Arroyo Hondo (Santa Clara County)

History

Arroyo Hondo means "deep creek" in Spanish. Its Isabel Creek tributary is significant in that the Spanish name for Mt. Hamilton was the Sierra de Santa Isabel, and the highest point was then referred to as Mount Isabel instead of Mount Hamilton. When William Henry Brewer and Charles Hoffman of the Whitney Survey climbed the peak on August 26, 1861, they did not know it had a name, and christened it Mt. Hamilton, although they did correctly place Isabel Valley on their map to the east. When in 1895, the USGS realized that the peak 2 mi southeast of Mt. Hamilton was as tall (4193 ft), they correctly named it Mt. Isabel.

Watershed

The Arroyo Hondo mainstem is formed by the confluence of Isabel Creek and Smith Creek at the northern tip of Joseph D. Grant County Park at an elevation of 1585 ft above sea level. It flows northerly to its confluence with Calaveras Reservoir at an elevation of 765 ft. Isabel Creek begins at about 2600 ft, about 1 mi south of Mt. Helen, then flows north through the Isabel Valley, then east and north of Mt. Isabel and Mt. Hamilton until it is joined by Smith Creek. Arroyo Hondo joins Calaveras Creek in Calaveras Reservoir. Calaveras Creek is, in turn, tributary to Alameda Creek in Alameda County and ultimately flows into San Francisco Bay.

Ecology

Arroyo Hondo still has remnants of native coastal rainbow trout (Oncorhynchus mykiss irideus), which several conservation organizations have attempted to protect. Impassable falls are now present on upper Arroyo Hondo, but the rainbow trout in its Smith and Isabel creek tributaries are assumed to be native, as California roach (Hesperoleucus symmetricus) and Sacramento sucker (Catostomus occidentalis occidentalis) are also present above and below the falls. The California Academy of Sciences collected a steelhead trout specimen in 1898 on Isabel Creek. Also, both Smith Creek and Arroyo Hondo were recorded in 1905 by John Otterbein Snyder as anadromous steelhead trout (Oncorhynchus mykiss irideus) streams. Speckled dace (Rhinichthys osculus) were collected by John Otterbein Snyder in 1898 in Arroyo Hondo and Isabel creeks, but not by Scoppettone and Smith in 1978, or by Leidy and Bronwen in 2013, and their status in the creek remains uncertain as is true of most of their former sites in the central coast.

Foothill yellow-legged frogs (Rana boylei) and California red-legged frogs (Rana draytoni) are present in Upper Alameda, Arroyo Hondo, Smith, and Isabel creeks.

References

References

1. {{gnis. 233435. Arroyo Hondo
2. U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. [http://viewer.nationalmap.gov/viewer/ The National Map] {{webarchive. link. (2012-03-29 , accessed March 15, 2011)
3. {{gnis. 254824
4. Erwin G. Gudde. (2004). "California Place Names: The Origin and Etymology of Current Geographical Names". University of California Press.
5. {{gnis. 254822. Isabel Creek
6. Jerry J. Smith. (July 25, 2013). "Northern Santa Clara County Fish Resources". San Jose State University.
7. Jerry J. Smith. (1998). "Steelhead and Other Fish Resources of Western Mt. Hamilton Streams". San Jose State University.
8. "Oncorhynchus mykiss gairdnerii". California Academy of Sciences Ichthyology Collection.
9. John Otterbein Snyder, United States Bureau of Fisheries. (1905). "Notes on the fishes of the streams flowing into San Francisco Bay, California in Report of the Commissioner of Fisheries to the Secretary of Commerce and Labor for the fiscal year ending June 30, 1904". General Printing Office.
10. (2005). "Historical Distribution and Current Status of Steelhead/Rainbow Trout (Oncorhynchus mykiss) in Streams of the San Francisco Estuary, California". Center for Ecosystem Management and Restoration.
11. Jerry J. Smith. (1998). "Steelhead and Other Fish Resources of Western Mt. Hamilton Streams". San Jose State University.
12. (2013). "Alameda Creek Watershed Historical Ecology Study (Table 8.4)". San Francisco Estuary Institute (SFEI).