Hemlock
Hemlock is an earth dam located in Sauk County, Wisconsin, built in 1964. It carries a Low hazard potential classification and has a fair condition assessment.
About Hemlock
The primary purpose of Hemlock is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Sauk County (local government). It impounds the Hemlock Slough Of Baraboo R. near La Valle.
The dam stands 11 feet tall and stretches 1,800 feet across, creates a reservoir covering 12 acres, has a maximum storage capacity of 85 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1964, the structure is well into its service life at over 50 years old.
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. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 06/16/2016.
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Location
| State | Wisconsin |
| County | Sauk |
| Nearest City | La Valle |
| River/Stream | Hemlock Slough Of Baraboo R. |
| Coordinates | 43.58840, -90.14498 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 11 ft |
| Dam Height | 11 ft |
| Dam Length | 1,800 ft |
| Year Completed | 1964 (62 years old) |
Storage & Hydraulics
| NID Storage | 85 acre-ft |
| Max Storage | 85 acre-ft |
| Normal Storage | 50 acre-ft |
| Surface Area | 12 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 45 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Sauk County |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 06/16/2016 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WI01055 |
| Federal ID | WI01055 |
| More Info | State Dam Safety Program |