Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Route No. 1, Overton-Lake Mead Road, Gutters, 6 miles south of Overton...
Significance: The Route No.1 Overton-Lake Mead Road contributed significantly to National Park Service development of the Lake Mead National Recreation Area beginning in 1938. Stone masonry gutters along the r... More
Route No. 1-Overton-Lake Mead Road, Between Overton Beach & Park Bound...
Significance: It contributed significantly to National Park Service development of the Lake Mead National Recreational Area beginning in 1938 when the area was opened to recreational use. Drainage features alon... More
Route No. 1-Overton-Lake Mead Road, Culverts and Headwalls, 6 miles so...
Significance: The Route No. 1 Overton-Lake Mead Road contributed significantly to National park Service development of the Lake Mead National Recreation Area beginning in 1938. Stone masonry culvert headwalls a... More
Liberty Memorial Bridge, Spanning Missouri River at I-94, Bismarck, Bu...
Significance: The Liberty Memorial Bridge is a three-span, Warren-Turner through truss bridge, a variation of the Warren through truss designed by C.A.P. Turner. This was the first highway bridge over the Miss... More
Liberty Memorial Bridge, Spanning Missouri River at I-94, Bismarck, Bu...
Significance: The Liberty Memorial Bridge is a three-span, Warren-Turner through truss bridge, a variation of the Warren through truss designed by C.A.P. Turner. This was the first highway bridge over the Miss... More
Liberty Memorial Bridge, Spanning Missouri River at I-94, Bismarck, Bu...
Significance: The Liberty Memorial Bridge is a three-span, Warren-Turner through truss bridge, a variation of the Warren through truss designed by C.A.P. Turner. This was the first highway bridge over the Miss... More
Liberty Memorial Bridge, Spanning Missouri River at I-94, Bismarck, Bu...
Significance: The Liberty Memorial Bridge is a three-span, Warren-Turner through truss bridge, a variation of the Warren through truss designed by C.A.P. Turner. This was the first highway bridge over the Miss... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Route No. 1, Overton-Lake Mead Road, Gutters, 6 miles south of Overton...
Significance: The Route No.1 Overton-Lake Mead Road contributed significantly to National Park Service development of the Lake Mead National Recreation Area beginning in 1938. Stone masonry gutters along the r... More
Route No. 1-Overton-Lake Mead Road, Culverts and Headwalls, 6 miles so...
Significance: The Route No. 1 Overton-Lake Mead Road contributed significantly to National park Service development of the Lake Mead National Recreation Area beginning in 1938. Stone masonry culvert headwalls a... More
Route No. 1-Overton-Lake Mead Road, Culverts and Headwalls, 6 miles so...
Significance: The Route No. 1 Overton-Lake Mead Road contributed significantly to National park Service development of the Lake Mead National Recreation Area beginning in 1938. Stone masonry culvert headwalls a... More
Liberty Memorial Bridge, Spanning Missouri River at I-94, Bismarck, Bu...
Significance: The Liberty Memorial Bridge is a three-span, Warren-Turner through truss bridge, a variation of the Warren through truss designed by C.A.P. Turner. This was the first highway bridge over the Miss... More
Liberty Memorial Bridge, Spanning Missouri River at I-94, Bismarck, Bu...
Significance: The Liberty Memorial Bridge is a three-span, Warren-Turner through truss bridge, a variation of the Warren through truss designed by C.A.P. Turner. This was the first highway bridge over the Miss... More
Route No. 1 Overton-Lake Mead Road, Dikes & Ditches, Between Overton B...
Significance: The Route No.1 Overton-Lake Mead Road contributed significantly to National Park Service development of the Lake Mead National Recreation Area beginning in 1938. Dikes and ditches were a critical ... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Route No. 1-Overton-Lake Mead Road, Culverts and Headwalls, 6 miles so...
Significance: The Route No. 1 Overton-Lake Mead Road contributed significantly to National park Service development of the Lake Mead National Recreation Area beginning in 1938. Stone masonry culvert headwalls a... More
Route No. 1-Overton-Lake Mead Road, Culverts and Headwalls, 6 miles so...
Significance: The Route No. 1 Overton-Lake Mead Road contributed significantly to National park Service development of the Lake Mead National Recreation Area beginning in 1938. Stone masonry culvert headwalls a... More
Liberty Memorial Bridge, Spanning Missouri River at I-94, Bismarck, Bu...
