Simon Dam dam
Simon Dam
Simon Dam, located in Riverside, Iowa, is a privately owned earth dam completed in 2006 for fire protection, stock, or small fish pond purposes. The dam stands at a height of 31 feet and has a length of 537 feet, with a storage capacity of 65 acre-feet. Situated on the TR-English River, the dam is regulated by the Iowa Department of Natural Resources and is inspected, permitted, and enforced by state authorities. With a low hazard potential and a moderate risk assessment rating, Simon Dam plays a crucial role in water resource management in Washington County.
Managed by the Rock Island District of the US Army Corps of Engineers, Simon Dam serves as a vital infrastructure for water control and conservation in the region. Despite not being federally owned or funded, the dam plays a significant role in mitigating flood risks and ensuring water availability for various uses. The dam's uncontrolled spillway, soil foundation, and strategic location make it a key player in the local ecosystem and a valuable asset for climate resilience efforts in the area.
With a surface area of 5.3 acres and a drainage area of 0.17 square miles, Simon Dam is a notable structure that contributes to water storage and management in the region. While its condition assessment is currently not rated, the dam's operational effectiveness and low hazard potential highlight its importance for water resource enthusiasts and climate advocates alike. As a privately owned facility with state regulatory oversight, Simon Dam exemplifies the collaborative efforts needed to address water challenges and adapt to changing climate conditions in Iowa.
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 Simon Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Iowa River Near Lone Tree | 3,230 cfs | → |
| English River At Kalona | 228 cfs | → |
| Old Mans Creek Near Iowa City | 118 cfs | → |
| Iowa River At Iowa City | 2,160 cfs | → |
| Cedar River Near Conesville | 6,160 cfs | → |
| Clear Creek Near Coralville | 29 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Simon Dam.
Boat launches
- Riverside Road Riverside
- Sand Road Southeast Johnson County
- Vine Avenue Washington County
- 520th Street Southeast Johnson County
- Mehaffey Bridge Road Northeast , 52333 Iowa
- Dogwood Avenue Washington County
Campgrounds
- River Junction Access
- Hills Access
- Marr Park
- Crooked Creek Christian Camp
- Louisa County Fairgrounds
- Brinton Timber
More reservoirs
Track Simon 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 Simon Dam
Where does the data for Simon 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 Simon Dam.