Upper Little Nemaha 42 dam
Upper Little Nemaha 42
Upper Little Nemaha 42 is a local government-owned dam located in UNADILLA, Nebraska, along the RUSSELL CREEK. Constructed in 2000 for flood risk reduction, this earth dam stands at 39 feet high and has a storage capacity of 941 acre-feet, with a normal storage of 146 acre-feet. With a low hazard potential and satisfactory condition assessment as of May 2016, the dam is under the regulatory oversight of the Nebraska Department of Natural Resources.
The dam's primary purpose of flood risk reduction serves the surrounding Otoe County community by mitigating the impact of potential flooding events. Its earth core and stone foundation provide structural stability to handle a maximum discharge of 1522 CFS. The dam's location within Congressional District 01, Nebraska, under the oversight of Representative Jeff Fortenberry (R), highlights the importance of water resource management in the region.
Despite having no associated structures, Upper Little Nemaha 42 plays a vital role in protecting the area from potential flooding risks. With regular inspections and enforcement measures in place, the dam ensures the safety and well-being of the local community. Its presence contributes to the overall water resource management efforts in Nebraska, showcasing the importance of climate resilience and preparedness in the face of increasing environmental challenges.
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 42 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Salt Creek At Roca | 6 cfs | → |
| Stevens Creek Nr. Lincoln | 11 cfs | → |
| Salt Creek At Pioneers Blvd At Lincoln | 11 cfs | → |
| Salt Creek At 70th St. At Lincoln | 267 cfs | → |
| Salt Creek At Lincoln | 134 cfs | → |
| Salt Creek At Greenwood | 246 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Upper Little Nemaha 42.
Track Upper Little Nemaha 42 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 42
Where does the data for Upper Little Nemaha 42 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 Upper Little Nemaha 42.