Hospital Creek

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Hospital Creek (Arroyo de Ospital,[1])
or Arroyo del Osnital [2]
Name origin: Spanish
Country United States
State California
Region Stanislaus County, San Joaquin County
Part of San Joaquin River
 - location 2.25 miles southeast of Mount Oso, Stanislaus County
 - coordinates 37°28′41″N 121°21′11″W / 37.47806°N 121.35306°W / 37.47806; -121.35306 [3]
Mouth mouth
 - location a former slough of the San Joaquin River, Stanislaus County
 - elevation 33 ft (10 m) [3]
 - coordinates 37°37′07″N 121°12′06″W / 37.61861°N 121.20167°W / 37.61861; -121.20167Coordinates: 37°37′07″N 121°12′06″W / 37.61861°N 121.20167°W / 37.61861; -121.20167 [3]
Length 18 mi (29 km)

Hospital Creek, originally Arroyo de Ospital,[1] or Arroyo del Osnital [2] is a tributary of the San Joaquin River draining eastern slopes of a part of the Diablo Range within San Joaquin County.

The creek is approximately 18 miles (29 km) long,[4]


It has its source on the southeast flank of Mount Oso, in Stanislaus County. From there it flows northwest then north through Hospital Creek Canyon around Mount Oso into San Joaquin County. It then turns east to dip back briefly over the border into Stanislaus County before turning back north into San Joaquin County flowing tnen northeast to emerge from the Diablo Range foothills.

From the canyon mouth it flows east into the Central Valley of California, United States.[5] Though its downstream end is uncertain as it disappears into a former slough of the San Joaquin River in the San Joaquin Valley in Stanislaus County.


Originally called Arroyo de Ospital in the Diseño del Rancho Pescadero, this creek was a watering place on the El Camino Viejo. A map of routes to the southern gold mines in 1851 showed this creek as Arroyo del Osnital. Neither Ospital or Osnital is a Spanish word, so presumably it was a Native American word, probably Yokutsan. By 1857 Britton & Rey's Map Of The State Of California referred to the creek as Arroyo de Osnita.[6] However by 1873, its name was changed to what it closely sounds like in English and was referred to as Hospital Creek on an official state of California Map.[7]


East of the San Joaquin Fault in the vicinity of Hospital Creek there is a flow pattern of alluvium that has been reported as a mud flow.[8] This flow pattern was deposited in the early Holocene or the late Pleistocene.[9]

See also[edit]


  1. ^ a b Diseño del Rancho Pescadero
  2. ^ a b Map of the southern mines: (Calif.) 1852 by Charles Drayton Gibbes, The Bancroft Library, University of California, Berkeley, CA 94720-6000
  3. ^ a b c U.S. Geological Survey Geographic Names Information System: Hospital Creek
  4. ^ U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National Map Archived 2012-04-05 at WebCite, accessed March 11, 2011
  5. ^ San Joaquin River basin tributaries
  6. ^ Britton & Rey's Map Of The State Of California. Compiled from the U.S. Land & Coast Surveys, the several Military, Scientific & Rail Road Explorations, the State & County Boundary Surveys made under the Order of the Surveyor General of California, & from Private Surveys. By George H. Goddard, C.E. Completed with Additions & Corrections up to the day of publication from the U.S. Land Office & other reliable sources. Lithy. Of Britton & Rey, Montgomery St. Cor. Commercial, S.F. Entered ... 1857 by Britton & Rey ... California. Engraved by H. Steinegger.
  7. ^ Map Of The San Joaquin, Sacramento And Tulare Valleys, State Of California, prepared under the direction of the Board Of Commissioners On Irrigation appointed under the Act of Congress approved March 3rd 1873, showing the country that may be irrigated and a Provisional System Of Irrigation Compiled from the Maps of the Geological Survey Of California and from Special Surveys and Examinations. 1873. Published by authority of the Hon. Secretary of War in the Office of the Chief of Engineers U.S. Army.
  8. ^ C.Michael Hogan, Marc Papineau, Ballard George, et al., Environmental Assessment for the Proposed Residential and Commercial Development at the Westley Interchange, Earth Metrics Inc., Report 10529C, California State Environmental Clearinghouse, Sacramento, Ca., July, 1990
  9. ^ Bartow, Geologic map of the east flank of the diablo range from Hospital Creek to Poverty Flats (1985)