Rsn Detention Dam 40 Reservoir Report
Last Updated: December 26, 2025
Rsn Detention Dam 40, located in Cuba, New Mexico, is a gravity dam primarily designed for debris control along the Arroyo Cachulie.
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Summary
Built in 1968 by the Bureau of Land Management, this federal-owned structure stands at a hydraulic height of 29 feet and a structural height of 34 feet, with a total length of 1589 feet and a storage capacity of 54 acre-feet. While the dam's hazard potential is classified as low, its risk assessment indicates a moderate level of risk, highlighting the importance of ongoing monitoring and maintenance.
Despite not being regulated by the state or subject to inspection and enforcement measures, Rsn Detention Dam 40 serves a crucial function in managing water flow and debris in the surrounding area. The dam's uncontrolled spillway, with a width of 133 feet, helps mitigate potential flooding risks. While the structure's condition assessment is currently not rated, its emergency action plan status and risk management measures are not specified, suggesting a need for further evaluation and preparedness in case of emergencies.
As an integral part of the water resource infrastructure in Sandoval County, New Mexico, Rsn Detention Dam 40 plays a vital role in mitigating flood hazards and protecting downstream areas. With its moderate risk level and lack of recent assessment data, there is a clear need for continued monitoring and evaluation to ensure the dam's effectiveness and safety for the surrounding community. The dam's history of federal ownership and operation by the Bureau of Land Management underscores the importance of federal agencies in managing and maintaining critical water resources in the region.
Year Completed |
1968 |
Dam Length |
1589 |
River Or Stream |
ARROYO CACHULIE |
Primary Dam Type |
Gravity |
Surface Area |
17.8 |
Hydraulic Height |
29 |
Nid Storage |
54 |
Structural Height |
34 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
34 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Rio Puerco Abv Arroyo Chico Nr Guadalupe
|
2cfs |
Arroyo Chico Nr Guadalupe
|
0cfs |
Jemez River Near Jemez
|
17cfs |
Rio Grande At San Felipe
|
532cfs |
Rio Grande Below Cochiti Dam
|
699cfs |
Rio Grande Nr Alameda
|
652cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Rsn Detention Dam 40