Griffith Stock Reservoir Report
Nearby: Roberts Luman Draw Snider No. 6
Last Updated: December 13, 2025
Griffith Stock, located in Sheridan, Wyoming, is a privately-owned dam designed by William Long and completed in 1964.
°F
°F
mph
Wind
%
Humidity
Summary
This Earth dam, with a height of 30 feet and a length of 220 feet, serves multiple purposes including fire protection, stock watering, and small fish pond management. The dam is situated on Griffith Draw, a river/stream, within the Omaha District and Congressional District 00 of Wyoming, represented by Liz Cheney.
With a storage capacity of 47 acre-feet and a surface area of 3 acres, Griffith Stock is primarily used for fire protection and stock watering. Despite its low hazard potential and fair condition assessment, the dam is subject to state regulation, permitting, inspection, and enforcement by the Wyoming State Engineer's Office. The dam's spillway, which is uncontrolled and 30 feet wide, helps regulate water discharge during periods of excess flow.
Although Griffith Stock has not undergone recent modifications, it is inspected every 5 years to ensure its structural integrity and safety. The dam's risk assessment indicates a moderate level of risk (3), prompting the need for continued monitoring and potentially implementing risk management measures in the future. Overall, Griffith Stock serves as a vital resource for water management and climate resilience in the region.
Year Completed |
1964 |
Dam Length |
220 |
Dam Height |
30 |
River Or Stream |
GRIFFITH DRAW |
Primary Dam Type |
Earth |
Surface Area |
3 |
Hydraulic Height |
25 |
Nid Storage |
47 |
Structural Height |
32 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
32 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Powder River At Arvada
|
180cfs |
Clear Creek Near Arvada
|
256cfs |
Wild Horse Creek Near Arvada
|
0cfs |
Prairie Dog Creek Near Acme
|
19cfs |
Tongue River At State Line Nr Decker Mt
|
243cfs |
Piney Creek At Kearny
|
113cfs |
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.
Griffith Stock