Glendo dam
Glendo
Glendo is a federal-owned dam located on the North Platte River in Wyoming, specifically in Casso, Platte County. This Earth dam, completed in 1958 by the Bureau of Reclamation, stands at a structural height of 190 feet and serves multiple purposes including flood risk reduction, fish and wildlife pond creation, hydroelectric power generation, irrigation, and recreation. With a hydraulic height of 145 feet and a storage capacity of over 1 million acre-feet, Glendo plays a crucial role in managing water resources in the region.
The dam has a controlled spillway with a width of 45 feet and a surface area of 23,320 acres. It is regulated by the Bureau of Reclamation and undergoes regular inspections and maintenance to ensure its structural integrity and operational efficiency. In 2016, the dam underwent structural modifications to enhance its performance. Despite its high hazard potential, Glendo is considered to have a very high risk assessment level, indicating the importance of effective risk management measures. Overall, Glendo is a key infrastructure for water resource management and climate resilience in Wyoming.
With its strategic location on the North Platte River and its significant storage capacity, Glendo Dam plays a vital role in flood risk reduction and water resource management in the region. Owned and operated by the Bureau of Reclamation, the dam not only serves practical purposes such as irrigation and hydroelectric power generation but also provides opportunities for recreation and wildlife conservation. As a critical piece of infrastructure, Glendo Dam is subject to regular inspections and maintenance to ensure its functionality and safety, highlighting its importance in maintaining water security and climate resilience in Wyoming.
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 Glendo -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| North Platte River Below Glendo Reservoir | 5,710 cfs | → |
| North Platte River At Orin | 392 cfs | → |
| North Platte River Below Whalen Diversion Dam | · | → |
| Laramie River Near Fort Laramie | 41 cfs | → |
| Sybille Creek Ab Canal No. 3 | 93 cfs | → |
| Sybille Creek Ab Mule Creek | 143 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Glendo.
Campgrounds
- Glendo State Park
- Guernsey State Park
- Larson Park
- Esterbrook Campground
- Esterbrook
- Lost Springs City Park
Fishing spots
- Glendo Reservoir
- Guernsey Reservoir
- Grayrocks Reservoir
- Wheatland Reservoir #1
- Rock Lake
- Toltec Reservoir
More reservoirs
Track Glendo 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 Glendo
Where does the data for Glendo 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 Glendo.