Old Mission Dam

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Old Mission Dam
Old Mission Dam in 2008
Old Mission Dam is located in California
Old Mission Dam
Location Mission Trails Regional Park, San Diego, California
Coordinates 32°50′24″N 117°2′32″W / 32.84000°N 117.04222°W / 32.84000; -117.04222Coordinates: 32°50′24″N 117°2′32″W / 32.84000°N 117.04222°W / 32.84000; -117.04222
Area 0.3 acres (0.12 ha)
Built 1803
Governing body Local
NRHP Reference # 66000225[1]
CHISL # 52
SDHL # 2
Significant dates
Added to NRHP October 15, 1966
Designated NHL May 21, 1963[4]
Designated CHISL December 6, 1932[2]
Designated SDHL February 1, 1968[3]

The Old Mission Dam, located in San Diego, California was the first major irrigation project on the Pacific coast of the United States.[4] Located along the San Diego River,[5] the stone and cement dam is 220 ft long (67 m), 13 ft wide (4.0 m) at its base and 12 ft high (3.7 m). Water was released for a sawmill and irrigation at the Mission San Diego de Alcalá, 5 miles (8.0 km) away.[6][7]

Aerial view of the dam from 1000 feet

It is now part of Mission Trails Regional Park, the largest municipal park in California. Old Mission Dam is also both a state and a national registered historic landmark.[4][2]


Mission Dam & Flume, 4/2009
  1. ^ "National Register Information System". National Register of Historic Places. National Park Service. 2008-04-15. 
  2. ^ a b "Mission Dam". Office of Historic Preservation, California State Parks. Retrieved 2012-10-13. 
  3. ^ "Historical Landmarks Designated by the San Diego Historical Resources Board". City of San Diego. 
  4. ^ a b c NHL Summary
  5. ^ "History". San Diego County Water Authority. Retrieved 26 June 2013. 
  6. ^ Snell, Charles; Patricia Heintzelman (1964). "Old Mission Dam" (pdf). National Register of Historic Places - Nomination and Inventory. National Park Service. Retrieved 25 May 2012. 
  7. ^ "Old Mission Dam" (pdf). Photographs. National Park Service. Retrieved 25 May 2012.