Big Creek #2 (Upper) Reservoir Report
Nearby: Big Creek #1 (Lower) Olalla
Last Updated: December 13, 2025
Big Creek #2 (Upper) is a crucial water supply infrastructure located in Newport, Oregon, owned and regulated by the local government.
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Summary
The earth dam, completed in 1970, stands at a height of 56 feet and has a storage capacity of 1190 acre-feet, serving the primary purpose of water supply. The dam has a spillway type of "Uncontrolled" and a high hazard potential, with an unsatisfactory condition assessment as of June 2021.
With a drainage area of 2.83 square miles and a maximum discharge capacity of 2000 cubic feet per second, Big Creek #2 (Upper) plays a significant role in managing water resources in the region. The dam's location in the Portland District ensures its importance in the overall water infrastructure of the area. Despite its age, ongoing inspections, and state regulation, the dam faces moderate risk, highlighting the need for continued monitoring and risk management measures.
Water resource and climate enthusiasts will find Big Creek #2 (Upper) an intriguing subject, given its critical role in supplying water to the surrounding community. The dam's design, construction, and operational aspects provide valuable insights into water management practices and the challenges associated with maintaining aging infrastructure in the face of changing climate conditions. As efforts are made to ensure the safety and efficacy of this vital water supply structure, its story serves as a reminder of the interconnectedness of water resources and the environment.
Year Completed |
1970 |
Dam Length |
430 |
Dam Height |
56 |
River Or Stream |
Big Creek |
Primary Dam Type |
Earth |
Surface Area |
30 |
Hydraulic Height |
54 |
Drainage Area |
2.83 |
Nid Storage |
1190 |
Structural Height |
58 |
Outlet Gates |
Slide (sluice gate) |
Hazard Potential |
High |
Nid Height |
58 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Siletz River At Siletz
|
4760cfs |
Alsea River Near Tidewater
|
2090cfs |
East Fork Lobster Creek Near Alsea
|
37cfs |
Marys River Near Philomath
|
1060cfs |
Willamette River At Corvallis
|
14500cfs |
Luckiamute River Near Suver
|
3790cfs |
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.
Area Campgrounds
| Location | Reservations | Toilets |
|---|---|---|
Port Of Newport Marina and RV Park
|
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South Beach State Park
|
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Group Site 2
|
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Group Site 3
|
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Group Site 1
|
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Beverly Beach State Park
|
Big Creek #2 (Upper)
Airport Ramp