Union Grove Silt Containment Dam dam
Union Grove Silt Containment Dam
The Union Grove Silt Containment Dam, located in Garwin, Iowa, serves as a critical structure for debris control along the TR-Union Grove Lake. Completed in 1990, this earth dam stands at a height of 17 feet and spans 720 feet in length, with a storage capacity of 249 acre-feet. Managed by the Iowa Department of Natural Resources, the dam is regulated, permitted, inspected, and enforced by the state, ensuring its safety and functionality for water resource management.
With a low hazard potential and a moderate risk assessment rating, the Union Grove Silt Containment Dam plays a vital role in protecting the surrounding area from potential flooding and sediment buildup. Although the dam's condition is currently not rated, its design and construction meet industry standards for debris control purposes. As an essential part of Iowa's water infrastructure, the dam contributes to environmental conservation efforts and helps maintain the integrity of the TR-Union Grove Lake ecosystem.
For water resource and climate enthusiasts, the Union Grove Silt Containment Dam stands as a testament to the importance of sustainable water management practices. As an earth dam with a focus on debris control, it showcases the state's commitment to preserving natural habitats and protecting communities from the impacts of extreme weather events. By staying informed about the dam's operations and maintenance, enthusiasts can contribute to ongoing efforts to safeguard Iowa's water resources for future generations.
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 Union Grove Silt Containment Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Iowa River At Marshalltown | 768 cfs | → |
| Timber Creek Near Marshalltown | 88 cfs | → |
| Richland Creek Near Haven | 34 cfs | → |
| Wolf Creek Near Dysart | 261 cfs | → |
| Black Hawk Creek At Hudson | 191 cfs | → |
| Salt Creek Near Elberon | 131 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Union Grove Silt Containment Dam.
Boat launches
- Bb Avenue Tama County
- Richards Drive 2165, Tama County
- C Avenue Tama County
- Atv Trail Tama
- Marsh Avenue Marshall County
- P Avenue Tama County
Track Union Grove Silt Containment 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 Union Grove Silt Containment Dam
Where does the data for Union Grove Silt Containment 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 Union Grove Silt Containment Dam.