Lum Hollow Subwatershed M-13210 dam
Lum Hollow Subwatershed M-13210
Lum Hollow Subwatershed M-13210 is a small earth dam located in Woodbury County, Iowa, near the Missouri River. Built in 1959 by the USDA NRCS, this dam serves multiple purposes including fire protection, stock watering, and small fish pond management. With a dam height of 26 feet and a storage capacity of 68 acre-feet, this structure plays a significant role in flood risk reduction within the Lum Hollow Creek watershed.
Despite its relatively low hazard potential, Lum Hollow Subwatershed M-13210 is regulated by the Iowa DNR and undergoes regular state inspections to ensure its structural integrity and functionality. The dam has a drainage area of 3.35 square miles and a surface area of 2.5 acres, making it an essential component of the local water resource management system. While the dam's condition assessment is currently listed as "not rated," its risk assessment indicates a moderate level of risk, highlighting the importance of ongoing monitoring and maintenance efforts.
Overall, Lum Hollow Subwatershed M-13210 serves as a vital water management structure in the region, providing essential services for both agricultural and environmental purposes. With its connection to the Lum Hollow Creek and proximity to the Missouri River, this dam plays a crucial role in mitigating flood risks and supporting the overall health of the local ecosystem. As climate change continues to impact water resources, structures like Lum Hollow Subwatershed M-13210 will play an increasingly important role in sustainable water management practices.
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 Lum Hollow Subwatershed M-13210 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| West Fork Ditch At Hornick | 80 cfs | → |
| Maple River At Mapleton | 264 cfs | → |
| Little Sioux River At Correctionville | 1,400 cfs | → |
| Monona-Harrison Ditch Near Turin | 187 cfs | → |
| Little Sioux River Near Turin | 1,680 cfs | → |
| Missouri River At Decatur | 26,300 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Lum Hollow Subwatershed M-13210.
Boat launches
Campgrounds
Track Lum Hollow Subwatershed M-13210 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 Lum Hollow Subwatershed M-13210
Where does the data for Lum Hollow Subwatershed M-13210 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 Lum Hollow Subwatershed M-13210.