Randolph County Lake Dam dam
Randolph County Lake Dam
Randolph County Lake Dam, located in Randolph County, Illinois, was completed in 1960 and stands at a height of 47 feet. The dam's primary purpose is for recreation, with a normal storage capacity of 946 acre-feet and a maximum storage of 1563 acre-feet. The dam, constructed of earth with a buttress core type, spans a length of 665 feet and has an uncontrolled spillway with a width of 263 feet.
Managed by the Illinois Department of Natural Resources (IDNR), Randolph County Lake Dam is state-regulated, inspected, and enforced to ensure its safety and compliance with regulatory standards. The dam poses a significant hazard potential, with a moderate risk assessment score of 3. Despite its age, the condition assessment of the dam is currently listed as not available, indicating a need for further evaluation and potentially the development of an Emergency Action Plan (EAP) to address any safety concerns.
Surrounded by the scenic Morrison Branch river/stream, Randolph County Lake Dam provides a picturesque setting for outdoor enthusiasts and water resource enthusiasts alike. With its recreational focus, the dam offers opportunities for fishing, boating, and other water-based activities in a tranquil natural environment. As climate and water resource enthusiasts, it is essential to monitor and support the proper maintenance and management of dams like Randolph County Lake Dam to ensure their continued safety and functionality for future generations to enjoy.
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 Randolph County Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Mississippi River At Chester | 234,000 cfs | → |
| South Fork Saline Creek Near Perryville | 22 cfs | → |
| Kaskaskia River At New Athens | 6,750 cfs | → |
| Richland Creek Near Hecker | 50 cfs | → |
| Big Muddy River At Rte 127 At Murphysboro | 387 cfs | → |
| Silver Creek Near Freeburg | 87 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Randolph County Lake Dam.
Boat launches
- Water Street Chester
- Phegley Resort Lane Randolph County
- Randolph County
- Il 151 Jackson County
- Johnson Creek Road Jackson County
- Il 13 New Athens
Campgrounds
- Randolph County State Conservation Area
- Fort Kaskaskia State Park
- Johnson Creek
- Johnson Creek Campground
- Pyramid State Park
- Hawn State Park
Paddle runs
- 1/2 Mile Downstream Of Confluence With Kinkaid Creek To Confluence With Mississippi River, Approx 4 Miles South Of Grand Tower, Il
- 1 Mile West Of Alto Pass, Il To 1/2 Mile South Of Confluence With Clear Creek, West Of Trail Of Tears State Forest
- Forest Boundary At North Section Line Of Sec 4, T33n, R5e To Forest Boundary At South Section Line Of Sec 35, T32n, R5e
Track Randolph County Lake 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 Randolph County Lake Dam
Where does the data for Randolph County Lake 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 Significant 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 Randolph County Lake Dam.