Summary
This private earth and rockfill dam stands at a height of 35 feet with a hydraulic height of 16 feet, providing a storage capacity of 2400 acre-feet. The dam's spillway type is uncontrolled, with a width of 50 feet, and features an outlet valve for water release.
Despite its low hazard potential, the dam was rated as unsatisfactory during its last inspection in June 2019. The condition assessment raised concerns, prompting a moderate risk assessment rating of 3. While the dam has not undergone significant modifications in recent years, its emergency action plan (EAP) status is unclear, raising questions about preparedness and risk management measures. For water resource and climate enthusiasts, the Little High Rock Dam represents a key infrastructure point in the region, highlighting the importance of proper maintenance and monitoring to ensure safety and efficiency in water management.
Dam Length |
300 |
Dam Height |
35 |
River Or Stream |
LITTLE HIGH ROCK CREEK |
Primary Dam Type |
Earth |
Surface Area |
255 |
Hydraulic Height |
16 |
Drainage Area |
210 |
Nid Storage |
2400 |
Structural Height |
35 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Rock |
Nid Height |
35 |
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.
Mahogany Canyon Campsite
High Rock Canyon Campsite #1
High Rock Canyon Entrance Campsite
High Rock Canyon Campsite #2
Pole Canyon Campsite
Yellow Rock Campsite
Little High Rock Dam