Summary
This rockfill dam, completed in 1930, serves primarily for recreational purposes on the Lincoln Creek. Standing at a height of 56 feet and with a hydraulic height of 55 feet, Grizzly has a storage capacity of 987 acre-feet and a drainage area of 15 square miles.
The dam has a spillway width of 100 feet and an uncontrolled spillway type, with a maximum discharge capacity of 3350 cubic feet per second. Regular inspections have deemed the dam's condition as satisfactory, although it has a high hazard potential. Grizzly has undergone modifications in 1994 for both hydraulic and structural improvements. With a risk assessment rating of moderate, the dam is managed to mitigate potential risks and ensure public safety in case of emergencies.
Water resource and climate enthusiasts will find Grizzly to be an intriguing structure due to its historical significance, engineering design, and environmental impact. As a vital component of the water infrastructure in the region, Grizzly plays a crucial role in water management and recreation activities along the Lincoln Creek. Its presence highlights the delicate balance between human needs and the conservation of natural resources, making it a focal point for those interested in sustainable water resource practices and climate resilience initiatives in the area.
Years Modified |
1994 - Hydraulic, 1994 - Structural |
Year Completed |
1930 |
Dam Length |
792 |
Dam Height |
56 |
River Or Stream |
LINCOLN CREEK |
Primary Dam Type |
Rockfill |
Surface Area |
44 |
Hydraulic Height |
55 |
Drainage Area |
15 |
Nid Storage |
987 |
Structural Height |
65 |
Outlet Gates |
Slide (sluice gate) - 2 |
Hazard Potential |
High |
Foundations |
Rock, Soil |
Nid Height |
65 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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 |
|---|---|---|
Portal Campground
|
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Portal
|
||
Lost Man
|
||
Lost Man Campground
|
||
Lincoln Creek dispersed campsite #8
|
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Lincoln Creek dispersed campsite #7
|
Grizzly
The Upper
Lower (Bottom Four)