Williamson No. 1

Significant HazardPoor ConditionEmergency Action Plan: No

Location

CountyEl Dorado
River/StreamTr Weber Creek
Coordinates38.75550, -120.93720

Physical Characteristics

Dam TypeEarth
NID Height42 ft
Dam Height42 ft
Dam Length240 ft
Year Completed1926 (100 years old)

Storage & Hydraulics

NID Storage117 acre-ft
Max Storage117 acre-ft
Surface Area11 acres
Drainage Area1 sq mi

Ownership & Safety

PurposeWater Supply
OwnerMacy Mak Chan, Michael Chan, and Melinda Lau
Owner TypePrivate
Hazard ClassificationSignificant
Condition AssessmentPoor
Last Inspection04/15/2025
Emergency Action PlanNo

Identifiers

NID IDCA00608
Federal IDCA00608
More InfoState Dam Safety Program

Nearby Dams

Schubin 0.9 mi Significant Indian Creek 2.2 mi High Cross Creek Ranch 2.7 mi Low Jacobs Creek 2.8 mi Low Gastaldi 3.3 mi Low Volo Mining Company 4.4 mi High Shingle Springs Band Of Miwok Indians 4.9 mi Significant Straza 5.8 mi Low Cameron Park 5.9 mi High Holiday Lake 6.6 mi Significant