Blanchard Creek is a dam located in Bonner County, Idaho, built in 1910. It carries a Significant hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 19 ft19 ft tall and 60 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 Blanchard Creek
The primary purpose of Blanchard Creek is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is private-owned. It impounds the Blanchard Creek Blanchard Lake near Tweedie Wa..
The dam stands 19 feet tall and stretches 60 feet across, creates a reservoir covering 37 acres, has a storage capacity of 240 acre-feet, and collects water from a drainage area of 34 square miles. Completed in 1910, the structure is over a century 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 10/30/2017.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Idaho |
| County | Bonner |
| Nearest City | Tweedie Wa. |
| River/Stream | Blanchard Creek Blanchard Lake |
| Coordinates | 48.00465, -117.00213 |
Physical Characteristics
| NID Height | 19 ft |
| Dam Height | 19 ft |
| Dam Length | 60 ft |
| Year Completed | 1910 (116 years old) |
Storage & Hydraulics
| NID Storage | 240 acre-ft |
| Normal Storage | 240 acre-ft |
| Surface Area | 37 acres |
| Drainage Area | 34 sq mi |
| Max Discharge | 108 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 10/30/2017 |
| Emergency Action Plan | No |
Identifiers
| NID ID | ID00265 |
| Federal ID | ID00265 |
| More Info | State Dam Safety Program |