Grand Forks Co. Com. #1 dam
Grand Forks Co. Com. #1
Grand Forks Co. Com. #1, also known as Hemmingson Dam, is a local government-owned structure located in Grand Forks, North Dakota. This earth-type dam, completed in 1936, serves as a critical resource for managing the South Branch Turtle River. With a height of 25 feet and a storage capacity of 225 acre-feet, the dam plays a crucial role in regulating water flow and maintaining the surrounding ecosystem.
Despite its age, Grand Forks Co. Com. #1 has undergone structural modifications in 1989 and 2000 to ensure its continued functionality. The dam has a low hazard potential and has not been rated for its current condition. However, it is regulated and inspected by the North Dakota State Water Commission, demonstrating the commitment to safety and compliance with state regulations. The risk assessment for this dam is moderate, indicating a proactive approach to risk management and maintenance.
Although Grand Forks Co. Com. #1 does not have outlet gates or locks, it is equipped with an uncontrolled spillway. This dam is an integral part of the local water infrastructure, serving a primary purpose of "other" and supporting a drainage area of 3.4 square miles. With its historical significance and ongoing regulatory oversight, this dam exemplifies the intersection of water resource management and climate resilience in North Dakota.
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 Grand Forks Co. Com. #1 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Turtle River At Turtle R State Park Nr Arvilla | 25 cfs | → |
| Forest River Nr Fordville | 89 cfs | → |
| Forest River At Minto | 132 cfs | → |
| Goose River Near Portland | 8 cfs | → |
| Red River Of The North At Grand Forks | 2,280 cfs | → |
| Sheyenne River Nr Cooperstown | 435 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Grand Forks Co. Com. #1.
Boat launches
- Larimore Dam
- 35th Avenue Northeast Grand Forks County
- County Road 14 Walsh County
- Whitman Dam
- County Road 35 Mcville
- State Highway 15 Mcville
Track Grand Forks Co. Com. #1 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 Grand Forks Co. Com. #1
Where does the data for Grand Forks Co. Com. #1 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 Grand Forks Co. Com. #1.