Pool Thirty Three dam
Pool Thirty Three
Pool Thirty Three is a federal-owned recreational dam located in Wisconsin Dells, Wisconsin, along the Little Yellow River. Completed in 1947, this earth dam stands at a height of 7 feet and spans a length of 6050 feet, with a storage capacity of 2170 acre-feet. The dam serves primarily for recreational purposes, providing a surface area of 74 acres for activities such as boating and fishing.
Despite being a significant hazard potential dam with a moderate risk assessment, Pool Thirty Three has not been rated for its condition assessment. The last inspection took place in July 2007, with an inspection frequency of 3 years. The dam features an uncontrolled spillway type and has a maximum discharge capacity of 3350 cubic feet per second. Although the dam is not under state regulation, it is permitted, enforced, and inspected by the state authorities.
Water resource and climate enthusiasts interested in the management and safety of dams will find Pool Thirty Three to be an intriguing case study. With its historical significance and recreational value, this dam showcases the balancing act between providing public enjoyment while ensuring safety and risk management in the face of potential hazards. The data provides a glimpse into the complexities of dam ownership, regulation, and maintenance in safeguarding water resources for future generations.
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 Pool Thirty Three -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Yellow River At Necedah | 240 cfs | → |
| Yellow River At Babcock | 51 cfs | → |
| Lemonweir River At New Lisbon | 309 cfs | → |
| Tenmile Creek Near Nekoosa | 126 cfs | → |
| Wisconsin River At Wisconsin Rapids | 3,370 cfs | → |
| Black River Ds St Hwy 54 @ Black River Falls | 918 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Pool Thirty Three.
Boat launches
- Petenwell Lake - 20th Drive Access - Wisconsin River Power Company (Wrpco)
- Petenwell Lake - Wilderness Park Access
- Wisconsin River -- Access At Hwy 21 - Town Of Strongs Prairie
- Wisconsin River / Petenwell Flowage -- Access Off Blackhawk Dr.
- Petenwell Lake -- 20th Drive Access
- Petenwell Lake -- Petenwell Park Access Off Bighorn Dr. (Adams Co)
Track Pool Thirty Three 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 Pool Thirty Three
Where does the data for Pool Thirty Three 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 Pool Thirty Three.