Long Branch 3 dam
Long Branch 3
Located in Johnson County, Nebraska, Long Branch 3 is a crucial flood risk reduction structure designed by ASSOCIATE ENGINEERS INC. HOTTOVY DIVISION and USDA-NRCS in 1980. This earth dam, standing at 32 feet tall with a hydraulic height of 29 feet, serves the primary purpose of flood risk reduction for the TR-LONG BRANCH river or stream. With a storage capacity of 270 acre-feet and a drainage area of 1.2 square miles, Long Branch 3 plays a pivotal role in safeguarding the surrounding area from potential flooding events.
Managed by the local government and regulated by the Nebraska Department of Natural Resources, Long Branch 3 has been deemed to be in satisfactory condition as of the last inspection in May 2016. With a normal storage capacity of 70 acre-feet and a maximum discharge of 430 cubic feet per second, this structure covers a surface area of 13 acres and spans a length of 817 feet. Although no spillway type or width is specified, the dam's core consists of stone with a soil foundation, ensuring its stability and resilience in the face of varying water levels and pressures.
As part of the Omaha District under the US Army Corps of Engineers, Long Branch 3 stands as a testament to effective water resource management and climate adaptation strategies. Its strategic location, robust design, and efficient operation highlight the importance of proactive measures in mitigating flood risks and protecting communities and ecosystems in the region. For water resource and climate enthusiasts, Long Branch 3 serves as a shining example of successful collaboration between government agencies, designers, and local stakeholders in ensuring the resilience and sustainability of vital water infrastructure.
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 Long Branch 3 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| North Fork Big Nemaha River At Humboldt | 850 cfs | → |
| Little Nemaha River At Auburn | 743 cfs | → |
| Turkey C Nr Seneca | 147 cfs | → |
| Missouri River At Nebraska City | 37,500 cfs | → |
| Big Blue R At Barneston Nebr | 2,280 cfs | → |
| Big Nemaha River At Falls City | 1,470 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Long Branch 3.
Track Long Branch 3 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 Long Branch 3
Where does the data for Long Branch 3 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 Hazard 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 Long Branch 3.