Sodus 4 S dam
Sodus 4 S
Sodus 4 S is a local government-owned structure located in Lyon, Minnesota, designed for roadway retention. This dam is regulated by the Minnesota Department of Natural Resources and is permitted, inspected, and enforced by state authorities. The dam sits on Meadow Creek-TR and is classified as a Buttress dam with a height of 33 feet and a length of 1000 feet. It has a storage capacity of 480 acre-feet and serves a drainage area of 2.2 square miles.
Despite its low hazard potential, Sodus 4 S has not been rated for its condition assessment. The last inspection took place in April 2019, with a frequency of once every 8 years. Emergency action plans, risk assessments, and inundation maps for the dam are not currently available. The structure does not have any associated locks or spillways, and its operations and maintenance are not funded or regulated by federal agencies. Sodus 4 S presents an essential piece of infrastructure in managing water resources in the area.
For water resource and climate enthusiasts, Sodus 4 S offers a fascinating case study in local dam management and regulation. With its unique design and purpose, this structure plays a crucial role in flood control and water retention in the region. Understanding the intricacies of its ownership, regulation, and maintenance provides valuable insights into the complexities of managing water infrastructure in a changing climate. As efforts continue to assess and improve the condition of Sodus 4 S, it serves as a reminder of the importance of sustainable water resource management for communities and ecosystems alike.
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 Sodus 4 S -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Redwood River Near Marshall | 23 cfs | → |
| Yellow Medicine River Near Granite Falls | 151 cfs | → |
| Redwood River Near Redwood Falls | 148 cfs | → |
| Minnesota River At Montevideo | 1,520 cfs | → |
| Flandreau Cr Above Flandreau Sd | 1 cfs | → |
| Minnesota River At Morton | 2,550 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Sodus 4 S.
Track Sodus 4 S 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 Sodus 4 S
Where does the data for Sodus 4 S 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 Sodus 4 S.