Long Lake East Dam Reservoir Report

Last Updated: December 13, 2025

Long Lake East Dam, located in Spokane, Washington, is a Federal-owned structure managed by the US Fish and Wildlife Service Office of Engineering.


°F

°F

mph

Wind

%

Humidity

Summary

Built in 1960, this Earth-type dam stands at 25 feet high and spans a length of 2100 feet, creating a Fish and Wildlife Pond for conservation purposes. With a maximum storage capacity of 9178 acre-feet and a normal storage level of 1238 acre-feet, the dam plays a crucial role in managing water resources for the surrounding area.

Despite being classified as having a low hazard potential and fair condition assessment, Long Lake East Dam is considered to have a very high risk level due to its location and structural characteristics. The dam features a Controlled spillway with a width of 10 feet and other Controlled outlet gates. While it has not undergone recent modifications, the dam is subject to a regular inspection schedule to ensure its safe operation and compliance with regulatory standards.

Overall, Long Lake East Dam serves as a vital infrastructure for the protection of fish and wildlife in the region, with the Fish and Wildlife Service overseeing its design, construction, and operation. As water resource and climate enthusiasts, it is essential to monitor the condition and risk level of dams like Long Lake East Dam to safeguard the environment and surrounding communities from potential hazards and ensure sustainable water management practices.

Year Completed

1960

Dam Length

2100

Dam Height

25

River Or Stream

unnamed tributary

Primary Dam Type

Earth

Surface Area

234

Hydraulic Height

11

Drainage Area

4.31

Nid Storage

9178

Structural Height

25

Outlet Gates

Other Controlled

Hazard Potential

Low

Foundations

Soil

Nid Height

25
       
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.