Twin Lakes
Twin Lakes is a dam located in Kootenai County, Idaho, built in 2005. It carries a Significant hazard potential classification and has a fair condition assessment.
About Twin Lakes
The primary purpose of Twin Lakes is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is local government-owned. It impounds the Twin Lakes Rathdrum Creek near Rathdrum.
The dam stands 14 feet tall and stretches 75 feet across, creates a reservoir covering 959 acres, has a storage capacity of 9,090 acre-feet, and collects water from a drainage area of 51 square miles. Completed in 2005, the structure is relatively new.
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. The most recent inspection on record was 08/10/2017.
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Location
| State | Idaho |
| County | Kootenai |
| Nearest City | Rathdrum |
| River/Stream | Twin Lakes Rathdrum Creek |
| Coordinates | 47.85820, -116.86440 |
Physical Characteristics
| NID Height | 14 ft |
| Dam Height | 14 ft |
| Dam Length | 75 ft |
| Year Completed | 2005 (21 years old) |
Storage & Hydraulics
| NID Storage | 9,090 acre-ft |
| Normal Storage | 9,090 acre-ft |
| Surface Area | 959 acres |
| Drainage Area | 51 sq mi |
| Max Discharge | 770 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 08/10/2017 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | ID00153 |
| Federal ID | ID00153 |
| More Info | State Dam Safety Program |