Significance: The Liberty Memorial Bridge is a three-span, Warren-Turner through truss bridge, a variation of the Warren through truss designed by C.A.P. Turner. This was the first highway bridge over the Miss... More
Liberty Memorial Bridge, Spanning Missouri River at I-94, Bismarck, Bu...
Significance: The Liberty Memorial Bridge is a three-span, Warren-Turner through truss bridge, a variation of the Warren through truss designed by C.A.P. Turner. This was the first highway bridge over the Miss... More
Liberty Memorial Bridge, Spanning Missouri River at I-94, Bismarck, Bu...
Significance: The Liberty Memorial Bridge is a three-span, Warren-Turner through truss bridge, a variation of the Warren through truss designed by C.A.P. Turner. This was the first highway bridge over the Miss... More
Liberty Memorial Bridge, Spanning Missouri River at I-94, Bismarck, Bu...
Significance: The Liberty Memorial Bridge is a three-span, Warren-Turner through truss bridge, a variation of the Warren through truss designed by C.A.P. Turner. This was the first highway bridge over the Miss... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Route No. 1-Overton-Lake Mead Road, Culverts and Headwalls, 6 miles so...
Significance: The Route No. 1 Overton-Lake Mead Road contributed significantly to National park Service development of the Lake Mead National Recreation Area beginning in 1938. Stone masonry culvert headwalls a... More
Liberty Memorial Bridge, Spanning Missouri River at I-94, Bismarck, Bu...
Significance: The Liberty Memorial Bridge is a three-span, Warren-Turner through truss bridge, a variation of the Warren through truss designed by C.A.P. Turner. This was the first highway bridge over the Miss... More
Liberty Memorial Bridge, Spanning Missouri River at I-94, Bismarck, Bu...
Significance: The Liberty Memorial Bridge is a three-span, Warren-Turner through truss bridge, a variation of the Warren through truss designed by C.A.P. Turner. This was the first highway bridge over the Miss... More
Liberty Memorial Bridge, Spanning Missouri River at I-94, Bismarck, Bu...
Significance: The Liberty Memorial Bridge is a three-span, Warren-Turner through truss bridge, a variation of the Warren through truss designed by C.A.P. Turner. This was the first highway bridge over the Miss... More
Liberty Memorial Bridge, Spanning Missouri River at I-94, Bismarck, Bu...
Significance: The Liberty Memorial Bridge is a three-span, Warren-Turner through truss bridge, a variation of the Warren through truss designed by C.A.P. Turner. This was the first highway bridge over the Miss... More
Boundary Channel Bridge, Spanning Boundary Channel, Washington, Distri...
Significance: Boundary Channel Bridge is unique among the other bridges erected along the Mount Vernon Memorial Highway. It consists of seven reinforced concrete cantilever girders and two exterior girders of ... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Route No. 1, Overton-Lake Mead Road, Gutters, 6 miles south of Overton...
Significance: The Route No.1 Overton-Lake Mead Road contributed significantly to National Park Service development of the Lake Mead National Recreation Area beginning in 1938. Stone masonry gutters along the r... More
Route No. 1, Overton-Lake Mead Road, Gutters, 6 miles south of Overton...
Significance: The Route No.1 Overton-Lake Mead Road contributed significantly to National Park Service development of the Lake Mead National Recreation Area beginning in 1938. Stone masonry gutters along the r... More
Route No. 1-Overton-Lake Mead Road, Culverts and Headwalls, 6 miles so...
Significance: The Route No. 1 Overton-Lake Mead Road contributed significantly to National park Service development of the Lake Mead National Recreation Area beginning in 1938. Stone masonry culvert headwalls a... More
Liberty Memorial Bridge, Spanning Missouri River at I-94, Bismarck, Bu...
Significance: The Liberty Memorial Bridge is a three-span, Warren-Turner through truss bridge, a variation of the Warren through truss designed by C.A.P. Turner. This was the first highway bridge over the Miss... More
Liberty Memorial Bridge, Spanning Missouri River at I-94, Bismarck, Bu...
Significance: The Liberty Memorial Bridge is a three-span, Warren-Turner through truss bridge, a variation of the Warren through truss designed by C.A.P. Turner. This was the first highway bridge over the Miss... More
Liberty Memorial Bridge, Spanning Missouri River at I-94, Bismarck, Bu...
