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Hammer Island facts for kids

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Hammer Island
Aerial image of an island.
USGS aerial imagery of Hammer Island; Mendota Canal is to the west, and Old River is to the east.
Geography
Location Northern California
Adjacent bodies of water Sacramento–San Joaquin River Delta
Highest elevation 0 ft (0 m)
Administration
United States
State  California
County Contra Costa

Hammer Island is a small island in the Sacramento–San Joaquin River Delta. It is part of Contra Costa County, California. Its coordinates are 37°48′59″N 121°33′25″W / 37.81639°N 121.55694°W / 37.81639; -121.55694 (Hammer Island), and the United States Geological Survey measured its elevation as 0 ft (0 m) in 1981.

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