Morgan is an earth dam located in Napa County, California. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 34 ft34 ft tall and 620 ft long, taller than 78% of U.S. dams with a recorded height. 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 Morgan
Morgan is a dam in Napa, California. The dam is owned by William and Barbara Morgan (private). It impounds the Tr Gordon Val Cr.
The dam stands 34 feet tall and stretches 620 feet across, creates a reservoir covering 6 acres, has a maximum storage capacity of 94 acre-feet, and collects water from a drainage area of 0 square miles.
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 01/13/2026.
At 34 feet, this dam is taller than 78% of dams nationwide.
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Location
| State | California |
| County | Napa |
| River/Stream | Tr Gordon Val Cr |
| Coordinates | 38.33640, -122.09890 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 34 ft |
| Dam Height | 34 ft |
| Dam Length | 620 ft |
Storage & Hydraulics
| NID Storage | 94 acre-ft |
| Max Storage | 94 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Other |
| Owner | William and Barbara Morgan |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 01/13/2026 |
| Emergency Action Plan | No |
Identifiers
| NID ID | CA01297 |
| Federal ID | CA01297 |
| More Info | State Dam Safety Program |