Lower Tansil Dam
Lower Tansil Dam is a concrete dam located in Eddy County, New Mexico, built in 1970. It carries a Significant hazard potential classification and has a poor condition assessment.
About Lower Tansil Dam
The primary purpose of Lower Tansil Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by City Of Carlsbad (local government). It impounds the Pecos River near Carlsbad.
The dam stands 18 feet tall and stretches 430 feet across, creates a reservoir covering 43 acres, has a maximum storage capacity of 252 acre-feet, and collects water from a drainage area of 18,000 square miles. Completed in 1970, the structure is well into its service life at over 50 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 02/26/2019.
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Location
| State | New Mexico |
| County | Eddy |
| Nearest City | Carlsbad |
| River/Stream | Pecos River |
| Coordinates | 32.41110, -104.22250 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 18 ft |
| Dam Height | 14 ft |
| Dam Length | 430 ft |
| Year Completed | 1970 (56 years old) |
Storage & Hydraulics
| NID Storage | 252 acre-ft |
| Max Storage | 252 acre-ft |
| Normal Storage | 252 acre-ft |
| Surface Area | 43 acres |
| Drainage Area | 18,000 sq mi |
| Max Discharge | 11,180 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | CITY OF CARLSBAD |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 02/26/2019 |
| Emergency Action Plan | No |
Identifiers
| NID ID | NM00183 |
| Federal ID | NM00183 |
| More Info | State Dam Safety Program |