Little Yellow 11 dam
Little Yellow 11
Little Yellow 11, also known as Structure 29, is a gravity dam located in Juneau, Wisconsin, along the Spencer Robinson Ditch. Completed in 1975, this Federal-owned dam serves primarily for irrigation purposes, with additional functions including recreation and water supply. Standing at a height of 15 feet and a length of 72 feet, Little Yellow 11 has a storage capacity of 1200 acre-feet and a drainage area of 8 square miles.
Despite being classified as having a low hazard potential, Little Yellow 11 is rated as having a very high risk due to its condition assessment being unrated. The dam has not been inspected recently, with an inspection frequency of 10 years. Emergency action plans and risk assessment are lacking, indicating a need for improved safety measures and management. The dam's location in a high-risk area underscores the importance of proactive measures to mitigate potential risks and ensure the safety of surrounding communities.
As an integral part of the water infrastructure in Wisconsin, Little Yellow 11 plays a crucial role in irrigation and water supply in the region. With its controlled spillway and moderate storage capacity, the dam serves as a key resource for managing water levels and supporting agricultural activities. However, the lack of recent inspections and emergency preparedness highlights the need for increased attention to safety protocols and risk management to safeguard the dam and surrounding areas from potential hazards.
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 Little Yellow 11 -- 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 | → |
| Tenmile Creek Near Nekoosa | 126 cfs | → |
| Lemonweir River At New Lisbon | 309 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 Little Yellow 11.
Boat launches
- Petenwell Lake - 20th Drive Access - Wisconsin River Power Company (Wrpco)
- Petenwell Lake - Wilderness Park Access
- Petenwell Lake -- 20th Drive Access
- Wisconsin River / Petenwell Flowage -- Access Off Blackhawk Dr.
- Petenwell Lake -- Petenwell Park Access Off Bighorn Dr. (Adams Co)
- Wisconsin River -- Access At Hwy 21 - Town Of Strongs Prairie
Track Little Yellow 11 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 Little Yellow 11
Where does the data for Little Yellow 11 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 Little Yellow 11.