Lower Columbia Quarry Dam is a dam located in Macoupin County, Illinois. It carries a Low hazard potential classification.
Dam profile
NID height · 30 ft30 ft tall and 600 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 Lower Columbia Quarry Dam
The primary purpose of Lower Columbia Quarry Dam is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is private-owned.
The dam stands 30 feet tall and stretches 600 feet across, and has a maximum storage capacity of 100 acre-feet.
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. The most recent inspection on record was 05/23/2024.
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Location
| State | Illinois |
| County | Macoupin |
| Nearest City | Benld |
| Coordinates | 39.10752, -89.79151 |
Physical Characteristics
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 600 ft |
Storage & Hydraulics
| NID Storage | 100 acre-ft |
| Max Storage | 100 acre-ft |
| Normal Storage | 40 acre-ft |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 05/23/2024 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL50686 |
| Federal ID | IL50686 |
| More Info | State Dam Safety Program |