Captain Tom
Captain Tom is an earth dam located in San Juan County, New Mexico, built in 1937. It carries a High hazard potential classification and has a fair condition assessment.
About Captain Tom
The primary purpose of Captain Tom is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Bia (federal). It impounds the To-dil-hil Wash near Newcomb.
The dam stands 29 feet tall and stretches 2,177 feet across, creates a reservoir covering 100 acres, has a maximum storage capacity of 1,080 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1937, the structure is well-established, with more than 75 years of service.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 09/13/2023.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The New Mexico dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | New Mexico |
| County | San Juan |
| Nearest City | Newcomb |
| River/Stream | To-dil-hil Wash |
| Coordinates | 36.29215, -108.74882 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 29 ft |
| Dam Height | 29 ft |
| Dam Length | 2,177 ft |
| Year Completed | 1937 (89 years old) |
Storage & Hydraulics
| NID Storage | 1,080 acre-ft |
| Max Storage | 1,080 acre-ft |
| Normal Storage | 689 acre-ft |
| Surface Area | 100 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 15,131 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | BIA |
| Owner Type | Federal |
| Hazard Classification | High |
| Condition Assessment | Fair |
| Last Inspection | 09/13/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NM00693 |
| Federal ID | NM00693 |
| More Info | State Dam Safety Program |