Laguna Diversion Dam is a rockfill dam located in Yuma County, Arizona, built in 1909. It carries a Low hazard potential classification.
Dam profile
NID height · 43 ft43 ft tall and 4,780 ft long, taller than 89% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic rockfill embankment section and the water level is illustrative.
About Laguna Diversion Dam
The primary purpose of Laguna Diversion Dam is debris control. The dam is designed to catch sediment, rocks, and debris carried by flowing water — particularly important in areas prone to mudslides or heavy erosion. The dam is owned by Bureau of Reclamation (federal). It impounds the Colorado River.
The dam stands 43 feet tall and stretches 4,780 feet across, has a maximum storage capacity of 1,600 acre-feet, and collects water from a drainage area of 287,000 square miles. Completed in 1909, the structure is over a century old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life.
At 43 feet, this dam is taller than 89% of dams nationwide.
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Location
| State | Arizona |
| County | Yuma |
| Nearest City | None |
| River/Stream | Colorado River |
| Coordinates | 32.82295, -114.49383 |
Physical Characteristics
| Dam Type | Rockfill |
| NID Height | 43 ft |
| Dam Height | 43 ft |
| Dam Length | 4,780 ft |
| Year Completed | 1909 (117 years old) |
Storage & Hydraulics
| NID Storage | 1,600 acre-ft |
| Max Storage | 1,600 acre-ft |
| Normal Storage | 900 acre-ft |
| Drainage Area | 287,000 sq mi |
| Max Discharge | 487,000 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Debris Control |
| Owner | Bureau of Reclamation |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | AZ10315 |
| Federal ID | AZ10315 |
| More Info | State Dam Safety Program |