Home | About Us | News | Programs & Activities | Library | Water Operations | Site Index
 

Tieton Dam
Tieton Dam, Washington - Yakima Project (Click to Enlarge)

Statistics

General

  • Region (Map) : .................. Pacific Northwest
  • State (Map) ........................ Washington
  • County ................................ Yakima
  • Project: ................................ Yakima
  • Dam type: ........................... Earthfill
  • Location: ............................ 40 mi NW of Yakima
  • Watercourse: ..................... Tieton River
  • Reservoir: ........................... Rimrock Lake
  • Construction Date: ............1917-1925
  • National ID Number .......... WA00273
  • Hydrologic Unit Code .....

Dimensions

Hydraulics

  • Normal Water Surface Elev: ............... 2926.0 ft
  • Hydraulic Height: .................................. 198.0 ft
  • Service Spillway Type:
  •    Uncontrolled  Crest    .................................No
  •    Morning-Glory ........................................... No
  •    Crest Length    ........................................... NA
  •    Gated      ..................................................... Yes
  •    Capacity at Elev: 2928.2 ft,              45,700 cfs
  • Auxiliary Spillway ......................................... No
  •     Capacity at Elev.   .................................. 0 cfs
  • Outlet Works Capacity at
  •     Elevation  2926.0 ft.,  ...................... 3,000 cfs

Hydrology

  • Drainage Area: ................................ 187.0 sq mi
  • Hydrometeorological Report               HMR 57
  • Flood Type: .......................... Nov-Feb General
  • Storm Duration: ....................................... 72 hrs
  • Probable Maximum Flood (PMF) Report:
  •   Peak Inflow: ................................... 159,600 cfs
  •   Inflow Volume: ........................ 285,700 acre-ft
  •   Flow Duration: ....................................7.5 days
  •   PMF Routing MWS Elev.: ........................ NA
  •   Initial Routing Elev: ........................... 2926.0 ft
  •   Study Date: ................................. August 1994

Note:  To equate elevations with sea-level data, subtract 24.6 feet from all elevations shown

Power Generation

Narration

 

Geology

The geologic structure of the basin has a base of shale and sandstone sediments which were subsequently overlain by the basalt flows of the Columbia River lava. As the Cascade Mountains uplifted, stream erosion cut deep canyons through the basalt and underlying rock. Subsequent to the uplift, lava flows completely covered the upper ends of the stream valleys and partly filled sections of the stream with andesite. The andesite in the canyons was later eroded away leaving the upper end of the valley still deeply buried. Glacial material and soil covers much of the valley floors and occassional terraces line the valley side.

Miscellaneous Links

 | Current Reservoir Storage, plus other storage Units within the Yakima River Basin |

Links

 | Recreation |

 | Dams Located by State | USBR Washington Dams | Pacific Northwest Region Dams |

 | Owner:  Bureau of Reclamation, Upper Columbia Area Office,
                   PO Box 1749, Yakima, WA  98907-1749, (509) 575-5848 ext 202

 | Operator:  Bureau of Reclamation, Upper Columbia Area Office,
                       PO Box 1749, Yakima, WA  98907-1749, (509) 575-5848 ext 202
 

Dams | Projects | Powerplants | Contact Us | Maps | Glossary | FAQ´s | Links