Significance: The Liberty Memorial Bridge is a three-span, Warren-Turner through truss bridge, a variation of the Warren through truss designed by C.A.P. Turner. This was the first highway bridge over the Miss... More
Boundary Channel Bridge, Spanning Boundary Channel, Washington, Distri...
Significance: Boundary Channel Bridge is unique among the other bridges erected along the Mount Vernon Memorial Highway. It consists of seven reinforced concrete cantilever girders and two exterior girders of ... More
Boundary Channel Bridge, Spanning Boundary Channel, Washington, Distri...
Significance: Boundary Channel Bridge is unique among the other bridges erected along the Mount Vernon Memorial Highway. It consists of seven reinforced concrete cantilever girders and two exterior girders of ... More
Boundary Channel Bridge, Spanning Boundary Channel, Washington, Distri...
Significance: Boundary Channel Bridge is unique among the other bridges erected along the Mount Vernon Memorial Highway. It consists of seven reinforced concrete cantilever girders and two exterior girders of ... More
Boundary Channel Bridge, Spanning Boundary Channel, Washington, Distri...
Significance: Boundary Channel Bridge is unique among the other bridges erected along the Mount Vernon Memorial Highway. It consists of seven reinforced concrete cantilever girders and two exterior girders of ... More
Route No. 1 Overton-Lake Mead Road, Dikes & Ditches, Between Overton B...
Significance: The Route No.1 Overton-Lake Mead Road contributed significantly to National Park Service development of the Lake Mead National Recreation Area beginning in 1938. Dikes and ditches were a critical ... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Route No. 1, Overton-Lake Mead Road, Gutters, 6 miles south of Overton...
Significance: The Route No.1 Overton-Lake Mead Road contributed significantly to National Park Service development of the Lake Mead National Recreation Area beginning in 1938. Stone masonry gutters along the r... More
Route No. 1-Overton-Lake Mead Road, Between Overton Beach & Park Bound...
Significance: It contributed significantly to National Park Service development of the Lake Mead National Recreational Area beginning in 1938 when the area was opened to recreational use. Drainage features alon... More
Route No. 1-Overton-Lake Mead Road, Between Overton Beach & Park Bound...
Significance: It contributed significantly to National Park Service development of the Lake Mead National Recreational Area beginning in 1938 when the area was opened to recreational use. Drainage features alon... More
Route No. 1-Overton-Lake Mead Road, Culverts and Headwalls, 6 miles so...
Significance: The Route No. 1 Overton-Lake Mead Road contributed significantly to National park Service development of the Lake Mead National Recreation Area beginning in 1938. Stone masonry culvert headwalls a... More
Liberty Memorial Bridge, Spanning Missouri River at I-94, Bismarck, Bu...
Significance: The Liberty Memorial Bridge is a three-span, Warren-Turner through truss bridge, a variation of the Warren through truss designed by C.A.P. Turner. This was the first highway bridge over the Miss... More
Liberty Memorial Bridge, Spanning Missouri River at I-94, Bismarck, Bu...
Significance: The Liberty Memorial Bridge is a three-span, Warren-Turner through truss bridge, a variation of the Warren through truss designed by C.A.P. Turner. This was the first highway bridge over the Miss... More
Boundary Channel Bridge, Spanning Boundary Channel, Washington, Distri...
Significance: Boundary Channel Bridge is unique among the other bridges erected along the Mount Vernon Memorial Highway. It consists of seven reinforced concrete cantilever girders and two exterior girders of ... More
Boundary Channel Bridge, Spanning Boundary Channel, Washington, Distri...
Significance: Boundary Channel Bridge is unique among the other bridges erected along the Mount Vernon Memorial Highway. It consists of seven reinforced concrete cantilever girders and two exterior girders of ... More
Route No. 1 Overton-Lake Mead Road, Dikes & Ditches, Between Overton B...
Significance: The Route No.1 Overton-Lake Mead Road contributed significantly to National Park Service development of the Lake Mead National Recreation Area beginning in 1938. Dikes and ditches were a critical ... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Route No. 1-Overton-Lake Mead Road, Culverts and Headwalls, 6 miles so...
Significance: The Route No. 1 Overton-Lake Mead Road contributed significantly to National park Service development of the Lake Mead National Recreation Area beginning in 1938. Stone masonry culvert headwalls a... More
Liberty Memorial Bridge, Spanning Missouri River at I-94, Bismarck, Bu...
