Brainard Lake is an other dam located in Boulder County, Colorado, built in 1943. It carries a Significant hazard potential classification.
Dam profile
NID height · 17 ft17 ft tall and 130 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 Brainard Lake
The primary purpose of Brainard Lake is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Usda Fs (federal). It impounds the South St Vrain Creek near Lyons.
The dam stands 17 feet tall and stretches 130 feet across, has a maximum storage capacity of 160 acre-feet, and collects water from a drainage area of 9 square miles. Completed in 1943, the structure is well-established, with more than 75 years of service.
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 10/23/2018.
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Location
| State | Colorado |
| County | Boulder |
| Nearest City | Lyons |
| River/Stream | South St Vrain Creek |
| Coordinates | 40.07860, -105.57280 |
Physical Characteristics
| Dam Type | Other |
| NID Height | 17 ft |
| Dam Height | 15 ft |
| Dam Length | 130 ft |
| Year Completed | 1943 (83 years old) |
Storage & Hydraulics
| NID Storage | 160 acre-ft |
| Max Storage | 160 acre-ft |
| Normal Storage | 85 acre-ft |
| Drainage Area | 9 sq mi |
| Max Discharge | 273 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Usda Fs |
| Owner Type | Federal |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 10/23/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CO01201 |
| Federal ID | CO01201 |
| More Info | State Dam Safety Program |