Eastdale Creek Detention No.2 Reservoir Report

Reservoir Report

Wyoming

Nearby: Eastdale Creek Detention No.1 Casper Parks No.2

Last Updated: December 14, 2025

Eastdale Creek Detention No.2, located in Casper, Wyoming, is a crucial structure designed for flood risk reduction along the Holman Draw.

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Summary

Constructed in 2008, this earth dam stands at a height of 16 feet, with a hydraulic height of 12 feet and a structural height of 19 feet. With a storage capacity of 83 acre-feet and a normal storage of 57 acre-feet, this detention facility covers a surface area of 5.13 acres and serves a drainage area of 1.89 square miles.

The dam's spillway, measuring 50 feet in width, is uncontrolled, allowing for a maximum discharge of 2304 cubic feet per second. Despite its high hazard potential, Eastdale Creek Detention No.2 is assessed to be in fair condition. The last inspection in April 2017 revealed that the structure meets regulatory standards, with a scheduled inspection frequency of 5 years. While the dam has no outlet gates, it plays a crucial role in mitigating flooding risks in the region, protecting communities and infrastructure along Holman Draw.

Managed by the local government and regulated by the State Engineer's Office, Eastdale Creek Detention No.2 is a key component of the flood risk management system in Natrona County, Wyoming. With its strategic location and design by Shane Porter PE 9475, this dam provides essential protection against inundation and serves as a vital asset in safeguarding the community from the impacts of extreme weather events and climate variability. Its presence underscores the importance of proactive water resource management and climate resilience efforts in the face of changing environmental conditions.

Year Completed	2008
Dam Length	2673
Dam Height	16
River Or Stream	HOLMAN DRAW
Primary Dam Type	Earth
Surface Area	5.13
Hydraulic Height	12
Drainage Area	1.89
Nid Storage	83
Structural Height	19
Outlet Gates	None
Hazard Potential	High
Foundations	Soil
Nid Height	19

Explore Interactive Map

EASTDALE CREEK DETENTION NO.2

Reservoir Report • Water Levels • Weather Forecast

December 14, 2025

Year_Completed	2008
Dam_Length	2673
Dam_Height	16
River_Or_Stream	HOLMAN DRAW
Primary_Dam_Type	Earth
Surface_Area	5.13
Hydraulic_Height	12
Drainage_Area	1.89
Nid_Storage	83
Structural_Height	19
Outlet_Gates	None
Hazard_Potential	High
Foundations	Soil
Nid_Height	19

Seasonal Comparison

Weather Forecast

Nearby Streamflow Levels

Deer Creek In Canyon 6.99cfs	7cfs
Box Elder Creek At Boxelder 26cfs	26cfs
Sweetwater River Near Alcova 27.1cfs	27cfs
Medicine Bow R Ab Seminoe Reservoir 35.8cfs	36cfs
North Platte River At Orin 592.0cfs	592cfs
L Medicine Bow R At Boles Spring 8.9cfs	9cfs

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.