Olivenhain Reservoir Reservoir Report

Last Updated: December 5, 2025

Olivenhain Reservoir, located in San Diego County, California, was constructed in 2003 by the city of Encinitas.


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Summary

The reservoir's primary purpose is to store imported water from the Colorado River and Northern California for use by the city's residents. The reservoir has a capacity of 24,000 acre-feet and is primarily filled by water from the San Diego County Water Authority. Additionally, the reservoir receives water from local surface flow and snowpack providers, including the San Dieguito River and the San Elijo Lagoon. The reservoir also supplies water for agricultural use in the surrounding area. Recreational activities, such as fishing and boating, are allowed on the reservoir with proper permits. The Olivenhain Reservoir serves as a vital water source for the region's residents and supports the local agriculture and recreational industries.

Reservoir Details

24hr Change None%
Percent of Normal None%
Minimum
Maximum
Average
Dam_Height 309
Hydraulic_Height 306
Drainage_Area 0.64
Year_Completed 2003
Nid_Storage 24900
River_Or_Stream Tr Escondido Creek
Surface_Area 203
Hazard_Potential High
Dam_Length 2500
Primary_Dam_Type Roller-Compacted Concrete
Nid_Height 309
       
Seasonal Comparison
Storage Levels
Pool Elevation Levels
Top Conserv Storage Levels
Inflow Levels

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.

Hazard Potential Classification

High
Dams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.