Alamo Dam is located in west-central Arizona. The dam is on the Bill Williams River approximately 39 miles upstream from the river's confluence with the Colorado River at Lake Havasu. Alamo Dam and Lake is a multiple-purpose facility providing the following benefits: flood control, water supply and conservation, recreation, and fish and wildlife enhancement.
Alamo Dam was authorized by the Flood Control Act of 1937 (Public Law 75-406, 28 August 1937, as amended). The initial proposal for the project was contained in House Document No. 625, 78th congress, 2nd Session, dated April 11, 1944.
The current approved water control manual (WCM) for Alamo Dam and Lake is dated April 1973. The WCM is scheduled for revision in 2001.
(More to Come)
| Embankment | ||
| Type | Earth-fill | |
| Crest Elevation | 1,265 feet NGVD | XXX meters NGVD |
| Streambed elevation | 982 feet NGVD | XXX meters NGVD |
| Maximum height above streambed | 283 feet | XXX meters |
| Crest Length | 975 feet | XXX meters |
| Freeboard | 5.4 feet | XXX meters |
| Spillway | ||
| Type | Detached, broad-crested | |
| Crest Elevation | 1235 feet NGVD | XXX meters NGVD |
| Crest Length | 284 feet | XXX meters |
| Outlets | ||
| Vertical Lift Gates | 3-5 feet (W) x 8 feet (H) | 2-xxx meters |
| Low-flow Butterfly Valve | 18-inches | |
| Conduit Length | 1290 feet | XXX meters |
| Entrance Invert Elevation | 990 feet NGVD | |
| Reservoir | ||
| Area at Spillway Crest | 13,300Acres | XXX sm |
| Gross Storage at Spillway Crest | 995,300 Acre-feet | xxx MCM |
| Flood Control Allocation | 608,000 Acre-feet | xxx MCM |
| Water Conservation Allocation | 230,000 Acre-Feet | |
| Sedimentation Allocation (100-yr) | 50,000 Acre-feet | xxx MCM |
| Reservoir Design Flood | ||
| Total Volume | 613,000 Acre-feet | xxx MCM |
| Peak Inflow | 389,000 cfs | xxx cms |
| Peak Outflow | 7,000 cfs | xxx cms |
| Resulting Peak Water Surface Elevation | 1,233 feet, NGVD | XXX meters, NGVD |
| Spillway Design Flood | ||
| Total Volume | 1,390,000 Acre-feet | xxx MCM |
| Peak Inflow | 820,000 cfs | xxx cms |
| Peak Outflow | 375,315 cfs | xxx cms |
| Notes: | ||
| NGVD = National Geodetic Vertical Datum of 1929. | ||
| MCM = million cubic meters | ||
| cfs = cubic feet per second | ||
| cms = cubic meters per second | ||
| sm = square meters | ||
| "allocated" storages are not the same as present condition storages. |
Alamo Dam Flood Inundation Maps
Last Updated on November 20, 1997 by R. Stuart
