Maple Grove Reservoir Report
Nearby: Hendrickson Mulkey, Gryland Reservoir
Last Updated: December 13, 2025
Maple Grove, also known as Maple Grove Dam, is a private water resource structure located in Polk, Oregon.
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Summary
Completed in 1995, this earth dam serves primarily for irrigation purposes, with a storage capacity of 210 acre-feet and a surface area of 13 acres. Situated on an unnamed tributary of the Luckiamute River, Maple Grove Dam is regulated by the Oregon Water Resources Department and undergoes regular inspections to ensure its safety and compliance with state regulations.
With a low hazard potential and a moderate risk assessment rating, Maple Grove Dam is considered to be a reliable and well-maintained structure. Its spillway type is uncontrolled, with slide (sluice gate) outlet gates. The dam has not been modified since its completion and has not been rated for its current condition. While it does not have a designated Emergency Action Plan (EAP) in place, Maple Grove Dam remains an essential asset for irrigation and fish and wildlife pond purposes in the region.
Overall, Maple Grove Dam plays a crucial role in managing water resources in the area, providing essential irrigation support and contributing to the local ecosystem. Its location in a remote area with no downstream settlement ensures minimal risk to surrounding communities in the event of a failure. This private structure, designed by BOATWRIGHT, highlights the importance of sustainable water management practices and serves as a testament to the cooperation between private owners and state regulatory agencies in safeguarding our water resources for future generations.
Year Completed |
1995 |
Dam Height |
38 |
River Or Stream |
UNNAMED TRIB/LUCKIMUTE RIVER |
Primary Dam Type |
Earth |
Surface Area |
13 |
Drainage Area |
0.33 |
Nid Storage |
210 |
Outlet Gates |
Slide (sluice gate) |
Hazard Potential |
Low |
Nid Height |
38 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Luckiamute River Near Suver
|
3790cfs |
Willamette River At Corvallis
|
14500cfs |
Willamette River At Albany
|
13800cfs |
Santiam River At Jefferson
|
13800cfs |
Marys River Near Philomath
|
1060cfs |
Willamette River At Salem
|
35800cfs |
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.
Maple Grove
Luckiamute River
Yaquina River