66 Pastures dam
66 Pastures
66 Pastures is a privately-owned irrigation dam located in Goshen County, Wyoming, along the Horse Creek Offstream. Built in 1910, this earth dam stands at a height of 16 feet and has a capacity of 1141 acre-feet for storing water for irrigation purposes. With a surface area of 82 acres and a drainage area of 0, the dam has a spillway width of 14 feet and is equipped with a valve outlet gate.
Despite its age, the dam at 66 Pastures is in fair condition, with a low hazard potential. Regular inspections have been conducted, with the last assessment performed in May 2017. The dam's risk assessment is classified as moderate, indicating the need for ongoing risk management measures. The surrounding area is represented by Liz Cheney, a Republican member of Congress from Wyoming.
Water resource and climate enthusiasts will appreciate the historical significance and functional importance of 66 Pastures in sustaining agricultural activities in the region. As a key infrastructure for irrigation, this dam plays a vital role in supporting local farming operations and ensuring water availability for crops. The dam's design and construction reflect early 20th-century engineering practices, highlighting the ingenuity and resourcefulness of past generations in harnessing water resources for agricultural development.
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 66 Pastures -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| North Platte River At Wyoming-Nebraska State Line | 193 cfs | → |
| Lodgepole Creek At Bushnell | 0 cfs | → |
| Laramie River Near Fort Laramie | 24 cfs | → |
| North Platte River Below Whalen Diversion Dam | 1,860 cfs | → |
| Crow Creek At 19th Street | 3 cfs | → |
| Sybille Creek Ab Canal No. 3 | 93 cfs | → |
About 66 Pastures
Where does the data for 66 Pastures 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 below 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.
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.