The Holland Tract is an island in the Sacramento–San Joaquin River Delta.[2][3] It is part of Contra Costa County, California, and managed by Reclamation District 2025.[4][5] [6] [7] [8] [9] Its coordinates are 37°59′55″N 121°36′08″W / 37.99861°N 121.60222°W / 37.99861; -121.60222 (Holland Tract)[1], and the United States Geological Survey measured its elevation as 7 ft (2.1 m) in 1981.[1] It appears on a 1952 United States Geological Survey map of the area.[10]

Holland Tract
A flock of sheep roam on an island.
Sheep roaming the Holland Tract in 2021.
Holland Tract is located in Sacramento-San Joaquin River Delta
Holland Tract
Holland Tract
Holland Tract is located in California
Holland Tract
Holland Tract
Holland Tract is located in the United States
Holland Tract
Holland Tract
Geography
LocationNorthern California
Coordinates37°59′55″N 121°36′08″W / 37.99861°N 121.60222°W / 37.99861; -121.60222 (Holland Tract)[1]
Adjacent toSacramento–San Joaquin River Delta
Highest elevation7 ft (2.1 m)[1]
Administration
United States
State California
CountyContra Costa
USGS aerial imagery of Holland Tract

References

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  1. ^ a b c d U.S. Geological Survey Geographic Names Information System: Holland Tract
  2. ^ California State Automobile Association (2007). Coast and Valley: Bay Area to Southern California (Map). 1:560,000. American Automobile Association.
  3. ^ California State Automobile Association (1999). San Francisco Bay Region (Map). 1:190,000. American Automobile Association.
  4. ^ "Countywide Reclamation Services: Municipal Service Review/Sphere of Influence Update (2nd Round) – FINAL" (PDF). Contra Costa Local Agency Formation Commission. 18 November 2015. Archived (PDF) from the original on 1 March 2017. Retrieved 25 February 2021.
  5. ^ "Bond Men Visit Phillips Company's Island Holdings". The Evening Mail. Stockton, California. 1913-01-11. p. 6. Retrieved 2021-11-18 – via Newspapers.com.
  6. ^ "King Bean In The Ascendency". Stockton Daily Evening Record. Stockton, California. 1913-02-25. p. 7. Retrieved 2021-11-18 – via Newspapers.com.
  7. ^ "More islands submerged in Delta floods". The Berkeley Gazette. Berkeley, California. 1980-02-22. p. 1. Retrieved 2021-11-18 – via Newspapers.com.
  8. ^ "Milder Storm Due For North State; Beleaguered Delta Area Eyes Relief". The Sacramento Bee. Sacramento, California. 1980-02-23. p. 3. Retrieved 2021-11-18 – via Newspapers.com.
  9. ^ "New flood threatens East Bay water lines". The Berkeley Gazette. Berkeley, California. 1980-10-23. p. 5. Retrieved 2021-11-18 – via Newspapers.com.
  10. ^ United States Geological Survey (1952). "Woodward Island Quadrangle, California" (Map). United States Department of the Interior Geological Survey. 1:24000.

Most of the island is owned by the Metropolitan Water District of Southern California.[1]