Old Stone Mill dam
Old Stone Mill
The Old Stone Mill, also known as Cravath Lake, is a historic gravity dam located in Whitewater, Wisconsin, along the Whitewater Creek. Built in 1839, this dam serves primarily for recreational purposes and stands at a height of 17 feet with a storage capacity of 940 acre-feet. The dam has a significant hazard potential, with a high risk assessment due to its age and condition.
Despite its age, the Old Stone Mill dam has been regularly inspected and maintained, with its last inspection conducted in March 2020. The condition assessment reports the dam as fair, but the risk of failure is considered very high. Emergency action plans are in place to address any potential hazards that may arise, but the risk management measures are not specified. The dam's historical significance and potential risks make it a focal point for water resource and climate enthusiasts interested in the preservation and management of aging infrastructure in Wisconsin.
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 Old Stone Mill -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Rock River At Robert Street At Fort Atkinson | 2,260 cfs | → |
| Bark River Near Rome | 116 cfs | → |
| Jackson Creek At Mound Road Near Elkhorn | 4 cfs | → |
| Turtle Creek At Carvers Rock Road Near Clinton | 194 cfs | → |
| Crawfish River At Milford | 624 cfs | → |
| Mukwonago River At Mukwonago | 45 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Old Stone Mill.
Boat launches
- Trippe Lake Park
- Rice Lake -- Access
- Bark River -- Access
- Cruise Lane 7699, Town Of Whitewater
- Blue Spring Lake -- Access Nr Blue Spring Lk Rd And South Shore
- Turtle Lake Public Boat Launch
Campgrounds
- Kmsf-Su Shelter 3
- Jellystone Campground
- Kmsf-Su Shelter 2
- Hidden Valley Rv Resort
- Ottawa Lake Campground
- Pinewoods Campground
Fishing spots
Track Old Stone Mill 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 Old Stone Mill
Where does the data for Old Stone Mill 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 Old Stone Mill.