Floyd dam
Floyd
Floyd is a privately owned earth dam in Campbell County, Wyoming, with a primary purpose of irrigation. Built in 1950 by designer Hugh Lowham, the dam stands at 25 feet high and spans a length of 1063 feet along Prairie Dog Creek. It has a storage capacity of 94 acre-feet and serves multiple purposes including fire protection, stock watering, and small fish ponds.
Despite its low hazard potential and fair condition assessment, Floyd's risk level is moderate. The dam has an uncontrolled spillway with a width of 185 feet and an outlet gate with a single valve. Located in an unnamed ranch in Wyoming, Floyd's emergency action plan status and inundation maps are currently unknown. The last inspection in 2018 showed that the dam was meeting regulatory standards, but its risk management measures and risk characterization are unspecified.
For water resource and climate enthusiasts, Floyd presents an intriguing case study of a mid-century earth dam serving diverse agricultural needs in a rural setting. With its location in the Omaha District and proximity to Congressional District 00 in Wyoming, the dam's historical significance and ongoing regulatory oversight offer valuable insights into the intersection of water management, infrastructure resilience, and environmental stewardship. As Floyd continues to fulfill its role in sustaining local water resources, monitoring its risk profile and emergency preparedness will be critical for ensuring the long-term safety and sustainability of this vital irrigation structure.
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 Floyd -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Stonepile Creek At Mouth | 3 cfs | → |
| Donkey Creek Near Gillette | 0 cfs | → |
| Wild Horse Creek Near Arvada | 0 cfs | → |
| Powder River At Arvada | 84 cfs | → |
| Belle Fourche R Bl Rattlesnake C Nr Piney Wy | 0 cfs | → |
| Clear Creek Near Arvada | 256 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Floyd.
More reservoirs
Track Floyd 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 Floyd
Where does the data for Floyd 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 Floyd.