Norton No. 2
Key Takeaway
Norton No. 2 is classified as high hazard in California. It was completed in 1956 and is 70 years old. Its primary use is water supply. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Height | 28 ft (taller than 27.2% in CA) |
| Dam Length | 430 ft |
| Dam Type | Earth |
| Max Storage | 102 acre-ft |
| Surface Area | 12 acres |
| Drainage Area | 0 sq mi |
| Year Completed | 1956 (70 years old) |
| NID ID | CA01041 |
Safety Information
Loss of human life is likely if the dam fails.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
Ridge Vineyards
Private
Nearby Dams
Cook No. 2
Sonoma, CA
High Hazard 35 ftDennis No. 2
Sonoma, CA
Low Hazard 60 ftLytton
Sonoma, CA
High Hazard 34 ftFoss Creek North Area
Sonoma, CA
High Hazard 20 ftCoen C-3
Sonoma, CA
Low Hazard 97 ftBudge
Sonoma, CA
Significant Hazard 28 ftHealdsburg Recreation
Sonoma, CA
Low Hazard 15 ftVineyard Subdivision
Sonoma, CA
Significant Hazard 26 ftFrequently Asked Questions
What is the hazard classification of Norton No. 2?
Norton No. 2 is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Norton No. 2?
Norton No. 2 is owned by Ridge Vineyards (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Norton No. 2 built?
Norton No. 2 was completed in 1956, making it 70 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
What is the primary purpose of Norton No. 2?
Norton No. 2 serves the following purposes: Water Supply, Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Norton No. 2?
Norton No. 2 has a dam height of 28 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.
When was Norton No. 2 last inspected?
Norton No. 2 was last inspected on October 4, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.