Green Lake Dam
Green Lake Dam is a concrete dam located in San Patricio County, Texas, built in 1940. It carries a Low hazard potential classification.
About Green Lake Dam
The primary purpose of Green Lake Dam is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by San Patricio County Drainage District (local government). It impounds the Tr-corpus Christi Bay near Portland.
The dam stands 35 feet tall and stretches 200 feet across, creates a reservoir covering 33 acres, has a maximum storage capacity of 462 acre-feet, and collects water from a drainage area of 9 square miles. Completed in 1940, the structure is well-established, with more than 75 years of service.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. The most recent inspection on record was 07/25/1988. That was over 37 years ago.
At 35 feet, this dam is taller than 82% of dams nationwide.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Texas |
| County | San Patricio |
| Nearest City | Portland |
| River/Stream | Tr-corpus Christi Bay |
| Coordinates | 27.88000, -97.29167 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 35 ft |
| Dam Height | 35 ft |
| Dam Length | 200 ft |
| Year Completed | 1940 (86 years old) |
Storage & Hydraulics
| NID Storage | 462 acre-ft |
| Max Storage | 462 acre-ft |
| Normal Storage | 198 acre-ft |
| Surface Area | 33 acres |
| Drainage Area | 9 sq mi |
| Spillway Type | None |
Ownership & Safety
| Purpose | Irrigation |
| Owner | SAN PATRICIO COUNTY DRAINAGE DISTRICT |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Last Inspection | 07/25/1988 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | TX06513 |
| Federal ID | TX06513 |
| More Info | State Dam Safety Program |