Pilot Knob (Imperial County, California)

For other uses, see Pilot Knob.
Pilot Knob (Imperial County, California)
(Pilot Knob (Yuma, Arizona))
Volcanic plug
Cargo Muchacho Mountains on left
Yuma-Winterhaven agricultural valley
Pilot Knob about 7mi south of Cargo Muchacho's
(adjacent to the All American Canal)
Country United States
State California
Region Colorado Desert
((northwestern)-Sonoran Desert)
Municipality (west of)-Winterhaven, CA—Yuma, AZ
Borders on Cargo Muchacho Mountains-N
Algodones Dunes-W
River Colorado River-(SE perimeter)
Coordinates
Highest point Pilot Knob
 - elevation 876 ft (267 m)
Length 1.5 mi (2 km)
Width 1.5 mi (2 km)
Pilot Knob
Elevation 876 ft (267 m) NAVD 88[1]
Location
Location Imperial County, California. USA
Topo map USGS Yuma West

Pilot Knob (also, Avie Quah-la-Altwa, Ha-bee-co-la-la, and San Pablo) is a peak in Imperial County, California.[2] Pilot Knob is located 8 miles (13 km) southeast of Ogilby,[3] It rises to an elevation of 876 feet (267 m).[1] Pilot Knob is a rocky landform, geologically a Volcanic plug, west of Yuma, Arizona–Winterhaven, California; it is connected to the Cargo Muchacho Mountains, the central portion of the mountains being about 7 miles (11 km) north. Pilot Knob was named for its prominence as a landmark for riverboat traffic in the 19th-20th centuries on the Colorado River which borders Winterhaven–Yuma.

Contents

Pilot Knob description

Separated from the center of the Cargo Muchacho Mountains by 7 mi, the volcanic landform is at the base of alluvial fans. Pilot Knob has a height of 897 feet (273 m), and the entire mountain block is about 2 x 2 mi. The mountain has a rock quarry on its north side, visible from Interstate 8.

Access to Pilot Knob

Pilot Knob is accessed from Interstate 8, the landform being east of the Algodones Dunes and east of El Centro, California in southeastern Imperial County. The All American Canal is cut from the south border of Pilot Knob, and can be seen in aerial views traversing the Algodones Dunes to the west.

History

When Juan Bautista de Anza sighted the peak in 1774 he named it Cerro de San Pablo.[3] The Saint Thomas Yuma Indian Mission was located 8 miles (13 km) to the east.[3]

The Alamo Canal intake was placed at Pilot Knob due to the availability of a solid rock foundation for the head gate.[4]

KIVA (TV) Yuma, Arizona transmitted from Pilot Knob from 1953 to 1970.

References

  1. ^ a b "West Pilot". NGS data sheet. U.S. National Geodetic Survey. http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=DB1366. Retrieved 2009-08-16. 
  2. ^ "Pilot Knob". Geographic Names Information System, U.S. Geological Survey. http://geonames.usgs.gov/pls/gnispublic/f?p=gnispq:3:::NO::P3_FID:247467. Retrieved 2009-08-16. 
  3. ^ a b c Durham, David L. (1998). California's Geographic Names: A Gazetteer of Historic and Modern Names of the State. Quill Driver Books. p. 1455. ISBN 9781884995149. 
  4. ^ Clarence Everett Tait (1908). Irrigation in Imperial Valley, California: its problems and possibilities. Washington Government Printing Office. p. 51. ISBN 978-1113101785. http://books.google.com/books?id=ngMOAAAAYAAJ&dq=pilot%20knob%20imperial%20canal%20intake&pg=PA51#v=onepage&q=pilot%20knob%20imperial%20canal%20intake&f=false. Retrieved 26 August 2010.