Ana Mariaâ II Dam is an earth dam located in Ponce County, Puerto Rico, built in 1939. It carries a High hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 40 ft40 ft tall and 1,475 ft long, taller than 86% 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 embankment section and the water level is illustrative.
About Ana Mariaâ II Dam
The primary purpose of Ana Mariaâ II Dam is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Sucesion Serrallesâ Inc. (private). It impounds the Channel From Lago1 near Ponce.
The dam stands 40 feet tall and stretches 1,475 feet across, creates a reservoir covering 24 acres, has a maximum storage capacity of 563 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1939, 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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 02/12/2022.
At 40 feet, this dam is taller than 86% of dams nationwide.
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 Puerto Rico 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 | Puerto Rico |
| County | Ponce |
| Nearest City | Ponce |
| River/Stream | Channel From Lago1 |
| Coordinates | 18.06179, -66.56329 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 40 ft |
| Dam Height | 40 ft |
| Dam Length | 1,475 ft |
| Year Completed | 1939 (87 years old) |
Storage & Hydraulics
| NID Storage | 563 acre-ft |
| Max Storage | 563 acre-ft |
| Normal Storage | 373 acre-ft |
| Surface Area | 24 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 9,862 cfs |
| Spillway Type | None |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Sucesion Serrallesâ Inc. |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 02/12/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | PR00029 |
| Federal ID | PR00029 |
| More Info | State Dam Safety Program |