Coolidge Creek Dam dam
Coolidge Creek Dam
Coolidge Creek Dam, also known as Westlake Village Dam, is a private earth dam located in Pecatonica, Illinois, on Coolidge Creek. Built in 1998 by Hanson Engineers, Inc., this recreational dam stands at a height of 22 feet with a length of 1600 feet. It has a storage capacity of 1620 acre-feet, with a normal storage level of 507 acre-feet and a surface area of 83 acres.
Managed by the Illinois Department of Natural Resources, Coolidge Creek Dam has a low hazard potential and a moderate risk assessment rating. The dam features an uncontrolled spillway with a width of 70 feet and uncontrolled outlet gates. While the dam is inspected every five years, its condition assessment is currently not available. Despite its recreational purpose, the dam's risk management measures and emergency action plan status remain unclear.
Located within Winnebago County, Coolidge Creek Dam serves as a popular spot for outdoor activities in the area. With its picturesque surroundings and ample storage capacity, the dam provides both recreational opportunities and essential water resource management for the local community. Climate and water resource enthusiasts can appreciate the engineering behind this structure and its role in balancing human needs with environmental conservation.
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 Coolidge Creek Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Pecatonica River Nr Shirland | 1,650 cfs | → |
| Rock River At Byron | 6,620 cfs | → |
| Rock River At Rockton | 5,610 cfs | → |
| Kishwaukee River Near Perryville | 625 cfs | → |
| Pecatonica River At Freeport | 904 cfs | → |
| Sugar River Near Brodhead | 400 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Coolidge Creek Dam.
Boat launches
- Lakeshore Drive 3630, Winnebago County
- Winnebago County
- Yale Bridge Road Winnebago County
- Rock River Recreation Path Rockford
- Breckenboro Road 2226, Winnebago County
- Draft Machesney Park
Campgrounds
- Rivers Edge Campground
- Sugar River Forest Preserve - Riverfront
- Sugar River Forest Preserve - Pine Tree
- Orpr Camp
- Hononegah Forest Preserve Campground
- Shady Rest Camping Area
Fishing spots
Track Coolidge Creek 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 Coolidge Creek Dam
Where does the data for Coolidge Creek 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 Coolidge Creek Dam.