Alvord Lake Bridge, Road bridge at Golden Gate Park entrance, San Francisco, US.
The Alvord Lake Bridge features a single concrete arch spanning 64 feet wide with artificial stalactites decorating its underside passage.
Ernest L. Ransome constructed this bridge in 1889 using his patented cold-twisted square steel bars, making it the first reinforced concrete bridge in America.
The bridge serves as a connection point between the Haight-Ashbury neighborhood and Golden Gate Park, facilitating access for pedestrians beneath vehicle traffic.
The structure carries three lanes of Kezar Drive traffic while providing a grade-separated crossing underneath for park visitors entering from Stanyan Street.
The exterior concrete surface incorporates scoring and hammering techniques to create a sandstone appearance, while the interior resembles a cave structure.
Location: San Francisco
Official opening: 1889
GPS coordinates: 37.76900,-122.45500
Latest update: September 23, 2025 16:45
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