Rsn Detention Dam 43 is a gravity dam located in Sandoval County, New Mexico, built in 1968. It carries a Low hazard potential classification.
Dam profile
NID height · 29 ft29 ft tall and 457 ft long, taller than 65% 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 concrete gravity section and the water level is illustrative.
About Rsn Detention Dam 43
The primary purpose of Rsn Detention Dam 43 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 Doi BLM (federal). It impounds the Arroyo Cachulie near San Ysidro.
The dam stands 29 feet tall and stretches 457 feet across, creates a reservoir covering 33 acres, and has a maximum storage capacity of 89 acre-feet. Completed in 1968, the structure is well into its service life at over 50 years 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. The most recent inspection on record was 12/20/2017.
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Location
| State | New Mexico |
| County | Sandoval |
| Nearest City | San Ysidro |
| River/Stream | Arroyo Cachulie |
| Coordinates | 35.66514, -106.95829 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 29 ft |
| Dam Length | 457 ft |
| Year Completed | 1968 (58 years old) |
Storage & Hydraulics
| NID Storage | 89 acre-ft |
| Max Storage | 89 acre-ft |
| Surface Area | 33 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Debris Control |
| Owner | Doi BLM |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 12/20/2017 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NM00711 |
| Federal ID | NM00711 |
| More Info | State Dam Safety Program |