Jameson Vineyards

Tr Fagan Creek· Napa, California· Earth· 41 ft tall
Significant Hazard Water Supply Irrigation Recreation Private

Key Takeaway

Jameson Vineyards is classified as significant hazard in California. Its primary use is water supply. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Height 41 ft (taller than 49.2% in CA)
Dam Length375 ft
Dam TypeEarth
Max Storage75 acre-ft
Surface Area6 acres
Drainage Area1 sq mi
NID IDCA01417

Safety Information

Significant Hazard

No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.

Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?

Emergency Action Plan: No
Last Inspection: March 1, 2022
State Regulated: Yes
Regulatory Agency: DWR, Division of Safety of Dams

Ownership

John Anthony Family of Wines Napa Valley LLC

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Jameson Vineyards?

Jameson Vineyards is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.

Who owns and operates Jameson Vineyards?

Jameson Vineyards is owned by John Anthony Family of Wines Napa Valley LLC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

What is the primary purpose of Jameson Vineyards?

Jameson Vineyards serves the following purposes: Water Supply, Irrigation, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Jameson Vineyards?

Jameson Vineyards has a dam height of 41 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 Jameson Vineyards last inspected?

Jameson Vineyards was last inspected on March 1, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.

Data from the National Inventory of Dams (NID) maintained by the US Army Corps of Engineers. Dam conditions may have changed since the last update. This site is not affiliated with USACE. Do not use for emergency planning — contact your local dam safety program.