Magleby dam
Magleby
Magleby is a privately owned dam located in Sevier County, Utah, along Monroe Creek. Completed in 1915, this Earth-type dam serves primarily for irrigation purposes, with a storage capacity of 80 acre-feet. The dam stands at a structural height of 18 feet, with a hydraulic height of 16 feet, and a length of 305 feet. Despite not having a hazard potential rating or condition assessment, the Utah Division of Water Rights regulates and inspects Magleby regularly to ensure its safety and compliance.
Situated in the city of Greenwich, Magleby is a significant water resource in the region, supporting agricultural activities and water distribution. Being state-regulated and permitted, the dam undergoes inspections every two years, with the last one conducted in July 2020. Its location within the Los Angeles District and under the jurisdiction of the Utah Division of Water Rights highlights the importance of maintaining its structural integrity and functionality to meet the irrigation needs of the area.
With its historical significance dating back over a century, Magleby continues to play a vital role in the water management infrastructure of Sevier County, Utah. As a key component for irrigation purposes, the dam contributes to the sustainability of agricultural practices in the region. Regular inspections and state oversight ensure the safety and reliability of Magleby, reinforcing its importance in water resource management and climate resilience efforts in the area.
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 Magleby -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Clear Creek Above Diversions | 26 cfs | → |
| Seven Mile Creek Near Fish Lake | 6 cfs | → |
| East Fork Sevier River Near Kingston | 198 cfs | → |
| Sevier River Near Kingston | 8 cfs | → |
| Fremont River Near Bicknell | 54 cfs | → |
| Salina Creek Near Emery | 4 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Magleby.
Campgrounds
- Milo's Kitchen Trailhead
- Big Lake Cua Dispersed
- Koosharem Canyon/Paiute Atv
- Upper Box Creek Trailhead
- Manning Meadow Cua Dispersed
- Koosharem Reservoir Dispersed Camping
Fishing spots
- Manning Meadows Cua Dispersed
- Lakeside Fish Cleaning Station Cua Dispersed
- Joe Bush Fisherman Parking Rec Site
- Rex Reservoir
- Johnson Reservoir Rec Site
- Gates Lake
Track Magleby 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 Magleby
Where does the data for Magleby 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 Significant 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 Magleby.