Donner Euer Valley dam
Donner Euer Valley
Donner Euer Valley is a privately owned dam located in Hobart Mills, California, along the Tr Sfk Prosser Creek. Constructed in 1966, this earth dam stands at a height of 21 feet and has a storage capacity of 80 acre-feet, primarily used for water supply. The dam also serves recreational purposes and covers a surface area of 16 acres, with a drainage area of 1.1 square miles.
Managed by the Natural Resources Conservation Service, Donner Euer Valley has a low hazard potential and is in satisfactory condition based on the last assessment conducted in September 2017. Despite its age, the dam undergoes regular inspections and meets state regulations for safety and maintenance. The dam's emergency action plan status, risk assessments, and flood inundation maps are currently unreported, suggesting a potential area for improvement in emergency preparedness and risk management protocols.
Located in Nevada County, California, Donner Euer Valley is situated within the San Francisco District and falls under the jurisdiction of the Department of Water Resources for dam safety. Its strategic location and historical significance in water resource management make it a notable structure for water resource and climate enthusiasts interested in understanding the role of dams in water supply and recreational activities in the region.
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 Donner Euer Valley -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Donner C A Donner Lk Nr Truckee Ca | 9 cfs | → |
| Donner C At Hwy 89 Nr Truckee Ca | 53 cfs | → |
| Sagehen C Nr Truckee Ca | 9 cfs | → |
| Independence C Nr Truckee Ca | 19 cfs | → |
| Truckee R Nr Truckee Ca | 438 cfs | → |
| Prosser C Bl Prosser C Dam Nr Truckee Ca | 72 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Donner Euer Valley.
Boat launches
- Prosser Lake Reservoir
- Capt Roberts Boating Site
- Meadow Lake Road Nevada County
- Woodcamp Access Road Nevada County
- Henness Pass Road, Sierraville
- Lake Spaulding Road 10260, Nevada City
Campgrounds
- Iron Throne Campsite (2 Tents)
- First Campsite On The Left (3-4 Tents)
- Lakeside Balcony Campsite (1 Tent)
- Hillside Campsite (2-3 Tents)
- Granite Campsite (1-2 Tents)
- Wooded Campsite (4 Tents)
Fishing spots
Track Donner Euer Valley 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 Donner Euer Valley
Where does the data for Donner Euer Valley 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 Donner Euer Valley.