Robert L. Matheson

High HazardSatisfactory ConditionEmergency Action Plan: Yes

Location

CountyNapa
Nearest CitySt. Helena
River/StreamElder Creek
Coordinates38.51240, -122.27790

Physical Characteristics

Dam TypeEarth
NID Height32 ft
Dam Height32 ft
Dam Length390 ft
Year Completed1954 (72 years old)

Storage & Hydraulics

NID Storage90 acre-ft
Max Storage90 acre-ft
Surface Area12 acres
Drainage Area1 sq mi

Ownership & Safety

PurposeWater Supply
OwnerSage Canyon, LLC
Owner TypePrivate
Hazard ClassificationHigh
Condition AssessmentSatisfactory
Last Inspection10/06/2025
Emergency Action PlanYes

Identifiers

NID IDCA00982
Federal IDCA00982
More InfoState Dam Safety Program

Nearby Dams

Bassett Brown 0.9 mi Significant Lake La Verne 5.2 mi Significant Linda Vista 5.3 mi Significant Conn Creek 5.6 mi High Foss Valley 5.9 mi High Moskowite 5.9 mi Low Rector Creek 6.0 mi High Circle S 6.4 mi High Maxville 6.5 mi High Naz Lake 7.6 mi Significant