Summary
1 is a privately owned earth dam located in Johnson, Wyoming, with a primary purpose of providing fire protection, stock, or a small fish pond. Completed in 1969, this dam stands at a height of 30 feet and has a hydraulic height of 24 feet, serving as a crucial water resource for the surrounding area. The dam has a storage capacity of 90 acre-feet, with a normal storage level of 56 acre-feet and a surface area of 6 acres.
Despite being classified as having a low hazard potential, Rattlesnake No. 1 is regularly inspected to ensure its structural integrity and safety. The dam's condition was last assessed in June 2021 and was deemed to be in fair condition. With a moderate risk assessment rating of 3, measures are in place to manage potential risks associated with the dam. Located in the Rattlesnake Spring Draw, this dam plays a vital role in providing water for fire protection and livestock, highlighting its importance as a valuable water resource in the region for both humans and wildlife.
Year Completed |
1969 |
Dam Length |
469 |
Dam Height |
30 |
River Or Stream |
RATTLESNAKE SPRING DRAW |
Primary Dam Type |
Earth |
Surface Area |
6 |
Hydraulic Height |
24 |
Nid Storage |
90 |
Structural Height |
29 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
30 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Powder River At Arvada
|
156cfs |
Piney Creek At Kearny
|
113cfs |
Clear Creek Near Buffalo
|
12cfs |
Wild Horse Creek Near Arvada
|
0cfs |
Rock Creek Near Buffalo
|
70cfs |
South Piney Creek At Willow Park
|
0cfs |
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.
Rattlesnake No. 1