Lolonis Vineyards Reservoir Report

Last Updated: December 5, 2025

Lolonis Vineyards, located in Calpella, Mendocino County, California, is not only a private vineyard but also plays a crucial role in water resource management.


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Summary

The dam on the property, completed in 1999, stands at a height of 67 feet and serves primarily for water supply purposes, including irrigation. With a storage capacity of 209 acre-feet, the dam helps support the vineyard's water needs while also contributing to the surrounding ecosystem.

Owned and regulated by the state of California, Lolonis Vineyards has been inspected regularly to ensure its structural integrity and safety. The dam, classified as an earth-type structure, poses a high hazard potential but has been assessed as satisfactory in condition. Its location on the Tr W Fk Russian River, within the Sacramento District, underscores the importance of responsible water management in this region.

With a surface area of 10 acres and a drainage area of 0.71 square miles, Lolonis Vineyards showcases a commitment to sustainable practices while harnessing water resources for agricultural productivity. This innovative approach, alongside its compliance with state regulations and regular inspections, highlights the vineyard's dedication to balancing water needs with environmental stewardship in the face of a changing climate.

Year Completed

1999

Dam Length

325

Dam Height

67

River Or Stream

Tr W Fk Russian R

Primary Dam Type

Earth

Surface Area

10

Hydraulic Height

61

Drainage Area

0.71

Nid Storage

209

Hazard Potential

High

Nid Height

67
       
Seasonal Comparison

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.