G-K Reservoir Report
Nearby: Reynolds No. 2 Johnson No. 1
Last Updated: December 13, 2025
G-K is a privately owned irrigation dam located on North Casper Creek in Natrona County, Wyoming.
°F
°F
mph
Wind
%
Humidity
Summary
The dam, constructed in 1963, stands at a height of 23 feet and has a normal storage capacity of 987 acre-feet. With a surface area of 152 acres, G-K serves the primary purpose of irrigation for the surrounding area.
Despite its low hazard potential and fair condition assessment, G-K is subject to regular inspections and enforcement by the Wyoming State Engineer's Office. The dam features an uncontrolled spillway with a width of 50 feet and has not been modified in recent years. With a moderate risk assessment rating of 3, the dam is deemed to have a manageable level of risk associated with its operation.
Located just 20 miles from Casper, G-K plays a vital role in water resource management in the region. As water resource and climate enthusiasts, understanding the infrastructure and operation of dams like G-K is crucial for ensuring the sustainability and safety of our water supply systems.
Year Completed |
1963 |
Dam Length |
1850 |
Dam Height |
23 |
River Or Stream |
NORTH CASPER CREEK |
Primary Dam Type |
Earth |
Surface Area |
152 |
Hydraulic Height |
18 |
Nid Storage |
1587 |
Structural Height |
23 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
23 |
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.
G-K