Grand Tower Station Ash Pond dam
Grand Tower Station Ash Pond
Grand Tower Station Ash Pond in Illinois is a privately owned structure that falls under state regulation and jurisdiction by the Illinois Department of Natural Resources. Located in Jackson County along the Mississippi River, this Earth-type dam stands at a height of 15 feet and spans 2500 feet in length, with a storage capacity of 150 acre-feet. While the dam's condition assessment is currently unavailable, it poses a significant hazard potential and is categorized as having a moderate risk level, indicating the need for regular inspection and risk management measures.
The last inspection of Grand Tower Station Ash Pond took place in August 2014, with a scheduled inspection frequency of every 3 years. The spillway type is listed as uncontrolled, with no outlet gates or associated structures mentioned. While the Emergency Action Plan (EAP) status and risk assessment details are not available, the dam's risk level is rated as moderate, underscoring the importance of continuous monitoring and preparedness measures. As an offstream structure managed by the St. Louis District, Grand Tower Station Ash Pond serves a primary purpose classified as "Other," highlighting its unique role in water resource management and climate impact mitigation efforts in the region.
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 Grand Tower Station Ash Pond -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Big Muddy River At Rte 127 At Murphysboro | 523 cfs | → |
| South Fork Saline Creek Near Perryville | 21 cfs | → |
| Mississippi River At Chester | 247,000 cfs | → |
| Mississippi River At Thebes | 269,000 cfs | → |
| Big Muddy River At Plumfield | 256 cfs | → |
| Crab Orchard Creek Near Marion | 2 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Grand Tower Station Ash Pond.
Boat launches
- Front Street 677, Grand Tower
- Cape Girardeau County
- Johnson Creek Road Jackson County
- Cedar Creek Boat Ramp
- Il 151 Jackson County
- Spillway Road Williamson County
Campgrounds
- Devils Backbone Park
- Turkey Bayou
- Lake Murphysboro State Park
- Pine Hills
- Pine Hills Campground
- Johnson Creek Campground
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
- 1 Minle Southwest Of Delwood, Il (Sec. 18, T11s, R13e) To Reesville, 1/4 Mile South Of The Confluence With Sugar Creek
- Source, About 2 Miles East Of Delwood, Il (Sec 10, T11s, R6e) To Bridge At Eddyville Blacktop (Se1/4,Sec.16,T12s, R6e)
- Bridge At Eddyville Blacktop To Confluence With Ohio River At Golconda,Il
- Forest Boundary At North Section Line Of Sec 4, T33n, R5e To Forest Boundary At South Section Line Of Sec 35, T32n, R5e
Track Grand Tower Station Ash Pond 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 Grand Tower Station Ash Pond
Where does the data for Grand Tower Station Ash Pond 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 Grand Tower Station Ash Pond.