Rynearson Dam No. 2 dam
Rynearson Dam No. 2
Rynearson Dam No. 2, located in Necedah, Wisconsin, is a Federal-owned earth dam that was completed in 1939. Managed by the Fish and Wildlife Service, the primary purpose of this dam is to create a fish and wildlife pond, providing essential habitat for local species. With a height of 20 feet and a length of 2877 feet, the dam has a normal storage capacity of 1360 acre-feet and covers a surface area of 680 acres.
This dam is associated with the Branch of Little Yellow Creek and is regulated at the state level, with permitting and enforcement responsibilities falling under the jurisdiction of the state agency. The dam has a low hazard potential and is in satisfactory condition as of the last inspection in July 2018. With a history of modifications and major rehabilitation in 2002, Rynearson Dam No. 2 continues to serve its purpose of supporting fish and wildlife in the region while also contributing to local water resource management efforts.
Water resource and climate enthusiasts will appreciate the vital role that Rynearson Dam No. 2 plays in maintaining the ecological balance of the area, providing a reliable water source for wildlife and contributing to the overall health of the ecosystem. With its strategic location in Juneau County, this dam serves as a key component in the management of water resources and flood control measures in the region. As a Federal-owned structure, it exemplifies the collaborative efforts between government agencies to ensure the sustainability and resilience of water 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 Rynearson Dam No. 2 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Yellow River At Necedah | 240 cfs | → |
| Lemonweir River At New Lisbon | 309 cfs | → |
| Yellow River At Babcock | 51 cfs | → |
| Tenmile Creek Near Nekoosa | 126 cfs | → |
| Wisconsin River At Wisconsin Rapids | 3,370 cfs | → |
| Kickapoo River At State Highway 33 At Ontario | 149 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Rynearson Dam No. 2.
Boat launches
- Wisconsin River -- Access At Hwy 21 - Town Of Strongs Prairie
- Wisconsin River -- Access Nr Cth G Town Of Necedah
- Petenwell Lake - 20th Drive Access - Wisconsin River Power Company (Wrpco)
- Castle Rock Lake -- Buckhorn Wildlife Area- Nr 32nd And 16th
- Castle Rock Lake -- Buckhorn Wildlife Area- Nr Cty G
- Wisconsin River / Petenwell Flowage -- Access Off Blackhawk Dr.
Track Rynearson Dam No. 2 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 Rynearson Dam No. 2
Where does the data for Rynearson Dam No. 2 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 Rynearson Dam No. 2.