Newman Lake Flood Control Dam Reservoir Report
Nearby: Martin Dam Kiblen North
Last Updated: December 15, 2025
Newman Lake Flood Control Dam, located in Spokane, Washington, was completed in 1976 with the primary purpose of flood risk reduction and recreation.
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Summary
The dam, constructed of earth and stone materials, stands at a structural height of 10 feet and a hydraulic height of 13 feet. It has a maximum storage capacity of 11,300 acre-feet and covers a surface area of 1,200 acres, serving as a vital resource for the surrounding community.
The dam, situated on Thompson Creek and managed by the local government, is regulated by the Washington Department of Ecology. Despite its important role in flood control, the dam has been assessed as having a high hazard potential and poor condition, requiring regular inspections every five years. With the risk of potential emergencies looming, the dam's Emergency Action Plan (EAP) status and risk management measures are currently under evaluation, highlighting the need for ongoing monitoring and maintenance to ensure the safety of the surrounding area.
In addition to its critical flood control functions, Newman Lake Flood Control Dam offers recreational opportunities for residents and visitors. With its picturesque location and proximity to natural amenities, the dam serves as a popular destination for outdoor activities and serves as a reminder of the delicate balance between water resource management and environmental conservation in the face of changing climate patterns.
Year Completed |
1976 |
Dam Length |
8400 |
River Or Stream |
Thompson Creek |
Primary Dam Type |
Earth |
Surface Area |
1200 |
Hydraulic Height |
13 |
Drainage Area |
28.6 |
Nid Storage |
11300 |
Structural Height |
10 |
Hazard Potential |
High |
Foundations |
Rock, Soil |
Nid Height |
13 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Spokane River Nr Post Falls Id
|
19800cfs |
Spokane River Blw Blackwell Nr Coeur D Alene Id
|
20400cfs |
Little Spokane River At Dartford
|
222cfs |
Spokane River At Spokane
|
17500cfs |
Hangman Creek At Spokane
|
98cfs |
Little Spokane River Near Dartford
|
527cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Newman Lake Flood Control Dam