Isabel Lake No. 2 is an earth dam located in Santa Clara County, California. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 18 ft18 ft tall and 320 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 Isabel Lake No. 2
The primary purpose of Isabel Lake No. 2 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 O'neal, Swenson and Mcdonald (private). It impounds the Tr Isabel Creek.
The dam stands 18 feet tall and stretches 320 feet across, creates a reservoir covering 12 acres, and has a maximum storage capacity of 95 acre-feet.
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 06/06/2025.
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Location
| State | California |
| County | Santa Clara |
| River/Stream | Tr Isabel Creek |
| Coordinates | 37.32740, -121.53220 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 320 ft |
Storage & Hydraulics
| NID Storage | 95 acre-ft |
| Max Storage | 95 acre-ft |
| Surface Area | 12 acres |
Ownership & Safety
| Purpose | Water Supply |
| Owner | O'neal, Swenson and Mcdonald |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/06/2025 |
| Emergency Action Plan | No |
Identifiers
| NID ID | CA01255 |
| Federal ID | CA01255 |
| More Info | State Dam Safety Program |