Loch Carden Dam is an earth dam located in St. Tammany Parish, Louisiana, built in 1980. It carries a Significant hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 20 ft20 ft tall and 810 ft long. 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 Loch Carden Dam
The primary purpose of Loch Carden Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by The Highlands Homeowners Association of St. Tammany, Inc. (private). It impounds the Tr-bills Creek near Covington.
The dam stands 20 feet tall and stretches 810 feet across, creates a reservoir covering 33 acres, has a maximum storage capacity of 320 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1980, the structure is 46 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 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 12/02/2024.
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Location
| State | Louisiana |
| County | St. Tammany |
| Nearest City | Covington |
| River/Stream | Tr-bills Creek |
| Coordinates | 30.63657, -90.10099 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 19 ft |
| Dam Length | 810 ft |
| Year Completed | 1980 (46 years old) |
Storage & Hydraulics
| NID Storage | 320 acre-ft |
| Max Storage | 320 acre-ft |
| Normal Storage | 270 acre-ft |
| Surface Area | 33 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 870 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | The Highlands Homeowners Association of St. Tammany, Inc. |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 12/02/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | LA00600 |
| Federal ID | LA00600 |
| More Info | State Dam Safety Program |