2008 Hartmann Dam dam
2008 Hartmann Dam
The 2008 Hartmann Dam, located in Johnson, Nebraska, is a private dam constructed in 2008 for purposes of flood risk reduction and other water resource management activities. This Earth-type dam stands at a height of 25 feet with a hydraulic height of 22.9 feet, providing a vital structure in the management of the TR-SAMPSON BR TURKEY CREEK waterway. With a storage capacity of 92 acre-feet and a normal storage level of 34 acre-feet, the dam covers a surface area of 4.9 acres and serves a drainage area of 0.3 square miles.
Managed by the Nebraska Department of Natural Resources, the 2008 Hartmann Dam has a low hazard potential and is rated to be in satisfactory condition as of the last inspection conducted in June 2016. The dam's emergency action plan and risk management measures are currently under evaluation, showcasing a commitment to ensuring the safety and efficiency of this essential water management infrastructure. With a Congressional representative of Adrian Smith (R), the dam plays a crucial role in the overall water resource management strategy in Congressional District 03, Nebraska.
As a key component in the water resource infrastructure of the region, the 2008 Hartmann Dam serves as a vital tool in flood risk reduction and water resource management for the local community. With its low hazard potential and satisfactory condition, the dam stands as a reliable structure in ensuring the safety and security of the surrounding area. With continued inspection and maintenance, the dam remains poised to play a critical role in preserving the water resources and climate resilience of Johnson, Nebraska, for years to come.
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 2008 Hartmann Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Big Blue R At Barneston Nebr | 2,280 cfs | → |
| North Fork Big Nemaha River At Humboldt | 850 cfs | → |
| Turkey C Nr Seneca | 147 cfs | → |
| Little Nemaha River At Auburn | 743 cfs | → |
| Turkey Creek Near De Witt | 195 cfs | → |
| Salt Creek At Roca | 6 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near 2008 Hartmann Dam.
Boat launches
- Burchard Lake Wma
- Wirth Brothers
- Wolf - Wildcat
- Rockford Lake Sra
- Bear Pierce Lake 2a
- Kirkmans Cove Lake
Track 2008 Hartmann Dam 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 2008 Hartmann Dam
Where does the data for 2008 Hartmann Dam 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 2008 Hartmann Dam.