No. 3 Tailings dam
No. 3 Tailings
No. 3 Tailings, located in Green River, Wyoming, is a privately owned tailings dam designed by Wayne L. Johnson and regulated by the Wyoming State Engineer's Office. Completed in 1980, this earth dam stands at a height of 19 feet and has a storage capacity of 140 acre-feet. The dam, constructed on the Left Fork Stevens Draw, serves the primary purpose of storing tailings and has a low hazard potential with fair condition assessment.
Despite its low hazard potential, No. 3 Tailings poses a high risk due to its location and potential impact on the surrounding area. The dam has a drainage area of 0.1 square miles and a maximum discharge of 5 cubic feet per second. With a surface area of 14 acres and a length of 650 feet, the dam is inspected every 5 years to ensure its structural integrity and safety. While it currently meets guidelines and has adequate emergency contacts, there is room for improvement in risk management measures and the development of inundation maps.
As water resource and climate enthusiasts monitor the condition of No. 3 Tailings, it is crucial to stay informed about any updates or changes to its risk assessment and emergency action plan. With its proximity to the Left Fork Stevens Draw and the potential implications of a dam failure, continued vigilance and maintenance of this structure are essential to mitigating risks and ensuring the safety of the community and environment.
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 No. 3 Tailings -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Blacks Fork Near Little America | 60 cfs | → |
| Green River Near Green River | 493 cfs | → |
| Green River Below Fontenelle Reservoir | 626 cfs | → |
| Pacific Creek Near Farson | 3 cfs | → |
| Green River Near La Barge | 2,340 cfs | → |
| Big Sandy River Near Farson | 256 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near No. 3 Tailings.
Boat launches
- Stratton Meyer Boatramp Road Green River
- Slate Creek Campground Boat Launch
- Weeping Rock Campground Boat Launch
- Tail Race Campground Boat Launch
Track No. 3 Tailings 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 No. 3 Tailings
Where does the data for No. 3 Tailings 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 No. 3 Tailings.