Displaying results 181 of 200 - 256
Date Image Innovation City State Country
1909 Gunnison Tunnel Gunnison Tunnel Montrose CO USA
1902 Rockville Stone Arch Bridge Rockville Stone Arch Bridge Marysville PA USA
1830-1860 Five Stone Arch Bridges Five Stone Arch Bridges Hillsborough NH USA
1922 Miami Conservancy District Miami Conservancy District Huber Heights OH USA
1882 Durango and Silverton Narrow Gauge railway runs along the Highline. Durango-Silverton Branch of the D&RGW RR Durango CO USA
1929 Navajo Bridge Navajo Bridge Page AZ USA
1855 Whipple Truss Bridge Whipple Truss Bridge Schenectady NY USA
1909-1914 Cape Cod Canal Cape Cod Canal Cape Cod MA USA
1866 John A. Roebling Bridge John A. Roebling Bridge Cincinnati OH USA
1899 Snoqualmie Falls Cavity Generating Station Snoqualmie Falls Cavity Generating Station Snoqualmie WA USA
1933-1941 Colorado River Aqueduct Colorado River Aqueduct CA USA
1911 Theodore Roosevelt Dam Theodore Roosevelt Dam & Salt River Project Tonto National Forest AZ USA
1728-1821 Emanuel Bowen's 1747 map showing the boundary between Virginia and North Carolina. Royal Colonial Boundary of 1665 Middlesboro KY USA
1938 Bonneville Dam, Columbia River System Bonneville Dam, Columbia River System Portland OR USA
1910 Fritz Engineering Laboratory Fritz Engineering Laboratory Bethlehem PA USA
1801 Philadelphia Municipal Water Supply Philadelphia Municipal Water Supply Philadelphia PA USA
1864-1869 Chesbrough's Water Supply System Chesbrough's Water Supply System Chicago IL USA
1940s Howard Clifford running off the Tacoma Narrows Bridge during collapse Tacoma Narrows Bridges Tacoma WA USA
750-1180 Prehistoric Mesa Verde Reservoirs Prehistoric Mesa Verde Reservoirs Montezuma County CO USA
1880 Cumbres and Toltec Scenic Railway Cumbres and Toltec Scenic Railway Antonito CO USA

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