Mill Picayune Watershed Site N-28-1 dam
Mill Picayune Watershed Site N-28-1
Located in Shelby, Iowa, the Mill Picayune Watershed Site N-28-1 is a key resource managed by the local government for fire protection, stock, and small fish pond purposes. With a dam height of 38 feet and a length of 710 feet, this earth-type structure was completed in 1972 and boasts a storage capacity of 84 acre-feet, serving as a vital component for flood risk reduction in the area. Situated along the TR-North Picayune Creek, this site covers a drainage area of 0.24 square miles and has a surface area of 4.2 acres, making it an essential part of the region's water management infrastructure.
Managed by the Iowa Department of Natural Resources, the Mill Picayune Watershed Site N-28-1 is subject to state regulation, inspection, and enforcement, ensuring its safety and efficacy for the surrounding community. Despite being classified as having a low hazard potential, the site is rated as moderate risk (3), emphasizing the importance of ongoing monitoring and risk management measures. While the dam has not been assessed for condition, its role in water resource management and emergency response planning highlights the need for continued attention and upkeep to safeguard the local environment and population.
With its strategic location and essential functions, the Mill Picayune Watershed Site N-28-1 plays a crucial role in the water resource management infrastructure of Shelby, Iowa. Designed by the USDA NRCS and maintained by the local government, this site not only provides critical water storage for fire protection and stock purposes but also contributes to flood risk reduction efforts in the region. As part of the broader network of water management structures along the TR-North Picayune Creek, this site underscores the importance of proactive monitoring, maintenance, and risk assessment to ensure the safety and resilience of the community in the face of changing climate patterns and water resource challenges.
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 Mill Picayune Watershed Site N-28-1 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Boyer River At Logan | 484 cfs | → |
| Soldier River At Pisgah | 151 cfs | → |
| Little Sioux River Near Turin | 1,870 cfs | → |
| Monona-Harrison Ditch Near Turin | 330 cfs | → |
| Maple River At Mapleton | 337 cfs | → |
| West Nishnabotna River At Hancock | 318 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Mill Picayune Watershed Site N-28-1.
Track Mill Picayune Watershed Site N-28-1 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 Mill Picayune Watershed Site N-28-1
Where does the data for Mill Picayune Watershed Site N-28-1 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 Mill Picayune Watershed Site N-28-1.