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Twitchell Dam

Picture of Twitchel Dam, California


Statistics

General

  • Region (Map) : ................... Mid-Pacific
  • State (Map) ........................ California
  • County ................................ San Luis Obispo
  • Project: ................................ Santa Maria
  • Dam type: ........................... Earthfill
  • Location: ............................ 150 mi NW of LA
  • Watercourse: ..................... Cuyama River
  • Reservoir: ........................... Twitchell
  • Construction Date: ........... 1956-1958
  • National ID Number ......... CA10197
  • Hydrologic Unit Code .....

Dimensions


Hydraulics

  • Normal Water Surface Elev:       ........... 623.0 ft
  • Hydraulic Height: .................................. 210.5 ft
  • Service Spillway Type:
  •    Uncontrolled  Crest    ................................Yes
  •    Morning-Glory ........................................... No
  •    Crest Length    ........................................... NA
  •    Gated      ....................................................... No
  •    Capacity at Elev:   686.5 ft,              26,350 cfs
  • Auxiliary Spillway ......................................... No
  •     Capacity at Elev.   .................................. 0  cfs
  • Outlet Works Capacity at
  •     Elevation  651.5 ft,  ........................ 12,700 cfs

Hydrology

  • Drainage Area: ...............................1135.0 sq mi
  • Hydrometeorological Report               HMR 36
  • Flood Type: ...........................Oct-May General
  • Storm Duration: ....................................... 72 hrs
  • Probable Maximum Flood (PMF) Report:
  •   Peak Inflow: ................................... 229,350 cfs
  •   Inflow Volume: ........................ 765,250 acre-ft
  •   Flow Duration: ..................................12.3 days
  •   PMF Routing MWS Elev.: ....................... NA
  •   Initial Routing Elev: ............................ 623.0 ft
  •   Study Date: ................................ January 1990


Power Generation


Narration

 


Geology 

 


Links

 | Recreation |

 | Dams Located by State | USBR California Dams | Mid-Pacific Region Dams |

 | Owner:  Bureau of Reclamation, South-Central California Area Office,
                   1243 N Street, Fresno, CA  97321-1813, (559) 487-5116

 | Operator:  Santa Maria Valley Water Conservation District,
                       PO Box 364, Santa Maria, CA  93456, (805) 925-5212

 

 

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