Upper Little Nemaha 5 dam
Upper Little Nemaha 5
Located in Unadilla, Nebraska, Upper Little Nemaha 5 is a local government-owned earth dam designed for flood risk reduction on the TR-Hooper Creek. Completed in 1996, this structure stands at a height of 48 feet and spans 1190 feet, offering storage capacity of 2035 acre-feet. With a significant hazard potential, Upper Little Nemaha 5 has a satisfactory condition assessment as of March 2020 and is regularly inspected by the Nebraska Department of Natural Resources.
The dam's primary purpose is flood risk reduction, serving the community by safeguarding against potential inundation events. With a drainage area of 7.4 square miles and a maximum discharge capacity of 3851 cubic feet per second, Upper Little Nemaha 5 plays a crucial role in managing water flow and protecting downstream areas from flooding. Its location in Otoe County, Nebraska, underscores the importance of this structure in mitigating flood risks and ensuring the safety of surrounding communities.
As a key component of the flood management infrastructure in the region, Upper Little Nemaha 5 is subject to state regulation, inspection, and enforcement by the Nebraska Department of Natural Resources. Its earth core and stone foundation contribute to its structural integrity, while the dam's satisfactory condition assessment indicates that it is well-maintained and operational. With a focus on flood risk reduction and a commitment to protecting the local area from potential inundation, Upper Little Nemaha 5 stands as a vital asset in the ongoing efforts to manage water resources and climate challenges 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 Upper Little Nemaha 5 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Stevens Creek Nr. Lincoln | 11 cfs | → |
| Salt Creek At 70th St. At Lincoln | 267 cfs | → |
| Salt Creek At Greenwood | 246 cfs | → |
| Salt Creek At Lincoln | 134 cfs | → |
| Salt Creek At Roca | 6 cfs | → |
| Salt Creek At Pioneers Blvd At Lincoln | 11 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Upper Little Nemaha 5.
Track Upper Little Nemaha 5 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 Upper Little Nemaha 5
Where does the data for Upper Little Nemaha 5 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 Upper Little Nemaha 5.