November 26, 1924 The Bear Mountain Bridge in southeastern New York was officially dedicated. This suspension bridge crosses the section of the Hudson River between Bear Mountain Park in Orange County and the town of Cortlandt in Westchester County.  At the time of its debut, this structure was the world’s longest suspension bridge -- a... Continue Reading →

June 24, 1850 A major milestone for a lighthouse in Maine took place when a contract was officially entered into for rebuilding that navigational aid’s tower. This lighthouse is on Monhegan Island, which is located about 12 nautical miles (22 kilometers) off the state’s mainland coast.    The call for proposals to replace Monhegan Island... Continue Reading →

February 11, 1933 In Allegheny County, a suspension bridge built in Pittsburgh’s South Side was opened to traffic without any formality or notable amount of fanfare.  This bridge’s low-key debut was reported in the next day’s edition of the Pittsburgh Press. “Undedicated and without ceremony, the county’s new bridge across Monongahela River at Tenth Street... Continue Reading →

January 31, 1901 In the northern part of the Massachusetts island of Nantucket, operations began for the current version of a lighthouse at Brant Point on the south side of the island’s harbor. (Nantucket is approximately 30 miles [48 kilometers] south of the Bay State’s Cape Code peninsula.) The New York Times provided details about... Continue Reading →

December 24, 1915 At 4:00 p.m., a recently finished masonry arch bridge in northwest Washington, D.C., made its ceremony-free debut. This Christmas Eve opening was authorized by U.S. Army Major Charles W. Kutz (1870-1951), the military civil engineer member of the three-person Board of Commissioners that governed the city at that time. The completion of... Continue Reading →

October 24, 1856 In the northern part of Lake Superior in Michigan’s Upper Peninsula region, Mark Petty arrived at Rock Harbor at Isle Royale to serve as the first keeper of a newly completed lighthouse there. He was accompanied by his brother Michael, who would serve as Rock Harbor Lighthouse’s first assistant keeper. This lighthouse... Continue Reading →

August 30, 1849 In the Acushnet River in southeastern Massachusetts, a lighthouse at the entrance to the harbor of the city of New Bedford first went into service. This navigational aid was installed at Palmer Island, which is on the west side of the route into New Bedford Harbor. Palmer Island Light was built by... Continue Reading →

January 16, 1932 The Arlington Memorial Bridge, crossing the Potomac River and linking Virginia with Washington, D.C., was opened. A caravan of 12 automobiles became the first vehicles to travel over this stone, steel, and neoclassical masonry arch bridge. The first of these automobiles transported President Herbert Hoover (1874-1964) and First Lady Lou Henry Hoover (1874-1944). While... Continue Reading →

December 10, 1910 The Hawthorne Bridge in Portland, Oregon, was officially opened to traffic. This bridge had been designed by Waddell & Harrington and, as part of the inaugural festivities, C.K. Allen from that engineering firm formally recommended acceptance of the new structure to the city. Portland Mayor Joseph Simon responded by declaring, “Let it open!”   This... Continue Reading →

October 25, 1892 A lighthouse built at the northern tip of Michigan’s Lower Peninsula and along the Straits of Mackinac was first lit. This structure, which is known as Old Mackinac Point Light, is specifically located at the junction of Lake Michigan and Lake Huron -- one of the busiest areas for vessels in the... Continue Reading →

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