Hanlontown Slough Site 3 dam
Hanlontown Slough Site 3
Hanlontown Slough Site 3, located in Worth County, Iowa, is a Federal-owned Fish and Wildlife Pond managed by the NRCS. The site, completed in 2000, serves as a crucial habitat for local wildlife, with a normal storage capacity of 121 acre-feet and a surface area of 96.5 acres. While the dam is of Earth type and has a height of 8 feet, it is considered to have a low hazard potential and is currently not rated for condition assessment.
With a drainage area of 5.3 square miles and being regulated by the Iowa DNR, Hanlontown Slough Site 3 plays a vital role in managing water resources in the region. The dam's uncontrolled spillway type and stone core make it a sustainable structure for maintaining water levels and supporting biodiversity. Despite its moderate risk assessment, the site has not been inspected recently and lacks an Emergency Action Plan, highlighting the need for continued monitoring and maintenance to ensure its long-term functionality.
Located near the TR-Willow Creek, this site is a valuable asset for conservation efforts in the area, providing a safe haven for various species of wildlife. As climate change continues to impact water resources, the importance of sites like Hanlontown Slough Site 3 in preserving ecosystems and supporting biodiversity becomes increasingly evident. It is essential for stakeholders to prioritize regular inspections and risk management measures to guarantee the sustainability and effectiveness of this critical water resource 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 Hanlontown Slough Site 3 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Winnebago River At Mason City | 501 cfs | → |
| Cedar River Near Austin | 173 cfs | → |
| Cedar River At Charles City | 627 cfs | → |
| Iowa River Near Rowan | 364 cfs | → |
| Little Cedar River Near Ionia | 159 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Hanlontown Slough Site 3.
Boat launches
- Finch Avenue Worth County
- Worth County
- Winnebago County
- Main Avenue Clear Lake
- Nelson Street Cerro Gordo County
Track Hanlontown Slough Site 3 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 Hanlontown Slough Site 3
Where does the data for Hanlontown Slough Site 3 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 Hanlontown Slough Site 3.