J.A.L. Waddell, Consulting Engineer (1887)

Waddell's private consultancy gained a reputation for "daring and unusual structures" with a modern approach to the bridge design, and construction process.^[1]: 63 The company's first project, the Illinois Central Missouri River Bridge, was a swing bridge designed by Waddell in 1893 and built across the Missouri River. At the time of its construction, it was the longest swing bridge in the world with a moving span of 520 ft (158.5 m).^[2]

A year later in 1894, Waddell designed the South Halsted Street Bridge over the Chicago River. As the world's first major vertical-lift bridge, the project had a significant impact on infrastructure design.^[1]: 63

Waddell and Hedrick, Consulting Engineers (1899)

In 1899 Waddell promoted his chief draftsman Ira G. Hedrick to partner, renaming the firm Waddell & Hedrick.^[3] This partnership produced what would become the company's oldest design still in operation as of 2021: the New Westminster Bridge.

Waddell and Harrington (1907)

In 1907 the company became known as Waddell & Harrington when Waddell partnered with John L. Harrington, former Chief Engineer of the Locomotive & Machine Company of Montreal.^[3] While still headquartered in Kansas City, the firm also maintained offices in Portland, Oregon, and Vancouver, British Columbia.^[4]

In 1908 Waddell & Harrington patented an improved Bascule bridge.^[5] That summer they also filed the first of several patents for improvements to Waddell's earlier vertical-lift bridge designs,^[6][7]

In their time together, Waddell & Harrington designed at least thirty highway and railroad bridges,^[8][9] and four remain in operation as of 2021 (three of them in the iconic vertical-lift style): Hawthorne Bridge (1910), ASB Bridge (1911), Colorado St. (Arroyo Seco) Bridge (1913), and Murray Morgan Bridge (1913).^[10]

In 1914, Waddell & Harrington announced the dissolution of their partnership effective in July of the following year.^[11]: 923 Harrington would continue working with his colleague, draftsman Frank Cortelyou, in new firm known as Harrington, Howard & Ash (which would eventually become HNTB).^[3][12]

Waddell and Son (1915)

In 1915, Waddell promoted Needham Everett to junior partner, renaming the firm Waddell & Son. That same year, they celebrated the opening of the LS&MS Railway Bridge No. 6 in Chicago, IL,^[10] and a satellite office in New York City, though the younger Waddell reportedly stayed behind to manage the Kansas City office through at least 1918.^[13] In 1916, Shortridge Hardesty (who had previously been hand-picked to join the firm shortly after his 1908 graduation from Rensselaer Polytechnic Institute^[14]: 63) was promoted to Designing Engineer.^[15]

The firm did well, receiving many contracts during the post-war economic revival,^[10] and the New York office became its headquarters in 1920.

Needham Everett died in 1927.

Waddell and Hardesty (1927)

After the death of his son, Waddell continued to lead the firm, promoting Hardesty to Partner.^[16] They continued to create important bridges; the CRRNJ Newark Bay Bridge (1926), original Goethals Bridge and Outerbridge Crossing (1928), and Marine Parkway Bridge (1937). In 1931 Waddell was personally honored with the American Association of Engineers' Clausen Gold Medal award for "distinguished service to the engineering profession",^[17] and again in 1937 with the American Society of Civil Engineers (ASCE) Norman Medal. He died in 1938 at the age of 84,^[18] leaving Hardesty to run the company.

Hardesty & Hanover (1945)

In 1945, Hardesty took on Clinton Hanover (former Chief of the New York City Bureau of Bridge Design) as a partner.^[3] The duo's leadership saw completion of the Rainbow Bridge in 1941. Spanning Niagara Falls, the structure was honored with the 1941 American Institute of Steel Construction (AISC) 1st Place "Class A" Prize Bridge Award for beauty.^[19]

In the following decades, the company developed many other moveable and fixed bridges across New York State and beyond. One of its earliest forays into moveable architecture was an amusement ride for the 1964 New York World's Fair that took the form of a Ferris wheel, known as the Uniroyal Giant Tire.^[20]

Among H&H's first highway projects was the Interstate 80 and Route 19 interchange in Paterson, New Jersey.^[10] The company has continued to design roadways, most recently the reconstruction of LaGuardia Airport and Kew Gardens Interchange. The latter project features NEXT Beam technology in one of its 15 bridges.^[21]

H&H (2022)

In 2022, Hardesty & Hanover unveiled a new corporate brand & logo that complements recent company growth. Going forward, branding will identify the firm as H&H, with Hardesty & Hanover, LLC remaining the legal name. In 2022, the firm also received notification from the United States Patent and Trademark Office that the firm had been awarded a trademark designation for the key phrase “Designed to Amaze, Engineered to Last®” which had been used across the firm for more than four years.  While the firm and our employees have multiple patents, this is the first trademark awarded to H&H. With 600 employees, the firm has 33 offices in the US and the UK.