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.
Hammer Island is located in Sacramento-San Joaquin River Delta
Hammer Island
Hammer Island
Hammer Island is located in California
Hammer Island
Hammer Island
Hammer Island is located in the United States
Hammer Island
Hammer Island
Geography
LocationNorthern California
Coordinates37°48′59″N 121°33′25″W / 37.81639°N 121.55694°W / 37.81639; -121.55694 (Hammer Island)[1]
Adjacent toSacramento–San Joaquin River Delta
Highest elevation0 ft (0 m)[1]
Administration
United States
State California
CountyContra Costa

Hammer Island is a small island in the Sacramento–San Joaquin River Delta, in Contra Costa County, California,[2][3][4][5] originally named Santos Island, it was changed to Hammer Island after Hans Hammer purchased the island from Mr. Santos in 1939.[6] Its coordinates are 37°48′59″N 121°33′25″W / 37.81639°N 121.55694°W / 37.81639; -121.55694 (Hammer Island)[1],; the United States Geological Survey measured its elevation as 0 ft (0 m) in 1981,[1] and it appears on a 1978 USGS map.[7]

References

  1. ^ a b c d U.S. Geological Survey Geographic Names Information System: Hammer Island
  2. ^ "1877 County Boundary Error Will Be Corrected". Oakland Tribune. Oakland, California. 1955-05-08. p. 26.
  3. ^ "Page 73". The Argus. Fremont, California. 1976-06-27. p. 73.
  4. ^ "Strange Crop: Water Lilies Cause San Joaquin River Delta Problems". The Sacramento Bee. Sacramento, California. 1977-12-21. p. 10.
  5. ^ "Species". Napa Valley Register. Napa, California. 2020-04-17. p. B3.
  6. ^ "Funeral Today For Hans Hammer, Island Resident". Tracy Press. Tracy, California. 1960-05-23. p. 1.
  7. ^ United States Geological Survey (2015). "Clifton Court Forebay Quadrangle, California" (Map). United States Department of the Interior Geological Survey. 1:24000.


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