Significance: The Liberty Memorial Bridge is a three-span, Warren-Turner through truss bridge, a variation of the Warren through truss designed by C.A.P. Turner. This was the first highway bridge over the Miss... More
Boundary Channel Bridge, Spanning Boundary Channel, Washington, Distri...
Significance: Boundary Channel Bridge is unique among the other bridges erected along the Mount Vernon Memorial Highway. It consists of seven reinforced concrete cantilever girders and two exterior girders of ... More
Boundary Channel Bridge, Spanning Boundary Channel, Washington, Distri...
Significance: Boundary Channel Bridge is unique among the other bridges erected along the Mount Vernon Memorial Highway. It consists of seven reinforced concrete cantilever girders and two exterior girders of ... More
Route No. 1 Overton-Lake Mead Road, Dikes & Ditches, Between Overton B...
Significance: The Route No.1 Overton-Lake Mead Road contributed significantly to National Park Service development of the Lake Mead National Recreation Area beginning in 1938. Dikes and ditches were a critical ... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Route No. 1-Overton-Lake Mead Road, Station Markers, 6 miles south of ...
Significance: The Route No. 1 Overton-Lake Mead Road contributed significantly to National Park Service development of the Lake Mead National Recreation Area beginning in 1938. Station Markers were established ... More
Route No. 1, Overton-Lake Mead Road, Gutters, 6 miles south of Overton...
Significance: The Route No.1 Overton-Lake Mead Road contributed significantly to National Park Service development of the Lake Mead National Recreation Area beginning in 1938. Stone masonry gutters along the r... More
Route No. 1-Overton-Lake Mead Road, Culverts and Headwalls, 6 miles so...
Significance: The Route No. 1 Overton-Lake Mead Road contributed significantly to National park Service development of the Lake Mead National Recreation Area beginning in 1938. Stone masonry culvert headwalls a... More
Route No. 1-Overton-Lake Mead Road, Culverts and Headwalls, 6 miles so...
Significance: The Route No. 1 Overton-Lake Mead Road contributed significantly to National park Service development of the Lake Mead National Recreation Area beginning in 1938. Stone masonry culvert headwalls a... More
Liberty Memorial Bridge, Spanning Missouri River at I-94, Bismarck, Bu...
Significance: The Liberty Memorial Bridge is a three-span, Warren-Turner through truss bridge, a variation of the Warren through truss designed by C.A.P. Turner. This was the first highway bridge over the Miss... More
Liberty Memorial Bridge, Spanning Missouri River at I-94, Bismarck, Bu...
Significance: The Liberty Memorial Bridge is a three-span, Warren-Turner through truss bridge, a variation of the Warren through truss designed by C.A.P. Turner. This was the first highway bridge over the Miss... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles...
Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the ex... More
Route No. 1-Overton-Lake Mead Road, Culverts and Headwalls, 6 miles so...
Significance: The Route No. 1 Overton-Lake Mead Road contributed significantly to National park Service development of the Lake Mead National Recreation Area beginning in 1938. Stone masonry culvert headwalls a... More
Route No. 1-Overton-Lake Mead Road, Culverts and Headwalls, 6 miles so...
Significance: The Route No. 1 Overton-Lake Mead Road contributed significantly to National park Service development of the Lake Mead National Recreation Area beginning in 1938. Stone masonry culvert headwalls a... More
Route No. 1-Overton-Lake Mead Road, Culverts and Headwalls, 6 miles so...
Significance: The Route No. 1 Overton-Lake Mead Road contributed significantly to National park Service development of the Lake Mead National Recreation Area beginning in 1938. Stone masonry culvert headwalls a... More
Route No. 1-Overton-Lake Mead Road, Culverts and Headwalls, 6 miles so...
Significance: The Route No. 1 Overton-Lake Mead Road contributed significantly to National park Service development of the Lake Mead National Recreation Area beginning in 1938. Stone masonry culvert headwalls a... More
Liberty Memorial Bridge, Spanning Missouri River at I-94, Bismarck, Bu...
Significance: The Liberty Memorial Bridge is a three-span, Warren-Turner through truss bridge, a variation of the Warren through truss designed by C.A.P. Turner. This was the first highway bridge over the Miss... More