Roza Diversion Dam

Overview

Roza Diversion Dam, located 10 miles north of Yakima, diverts water from the Yakima River. The dam is a concrete weir, movable crest structure, 486 feet long at the crest, 67 feet high, and contains 21,700 cubic yards of concrete. In 2010, Reclamation modified the 110-foot long west roller gate to reduce the amount of water leakage under the gate, and to provide improved downstream passage for juvenile salmonids of all species, as well as adult steelhead kelts.


General
RegionFacilities in Pacific Northwest | Pacific Northwest Home Page
StateWashington
CountyKittitas
ProjectYakima
Dam Type
Reservoir
WatercourseYakima River
Location
Longitude-120.4658
Latitude46.74923
Original Construction1939
Modified Construction
National ID NumberWA00275
Hydrologic Unit Code

Dimensions
Structural Height67 ft
Hydraulic Height (Normal Operating Depth at Dam)34 ft
Top Parapet (Elevation)
Spillway Crest Elevation
Crest Elevation1205.0 ft
Crest Length486 ft
Crest Width
Base Width
Volume of Dam Construction Materials
Streambed at Dam Axis
Top of Exclusive Flood Control Pool (Elevation)
Top of Joint Use Pool (Elevation)
Top of Active Conservation Pool (Elevation)
Top of Inactive Conservation Pool (Elevation)
Top of Dead Storage Pool (Elevation)

Hydraulics & Hydrology
Volume
Total Water Storage at Elevation
Maximum Water Surface Elevation
Normal Water Surface Elevation
Spillway Type
Auxiliary Spillway
Spillway Capacity at Elevation
Auxiliary Spillway Capacity at Elevation
Uncontrolled Spillway Capacity at Elevation
Outlet Works Capacity at Elevation
Diversion Capacity at Elevation
Drainage Area
Hydrometeorological Report (HMR)
Probable Maximum Flood (PMF) Report

Contact Information
Owner
TitleArea Office Manager
OrganizationColumbia-Cascades Area Office
Address1917 Marsh Road
CityYakima, WA 98901-2058
Phone (Fax)509 454-5611
Phone (Office)509 575-5848 x202
Operator
TitleArea Office Manager
OrganizationColumbia-Cascades Area Office
Address1917 Marsh Road
CityYakima, WA 98901-2058
Phone (Fax)509 454-5611
Phone (Office)509 575-5848 x202


Last updated: Jul 09, 2012