Herzog Dam dam
Herzog Dam
Herzog Dam, also known as Tongue River WS Dam T3-6, is a local government-owned structure in Pembina, North Dakota, designed by the USDA NRCS. Completed in 1957, this earth dam stands at a height of 38 feet with a structural height of 46 feet and a length of 794 feet. It serves the primary purpose of flood risk reduction along the Tongue River-TR, with a normal storage capacity of 80 acre-feet and a maximum storage of 2,430 acre-feet. The dam features an uncontrolled spillway with a width of 450 feet and a single slide (sluice gate) outlet gate.
Given its location in a significant hazard potential area, Herzog Dam has undergone a structural modification in 1985 to enhance its resilience. The dam is under the regulatory oversight of the North Dakota State Water Commission (NDSWC), ensuring regular inspections, permitting, and enforcement to maintain its safety and functionality. Although the condition assessment is not rated, the risk assessment categorizes the dam's risk level as moderate, indicating the need for ongoing risk management measures. While no Emergency Action Plan (EAP) details are provided, the dam's emergency preparedness and communication protocols are critical for effective response in case of potential inundation events. This dam serves as a vital infrastructure for flood control and water resource management in the region, highlighting the importance of sustainable dam operations and maintenance for climate resilience.
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 Herzog Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Tongue River At Akra | 0 cfs | → |
| Little South Pembina River Nr Walhalla | 15 cfs | → |
| Pembina River At Walhalla | 699 cfs | → |
| Pembina River At Neche | 855 cfs | → |
| Park River At Grafton | 56 cfs | → |
| Red River Of The North At Drayton | 3,330 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Herzog Dam.
Track Herzog 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 Herzog Dam
Where does the data for Herzog 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 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 Herzog Dam.