New Waddell Dam


New Waddell Dam, constructed between 1985 and 1994, stores Colorado River water for the Central Arizona Project, and also stores Agua Fria River runoff and provides flood protection by controlling river flows. The dam is on the Agua Fria River about 35 miles above the Gila River confluence and is located one-half mile downstream of the now submerged historic Waddell Dam, which was built by the Maricopa Water District (MWD). The dam's reservoir, Lake Pleasant, also stores water for MWD irrigation. The dam has a crest elevation of 1,728 feet and a crest length of 4,900 feet.

RegionFacilities in Lower Colorado | Lower Colorado Home Page
ProjectCentral Arizona
Dam TypeZoned earthfill
ReservoirLake Pleasant
WatercourseAgua Fria
Location 35 miles northwest of Phoenix, Arizona
Original Construction1987-1994
Modified Construction
National ID NumberAZ82929
Hydrologic Unit Code

Structural Height 440 ft
Hydraulic Height (Normal Operating Depth at Dam)300 ft
Top Parapet (Elevation)
Spillway Crest Elevation1706.5 ft (left); 1711 ft (right)
Crest Elevation1728 ft
Crest Length4,900 ft
Crest Width 35 ft
Base Width 1514 ft
Volume of Dam Construction Materials 16,000,000 cu yds
Streambed at Dam Axis 1430
Top of Exclusive Flood Control Pool (Elevation)
Top of Joint Use Pool (Elevation)
Top of Active Conservation Pool (Elevation)1702 ft
Top of Inactive Conservation Pool (Elevation)1552 ft
Top of Dead Storage Pool (Elevation)1506 ft

Hydraulics & Hydrology
Total Water Storage at Elevation 1,108,592 af at 1725 ft
Maximum Water Surface Elevation1725 ft
Normal Water Surface Elevation1702 ft
Spillway Type Ungated freeflow (left); fuseplug embankment (right)
Spillway Capacity at Elevation187,000 cfs at 1706.5 ft
Auxiliary Spillway Yes
Auxiliary Spillway Capacity at Elevation129,000 cfs at 1725 ft
Uncontrolled Spillway Capacity at Elevation 2,187,000 cfs at 1728 ft
Outlet Works Capacity at Elevation 3,000 cfs (Central Arizona Project) 5,600 cfs (Maricopa Water District)
Diversion Capacity at Elevation 4,320 cfs
Drainage Area1459.0 sq mi
Hydrometeorological Report (HMR)HMR 49
Probable Maximum Flood (PMF) Report

Contact Information
TitleArea Office Manager
OrganizationPhoenix Area Office
Address6150 West Thunderbird Road
CityGlendale, AZ 85306-6200
Phone (Fax)623 773-6480
Phone (Office)623 773-6200
TitleCommunity Relations
OrganizationCentral Arizona Project
AddressPO Box 43020
CityPhoenix, AZ 85080-3020
Phone (Fax)623 869-2678
Phone (Office)623 869-2333

Last updated: Jun 29, 2009