Walnut Point Dam dam
Walnut Point Dam
Walnut Point Dam, also known as Jim Lancaster Dam, is a private structure located in Mapleton, Illinois. Managed by McClure Engineering Associates, Inc., this earth dam serves primarily as a Fish and Wildlife Pond, with additional purposes including recreation. The dam stands at a height of 58 feet and stretches for 545 feet, providing a storage capacity of 275 acre-feet and a surface area of 12.2 acres.
Situated on the TRIB WEST BRANCH LAMARSH CR river or stream, the dam is regulated by the Illinois Department of Natural Resources (IDNR) and is inspected regularly to ensure its safety and functionality. With a low hazard potential and a moderate risk assessment, Walnut Point Dam poses minimal threat but is still monitored closely for any potential issues. Although the condition assessment is currently listed as 'Not Available,' the dam's emergency action plan status and risk management measures are also under review for future updates.
Water resource and climate enthusiasts will appreciate the unique features of Walnut Point Dam, such as its uncontrolled spillway system and the tranquil environment it provides for fish and wildlife. With its strategic location in Peoria County and the active involvement of private ownership, this dam serves as a valuable asset for both environmental conservation and recreational activities in the region. As efforts continue to maintain and improve the dam's infrastructure, it remains an important landmark for water management and conservation efforts in Illinois.
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 Walnut Point Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Illinois River At Kingston Mines | 11,700 cfs | → |
| Fondulac Creek Near East Peoria | 0 cfs | → |
| Farm Creek At Farmdale | 11 cfs | → |
| Mackinaw River Near Green Valley | 431 cfs | → |
| Mackinaw River Near Congerville | 286 cfs | → |
| Indian Creek Near Wyoming | 22 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Walnut Point Dam.
Boat launches
- Mendenhall Park
- Spring Lake Road Tazewell County
- Sebree Road Fulton County
- Lakeland Park Road 26005, Canton
- West Pine Street 1, Chillicothe
- Lakeview Drive 1717, Eureka
Track Walnut Point 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 Walnut Point Dam
Where does the data for Walnut Point 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 Walnut Point Dam.