Bonds for the dam's construction were issued in 1924. Construction began in March 1932 and was completed in April 1934, at a total cost of US$3,127,762.[3]
The rock-fill dam, built by the Los Angeles County Flood Control District, is 585 feet (178 m) long, 266 feet (81 m) tall (measured from the stream bed), 18 feet (5.5 m) wide at the top, and contains 1,044,945 cubic yards (798,918 m3) of material. Its crest is 2,412 feet (735 m) above sea level and 27 feet (8.2 m) above the certified water storage elevation.[2]
The dam rests on crystalline granite bedrock. The buttress is 750 feet (230 m) thick at the base, and the height from foundation to crest is 285 feet (87 m). There are concrete cutoff walls and a concrete facing slab on the dam's upstream side.[3]
cogswell, this, article, needs, additional, citations, verification, please, help, improve, this, article, adding, citations, reliable, sources, unsourced, material, challenged, removed, find, sources, news, newspapers, books, scholar, jstor, april, 2015, lear. This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources Cogswell Dam news newspapers books scholar JSTOR April 2015 Learn how and when to remove this template message Cogswell Dam is a rockfill dam on the West Fork of the San Gabriel River in Los Angeles County California It is located in the San Gabriel Mountains northeast of Mount Wilson and within the Angeles National Forest Cogswell DamSatellite viewLocation of Cogswell Dam in CaliforniaCountryUnited StatesLocationSan Gabriel Mountains Angeles National Forest Los Angeles County CaliforniaCoordinates34 14 41 N 117 57 55 W 34 24472 N 117 96528 W 34 24472 117 96528Opening date1935 89 years ago 1935 Owner s Los Angeles County Department of Public WorksDam and spillwaysType of damRock filledImpoundsWest Fork San Gabriel RiverHeight266 ft 81 m Height foundation 280 ft 85 m 1 Length585 ft 178 m Spillway capacity59 900 cu ft s 1 700 m3 s 1 ReservoirCreatesCogswell ReservoirTotal capacity12 234 acre ft 15 090 000 m3 Catchment area38 4 sq mi 99 km2 Surface area146 acres 59 ha It forms Cogswell Reservoir which has a capacity of 8 969 acre feet 11 063 000 m3 2 The dam serves mainly for flood control in conjunction with San Gabriel Dam and Morris Dam downstream San Gabriel Dam lies 13 miles 21 km downstream 3 Construction editBonds for the dam s construction were issued in 1924 Construction began in March 1932 and was completed in April 1934 at a total cost of US 3 127 762 3 The rock fill dam built by the Los Angeles County Flood Control District is 585 feet 178 m long 266 feet 81 m tall measured from the stream bed 18 feet 5 5 m wide at the top and contains 1 044 945 cubic yards 798 918 m3 of material Its crest is 2 412 feet 735 m above sea level and 27 feet 8 2 m above the certified water storage elevation 2 The dam rests on crystalline granite bedrock The buttress is 750 feet 230 m thick at the base and the height from foundation to crest is 285 feet 87 m There are concrete cutoff walls and a concrete facing slab on the dam s upstream side 3 See also editList of dams and reservoirs in California San Gabriel Mountains topics San Gabriel River topicsReferences edit a b 1 dead link a b Dams Within the Jurisdiction of the State of California A G PDF California Department of Water Resources Archived from the original PDF on 2012 03 09 Retrieved September 30 2012 a b c Cogswell Dam PDF Dpwftp cp la ca us Retrieved November 18 2012 permanent dead link This article about a building or structure in Los Angeles is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Cogswell Dam amp oldid 1216572705, wikipedia, wiki, book, books, library,
