Sullivan No. 2 dam
Sullivan No. 2
Sullivan No. 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.
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.
- 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.
- 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.
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, environmental 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.
Plan around the weather
Same NOAA / yr.no feed Snoflo's iOS app uses. Watch the precipitation column on the meteogram -- rain on the basin upstream typically lifts inflow 24-72 hours later.
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind. Each cell is colour-coded relative to the column min/max.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day temperature & precipitation
Daily temperatures, snow, and rain projected over the next two weeks.
Nearby streamflow gauges
USGS streamgauges around Sullivan No. 2 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Powder River At Sussex | 144 cfs | → |
| Nf Powder River Below Pass Creek | 50 cfs | → |
| Clear Creek Near Buffalo | 33 cfs | → |
| North Fork Powder River Near Hazelton | 3 cfs | → |
| Rock Creek Near Buffalo | 70 cfs | → |
| Piney Creek At Kearny | 113 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Sullivan No. 2.
Track Sullivan No. 2 in the Snoflo app
Save this dam as a favorite and get the local NOAA / yr.no forecast plus regional flow context wherever you are.
About Sullivan No. 2
Where does the data for Sullivan No. 2 come from?
Structural and regulatory data come from the U.S. Army Corps of Engineers' National Inventory of Dams (NID). Weather forecast comes from NOAA / yr.no -- the same feed Snoflo's iOS app uses.
How often is the report updated?
NID structural data refreshes annually as the Corps publishes updated assessments. The weather forecast refreshes throughout the day.
What does the Low hazard rating mean?
The Corps of Engineers' hazard potential classification grades probable consequences if the dam fails: High = probable loss of human life; Significant = no probable loss of human life but possible economic loss / environmental damage; Low = no probable loss of human life, only minor economic / environmental losses. See the Dam Data Reference card above for the full definitions.
What's "% of normal"?
The current storage value compared to the historical average storage on this calendar day. 100% = right on average; values above 100% mean above-normal storage (wet year); values below mean below-normal (dry year or drought).
Can I get alerts when storage crosses a threshold?
Yes -- alerts are managed in the Snoflo iOS app. Favorite this dam, set a threshold, and you'll get a push the moment conditions cross.
Other water bodies near here
Snoflo-tracked reservoirs and dams within driving distance of Sullivan No. 2.