Hammer Island

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[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]

Hammer Island
USGS aerial imagery of Hammer Island; Mendota Canal is to the west, and Old River is to the east.
Hammer Island
Hammer Island
Hammer Island
Geography
LocationNorthern California
Coordinates37°48′59″N 121°33′25″W[1]
Adjacent bodies of waterSacramento–San Joaquin River Delta
Highest elevation0 ft (0 m)[1]
Administration
United States
State California
CountyContra Costa

References
  1. 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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