Prairie State Energy Raw Water Dam dam
Prairie State Energy Raw Water Dam
Located in Marissa, Illinois, the Prairie State Energy Raw Water Dam, also known as Prairie State Energy/Marissa/Pond 2 Dam, was completed in 2010 by URS Corporation. This earth dam stands at a height of 39.5 feet and serves primarily as a water supply structure, with a storage capacity of 2422 acre-feet and a surface area of 0.11 square miles. The dam is regulated by the Illinois Department of Natural Resources and undergoes regular inspections for safety and compliance.
With a high hazard potential and risk assessment rating of 2, the Prairie State Energy Raw Water Dam is considered a critical infrastructure for water resource management in the region. It is designed to withstand the perched river or stream conditions in the area and has a stone core and soil foundation. While the dam does not have a spillway, its purpose is to ensure a reliable water supply for the surrounding community. The dam's emergency action plan was last revised in August 2017, highlighting the importance of preparedness in the face of potential risks and emergencies.
As a key component of the water supply infrastructure in Washington County, Illinois, the Prairie State Energy Raw Water Dam plays a crucial role in managing water resources and ensuring a sustainable supply for the local area. Its construction and design reflect the collaborative efforts of public utilities and regulatory agencies to uphold safety standards and protect the environment. With its strategic location and high hazard potential, the dam represents a vital asset in the region's resilience against climate change impacts and water resource challenges.
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 Prairie State Energy Raw Water Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Kaskaskia River At New Athens | 12,700 cfs | → |
| Kaskaskia River Near Venedy Station | 10,800 cfs | → |
| Silver Creek Near Freeburg | 1,840 cfs | → |
| Richland Creek Near Hecker | 223 cfs | → |
| Little Crooked Creek Near New Minden | 12 cfs | → |
| Shoal Creek Near Breese | 2,820 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Prairie State Energy Raw Water Dam.
Boat launches
- North 1st Street 2252, Fayetteville
- Il 13 New Athens
- Randolph County
- Phegley Resort Lane Randolph County
- St Ellen Mine Trail O'Fallon
- Water Street Chester
Campgrounds
- Washington County Lake State Conservation Area
- Scott Afb Military
- Randolph County State Conservation Area
- Pyramid State Park
- Fort Kaskaskia State Park
- Dam West - Lake Carlyle
Track Prairie State Energy Raw Water 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 Prairie State Energy Raw Water Dam
Where does the data for Prairie State Energy Raw Water 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 High 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 Prairie State Energy Raw Water Dam.