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- Q14683143 subject Q8360226.
- Q14683143 subject Q8360442.
- Q14683143 subject Q8499097.
- Q14683143 subject Q9531207.
- Q14683143 abstract "Little Rock Dam also known as Littlerock Dam, or officially as Little Rock-Palmdale Dam is a concrete gravity dam on Little Rock Creek in Los Angeles County, California, located about 5 mi (8.0 km) south of Palmdale. The dam and Little Rock Reservoir are owned by the Palmdale Water District and Littlerock Creek Irrigation District, and are used for agricultural and municipal water supply and flood control.The dam is 124 ft (38 m) high from foundation to crest and spans 576 ft (176 m) across the canyon, forming a reservoir with a capacity of 3,700 acre·ft (4,600,000 m3). The reservoir has a surface area of 108 acres (44 ha) and receives water from a drainage area of 63.7 sq mi (165 km2) on the north slope of the San Gabriel Mountains. A popular recreation spot, the dam, reservoir and vicinity receive about 300,000 visitors each year.Designed by John S. Eastwood, a noted engineer of several dams in the western U.S., Littlerock was originally built in 1924 by the Palmdale Irrigation District (now Palmdale Water District) to provide a water supply for orchards in the area. With a height of 112 ft (34 m) and holding 2,400 acre·ft (3,000,000 m3) of water, it was the tallest multiple-arch reinforced concrete dam in the world at the time. The dam's design combined with its record height was highly controversial; the state mandated renovations in 1932, in which concrete buttresses were added to the dam face. In 1938, the dam nearly failed as a result of historic flooding, which led to the evacuation of hundreds of people in downstream towns. The dam was renovated again in 1966 to comply with increasing safety standards and regional urban development. In the 1970s, it was listed on the National Register of Historic Places (NRHP).In 1994, the last major renovation of the dam was completed, which involved strengthening the face with roller-compacted concrete, hiding the original multiple arch design forever and transforming it to resemble a conventional gravity dam. The arches are still visible on the back face of the dam when the water level in the reservoir is low. The design changes resulted in the dam being taken off the NRHP. The dam was also raised 12 ft (3.7 m) and a new spillway added, increasing the reservoir capacity to its current 3,700 acre·ft (4,600,000 m3).".
- Q14683143 description "Concrete gravity".
- Q14683143 height "37.7952".
- Q14683143 length "175.5648".
- Q14683143 location Q30.
- Q14683143 location Q99.
- Q14683143 openingYear "1924".
- Q14683143 river Q20714699.
- Q14683143 wikiPageExternalLink www.littlerockdam.org.
- Q14683143 wikiPageWikiLink Q104994.
- Q14683143 wikiPageWikiLink Q1419854.
- Q14683143 wikiPageWikiLink Q20714699.
- Q14683143 wikiPageWikiLink Q2547687.
- Q14683143 wikiPageWikiLink Q30.
- Q14683143 wikiPageWikiLink Q3719.
- Q14683143 wikiPageWikiLink Q488940.
- Q14683143 wikiPageWikiLink Q6256242.
- Q14683143 wikiPageWikiLink Q6615479.
- Q14683143 wikiPageWikiLink Q6682397.
- Q14683143 wikiPageWikiLink Q8360226.
- Q14683143 wikiPageWikiLink Q8360442.
- Q14683143 wikiPageWikiLink Q8499097.
- Q14683143 wikiPageWikiLink Q911379.
- Q14683143 wikiPageWikiLink Q9531207.
- Q14683143 wikiPageWikiLink Q99.
- Q14683143 damCrosses "Little Rock Creek".
- Q14683143 damType "Concrete gravity".
- Q14683143 location Q30.
- Q14683143 location Q99.
- Q14683143 name "Little Rock Dam or Littlerock Dam".
- Q14683143 nameOfficial "Little Rock-Palmdale Dam".
- Q14683143 opening "1924".
- Q14683143 resName "Little Rock Reservoir".
- Q14683143 point "34.48583333333333 -118.02194444444444".
- Q14683143 type Place.
- Q14683143 type ArchitecturalStructure.
- Q14683143 type Dam.
- Q14683143 type Infrastructure.
- Q14683143 type Location.
- Q14683143 type Place.
- Q14683143 type Thing.
- Q14683143 type SpatialThing.
- Q14683143 type Q12323.
- Q14683143 comment "Little Rock Dam also known as Littlerock Dam, or officially as Little Rock-Palmdale Dam is a concrete gravity dam on Little Rock Creek in Los Angeles County, California, located about 5 mi (8.0 km) south of Palmdale.".
- Q14683143 label "Little Rock Dam".
- Q14683143 lat "34.48583333333333".
- Q14683143 long "-118.02194444444444".
- Q14683143 name "Little Rock Dam or Littlerock Dam".
- Q14683143 name "Little Rock-Palmdale Dam".