Telegraph Hill Quarry
Unfinished History
The Gray Brothers operated a quarry at Sansome and Green Streets during the 1890s and well into the early part of the 20th century. In spite of strong opposition from Telegraph Hill neighbors and local residents, including the passage of city ordinances banning the further quarrying of Telegraph Hill, the Gray Bros. continued past 1909, leaving the hill scarred and subject to winter landslides.
The Gray Brothers quarry left permanent scars on Telegraph Hill. In 1924 landslides still plagued the hill regularly.
Today, the Gray Brothers Quarry sites are often full of invading plant species.