Lake William Dam is an earth dam located in Pike County, Indiana, built in 1975. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 30 ft30 ft tall and 400 ft long, taller than 68% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Lake William Dam
The primary purpose of Lake William Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Lake Helmerick Village (private). It impounds the Patoka River near Augusta.
The dam stands 30 feet tall and stretches 400 feet across, creates a reservoir covering 5 acres, has a maximum storage capacity of 85 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1975, 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. The most recent inspection on record was 11/24/2015. That was over 10 years ago.
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Location
| State | Indiana |
| County | Pike |
| Nearest City | Augusta |
| River/Stream | Patoka River |
| Coordinates | 38.28088, -87.07328 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 400 ft |
| Year Completed | 1975 (51 years old) |
Storage & Hydraulics
| NID Storage | 85 acre-ft |
| Max Storage | 85 acre-ft |
| Normal Storage | 59 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 5 cfs |
| Spillway Type | None |
Ownership & Safety
| Purpose | Recreation |
| Owner | Lake Helmerick Village |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 11/24/2015 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IN00625 |
| Federal ID | IN00625 |
| More Info | State Dam Safety Program |