Upper Delta Basin Enlargement dam
Upper Delta Basin Enlargement
The Upper Delta Basin Enlargement, also known as No. 1 Tailings, is a privately owned earth dam located in Green River, Wyoming. Completed in 2013, this structure serves the primary purpose of storing tailings material, with a maximum storage capacity of 9992 acre-feet and a structural height of 40 feet. The dam has a fair condition assessment and a high hazard potential, requiring regular inspections to ensure safety.
Managed by the State of Wyoming and regulated by the SEO, the Upper Delta Basin Enlargement plays a crucial role in the management of water resources in the area. Situated along the Green River, it covers a surface area of 652 acres and has a drainage area of 0 acres. Despite its fair condition, the dam is equipped with outlet gates for controlled release of water and a spillway type that is not specified in the data.
Owned by a private entity and designed by Phillip Solseng, the Upper Delta Basin Enlargement is a significant infrastructure project in the region. With a history of inspections and maintenance, this dam continues to contribute to water management efforts in Sweetwater County, Wyoming. As climate change impacts water resources, structures like the Upper Delta Basin Enlargement become essential for ensuring water security and mitigating potential risks.
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 Upper Delta Basin Enlargement -- 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 Upper Delta Basin Enlargement.
Boat launches
- Stratton Meyer Boatramp Road Green River
- Slate Creek Campground Boat Launch
- Weeping Rock Campground Boat Launch
- Tail Race Campground Boat Launch
Track Upper Delta Basin Enlargement 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 Upper Delta Basin Enlargement
Where does the data for Upper Delta Basin Enlargement 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 High 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 Upper Delta Basin Enlargement.