Ponderosa Dam is an earth dam located in Scott County, Tennessee, built in 1965. It carries a Significant hazard potential classification.
Dam profile
NID height · 13 ft13 ft tall and 425 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 Ponderosa Dam
Ponderosa Dam is a dam in Scott, Tennessee. The dam is owned by Town of Oneida (private). It impounds the Niggs Creek near Oneida.
The dam stands 13 feet tall and stretches 425 feet across, creates a reservoir covering 9 acres, has a maximum storage capacity of 77 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1965, 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. The most recent inspection on record was 08/05/2020.
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Location
| State | Tennessee |
| County | Scott |
| Nearest City | Oneida |
| River/Stream | Niggs Creek |
| Coordinates | 36.47972, -84.53528 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 13 ft |
| Dam Length | 425 ft |
| Year Completed | 1965 (61 years old) |
Storage & Hydraulics
| NID Storage | 77 acre-ft |
| Max Storage | 77 acre-ft |
| Normal Storage | 27 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 1 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Owner | Town of Oneida |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 08/05/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | TN15101 |
| Federal ID | TN15101 |
| More Info | State Dam Safety Program |