Grundle Dam dam
Grundle Dam
Grundle Dam, located in Fremont County, Iowa, is a private-owned structure designed by USDA NRCS with a primary purpose of providing fire protection, stock, or a small fish pond. Completed in 1962, this earth dam stands at a height of 38 feet and has a storage capacity of 41 acre-feet. Situated on TR-COON CREEK, the dam serves to regulate water flow in the area and offers low hazard potential with a moderate risk assessment rating.
Managed by the Iowa DNR, Grundle Dam is a state-regulated and inspected facility with a spillway type of "Uncontrolled." Although not currently rated for its condition, the dam has not undergone any recent modifications and is considered to have a low risk potential for failure. With its strategic location and purposeful design, Grundle Dam plays a vital role in water resource management and contributes to the overall environmental sustainability of the region. For water resource and climate enthusiasts, Grundle Dam serves as an important example of private ownership and state regulation in ensuring the safety and efficiency of 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 Grundle Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| West Nishnabotna River At Randolph | 693 cfs | → |
| Nishnabotna River Above Hamburg | 1,550 cfs | → |
| Missouri River At Nebraska City | 33,200 cfs | → |
| Weeping Water Creek At Union | 17 cfs | → |
| East Nishnabotna River At Red Oak | 588 cfs | → |
| Little Nemaha River At Auburn | 102 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Grundle Dam.
Boat launches
- Riverview Boat Ramp
- Us 34;Us 275 Mills County
- Plattsmouth Boat Ramp
- Mills County
- I 29;Us 275 Mills County
- Peru Boat Ramp
Campgrounds
- Waubonsie State Park Campground
- Waubonsie State Park
- Pierce Creek Rec Area
- Riverview Marina State Rec Area
- Victorian Acres Campground
- Camp Woodmen
More reservoirs
Track Grundle 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 Grundle Dam
Where does the data for Grundle 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 Grundle Dam.