Sullivan No. 2 Reservoir Report
Nearby: Fossil Dam Lynx Dam
Last Updated: December 13, 2025
Sullivan No.
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Summary
2 is a Federal-owned dam located in Natrona, Wyoming, specifically in the city of LYSITE along the HOGLAND DRAW river or stream. Built in 1992, the dam serves multiple purposes including fire protection, stock, and small fish pond maintenance. With a height of 26 feet and a length of 560 feet, Sullivan No. 2 has a storage capacity of 176 acre-feet, making it a vital water resource for the surrounding area. The dam's low hazard potential and fair condition assessment ensure its continued reliability for the community.
Despite its relatively small surface area of 4 acres, Sullivan No. 2 plays a crucial role in water management and conservation efforts in the region. The dam is regulated by the Wyoming State Engineer's Office and undergoes regular inspections and maintenance to ensure its safety and functionality. With a moderate risk assessment rating of 3, the dam operates under the supervision of the Sacramento District of the US Army Corps of Engineers. Overall, Sullivan No. 2 stands as a testament to responsible water resource management and climate resilience in Wyoming.
As a key component of the local water infrastructure, Sullivan No. 2 exemplifies the importance of sustainable dam construction and operation. The dam's earth core and stone foundation contribute to its structural integrity, while the uncontrolled spillway and lack of outlet gates ensure efficient water flow management. With a focus on fire protection, livestock support, and ecological preservation, Sullivan No. 2 serves as a vital lifeline for the community of LYSITE and the surrounding area, showcasing the intersection of water resource management and climate resilience in the region.
Year Completed |
1992 |
Dam Length |
560 |
Dam Height |
26 |
River Or Stream |
HOGLAND DRAW |
Primary Dam Type |
Earth |
Surface Area |
4 |
Hydraulic Height |
19 |
Drainage Area |
1.3 |
Nid Storage |
176 |
Structural Height |
26 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
26 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Middle Fork Powder River Near Barnum
|
7cfs |
Fivemile Creek Near Shoshoni
|
83cfs |
Wind River Ab Boysen Reservoir
|
666cfs |
Wind R Bl Boysen Res Wyo
|
819cfs |
Wind River At Riverton
|
366cfs |
Little Wind River Near Riverton
|
142cfs |
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.
Sullivan No. 2
E-K Creek
Badwater Creek