Thirtieth Street Dam Reservoir Report
Nearby: Martin Arroyo Dam Bolack No 1 Dam
Last Updated: December 27, 2025
Thirtieth Street Dam, located in Farmington, New Mexico, serves as a vital structure for flood risk reduction along the College Arroyo.
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Summary
Built in 1979 by Bohannon Huston, Inc., this earth dam stands at 22 feet high and stretches 550 feet in length, with a storage capacity of 135 acre-feet. Despite its crucial role in mitigating flood hazards, the dam's condition assessment is labeled as poor, posing a high hazard potential.
This dam is regulated by the Office of the State Engineer in New Mexico, with state permitting, inspection, and enforcement in place to ensure its safety and functionality. The spillway, with a width of 28 feet, is uncontrolled, allowing for a maximum discharge of 3107 cubic feet per second. The dam's location in San Juan County makes it a key player in water resource management in the region, highlighting the importance of maintaining and monitoring its structural integrity closely.
While the Thirtieth Street Dam plays a critical role in flood risk reduction, its current poor condition warrants attention and potential risk management measures to ensure the safety of surrounding communities. As water resource and climate enthusiasts, it is important to stay informed about the state of infrastructure like this dam and advocate for necessary investments in maintenance and upgrades to protect against potential disasters and preserve the area's water resources for future generations.
Year Completed |
1979 |
Dam Length |
550 |
Dam Height |
22 |
River Or Stream |
COLLEGE ARROYO |
Primary Dam Type |
Earth |
Surface Area |
7.6 |
Drainage Area |
0.96 |
Nid Storage |
135 |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
22 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
Thirtieth Street Dam