Little Yellow 20
Little Yellow 20 is a gravity dam located in Juneau County, Wisconsin, built in 1936. It carries a Low hazard potential classification.
About Little Yellow 20
The primary purpose of Little Yellow 20 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Wisconsin Department Of Natural Resources (state). It impounds the Neal Lateral near Necedah.
The dam stands 8 feet tall and stretches 42 feet across, creates a reservoir covering 10 acres, has a maximum storage capacity of 70 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1936, the structure is well-established, with more than 75 years of service.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. An emergency action plan is in place for this dam. The most recent inspection on record was 06/15/2007. That was over 18 years ago.
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Location
| State | Wisconsin |
| County | Juneau |
| Nearest City | Necedah |
| River/Stream | Neal Lateral |
| Coordinates | 44.18402, -90.23614 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 8 ft |
| Dam Height | 8 ft |
| Dam Length | 42 ft |
| Year Completed | 1936 (90 years old) |
Storage & Hydraulics
| NID Storage | 70 acre-ft |
| Max Storage | 70 acre-ft |
| Normal Storage | 50 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 486 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Wisconsin Department of Natural Resources |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Last Inspection | 06/15/2007 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WI00578 |
| Federal ID | WI00578 |
| More Info | State Dam Safety Program |