Pearl City Lagoon Dam dam
Pearl City Lagoon Dam
Located in Pearl City, Illinois, the Pearl City Lagoon Dam is a local government-owned structure that serves as a crucial water resource for the area. Completed in 1970, this earth dam stands at a height of 11 feet and has a length of 1700 feet, providing a maximum storage capacity of 16 acre-feet. The dam is regulated by the Illinois Department of Natural Resources (IDNR) and undergoes regular inspections to ensure its safety and functionality.
The primary purpose of the Pearl City Lagoon Dam is classified as "Other", with a spillway type of "Uncontrolled". The dam poses a significant hazard potential and is rated as having a moderate risk level. While the condition assessment is currently listed as "Not Available", the dam is subject to inspection every three years to monitor its structural integrity. In case of emergencies, an Emergency Action Plan (EAP) may be implemented, although details on its preparation and guidelines adherence are not provided in the data.
With its location along the Yellow Creek offstream, the Pearl City Lagoon Dam plays a crucial role in managing water resources in Stephenson County, Illinois. Climate and water resource enthusiasts can appreciate this structure as a key component of the local ecosystem, supporting water storage and management 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 Pearl City Lagoon Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Pecatonica River At Freeport | 1,000 cfs | → |
| Pecatonica River At Martintown | 922 cfs | → |
| Apple River Near Hanover | 94 cfs | → |
| Elkhorn Creek Near Penrose | 81 cfs | → |
| Rock River At Byron | 7,660 cfs | → |
| Pecatonica River At Darlington | 305 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Pearl City Lagoon Dam.
Boat launches
- West Cedarville Road Lena
- Jane Addams Trail Freeport
- Wayne King Drive Savanna
- Pecatonica River -- Pecatonica Bridge At Sth 11
- Pecatonica River -- Sargent Rd Access
- Beckman Lake -- Cadiz Springs State Park
Track Pearl City Lagoon 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 Pearl City Lagoon Dam
Where does the data for Pearl City Lagoon 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 Pearl City Lagoon Dam.