved in 1926 due to flagging interest and debt.
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
The Duluth Boat Club was organized July 10, 1886. The original building was built in 1891 at the foot of Seventh Avenue West and the bay front. This, the second facility, was built in 1906 at 1000 Minnesota Avenue on the harbor side. This was a social center of Duluth but you did have to buy a membership. It had nearly 200 rowboats, canoes, and a flotilla of sailboats. Duluth rowers won 20 national championships between 1911 and 1923, as well as hosting the national races in 1916. The club dissolved in 1926 due to flagging interest and debt.
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
Passenger steamer North American of the Georgian Bay Line is steaming out of Duluth harbor leaving Duluth. There were many passenger ships and companies used similar names. This vessel had a partner named the South American; both were built in 1913. The Great Lakes is one of the oldest, yet one of the newest cruise destinations. Cruises were being taken as early as 1842, yet the industry had almost disappeared 100 years later. Railroads bought and built steamship lines to compliment railroad services. Some activity continued into the 1960s, but following the departure of the South American in 1966, cruising effectively ceased for thirty years. Houses on Minnesota Point are at the left. The Aerial Bridge gondola or basket transporter is visible behind the stern. These lamp posts on the piers remained until about 1955. This is a print made from a broken glass plate negative: the bottom right corner is missing (black). The photographer's negative number is cut off, only the beginning of his name shows "McK."
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
The suspended car transfer was replaced in 1929 with the Aerial Lift Bridge span. The building at the left is the wholesale grocer Gowan Lenning Twohy.
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
The caption of this post card says The Aerial Bridge, Span 393 feet 9 inches, 135 feet high from water line. Cost $100,000. Entrance to Duluth-Superior Harbor. The white building at the left is the U.S. Army Corps of Engineers Building constructed in 1906.
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
In 1893, James J. Hill's Northern Steamship Company built 385-foot ocean style passenger steamers. In 1911, the peak year, 80,000 passengers traveled to Lake Superior. After 1920, the number of passenger cruise ships diminished with the advent of "motor-cars." Very few cruise ships were still in service after World War II. The Canadian steel steamer Huronic was constructed in Collingwood, Ontario, in 1902. She ran on the Northern Navigation Division of the Canadian Steamship Company, on cruise trips from Detroit to Duluth. In 1940, the Huronic was dismantled and made into a package freighter.
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
Every student in Duluth learned about the Aerial Bridge from family or teachers. This table-top model in clay is typical in demonstrating how central to children and families the structure and impact of the bridge was and is to residents of Duluth.
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
Set of 37 sheets of architectural drawings accepted for the City of Duluth by Samuel F. Snively, Mayor, and John Wilson, City Engineer, Plans Accompanying Specifications of January 1929. Technical drawings with varying degrees of legibility. There is only one elevation in the set; Sheet 1. The original bridge was the Aerial Bridge constructed in 1904-1905. The bridge was modified in 1929 with a lift span and subsequently called the Aerial Lift Bridge. These plans are highly technical and were designed for the use of engineers and specialty contractors. Each drawing indicates that certain features of the structure have been revised. This set appears to represent the final revision. The Lift Bridge was designed by Harrington, Howard and Ash Consulting Engineers, Kansas City and New York. Patented in the United States from 1909-1925.
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
Construction shot of the bridge and the approach to the bridge from Minnesota Point or South Lake Avenue, Minnesota Avenue. This photograph has been physically altered; the background has been whited out and buildings drawn over.
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections