Wastewater Storage
Wastewater Storage is an earth dam located in Placer County, California, built in 1978. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Wastewater Storage
The primary purpose of Wastewater Storage is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by City Of Colfax (local government). It impounds the Tr Smuthers Ravine.
The dam stands 75 feet tall and stretches 385 feet across, creates a reservoir covering 7 acres, has a maximum storage capacity of 212 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1978, the structure is 48 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 10/16/2025.
At 75 feet, this dam is taller than 97% of all dams in the United States.
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Location
| State | California |
| County | Placer |
| River/Stream | Tr Smuthers Ravine |
| Coordinates | 39.07980, -120.93930 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 75 ft |
| Dam Height | 75 ft |
| Dam Length | 385 ft |
| Year Completed | 1978 (48 years old) |
Storage & Hydraulics
| NID Storage | 212 acre-ft |
| Max Storage | 212 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Water Supply |
| Owner | City of Colfax |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/16/2025 |
| Emergency Action Plan | No |
Identifiers
| NID ID | CA01137 |
| Federal ID | CA01137 |
| More Info | State Dam Safety Program |