Summary
1, also known as Golden Eye Reservoir, is a private water resource located in Natrona, Wyoming. This reservoir was completed in 1914 and serves primarily for irrigation purposes, with a storage capacity of 12,351 acre-feet and a surface area of 700 acres. The dam, standing at a height of 20 feet, is classified as an Earth dam with a stone core and soil foundation.
Despite its low hazard potential and fair condition assessment, Johnson No. 1 is regulated and inspected by the state of Wyoming, demonstrating a commitment to ensuring its safety and functionality. The reservoir is situated offstream from Middle Casper Creek and is equipped with a slide gate outlet for water release. Its spillway, uncontrolled in type, has a width of 300 feet to manage excess water flow during periods of high rainfall or snowmelt.
With a moderate risk assessment score of 3, Johnson No. 1 remains a vital water source for the region, supporting various purposes such as fire protection, stock, and water supply. Its location in Casper, Wyoming, and its historical significance as a key irrigation infrastructure underscore its importance in managing water resources and mitigating the impacts of climate variability in the area.
Year Completed |
1914 |
Dam Length |
6654 |
Dam Height |
20 |
River Or Stream |
MIDDLE CASPER CREEK OFFSTREAM |
Primary Dam Type |
Earth |
Surface Area |
700 |
Hydraulic Height |
15 |
Nid Storage |
12351 |
Structural Height |
20 |
Outlet Gates |
Slide (sluice gate) - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
20 |
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.
Johnson No. 1