Located .2 miles along the cliffline from Mantle Rock heading to the NE and is behind some boulders. This is a cave like arch that is 40 ft long. GPS location is approximate.
| Name | Alcove Arch |
| Alternative Names | KY 87 |
| Width of Arch | |
| Height of Arch | 15 |
| Span of Arch | 30 |
| Type of Arch | Cave |
| Upper Rock Layer | n/a |
| Lower Rock Layer | Pounds Sandstone Member of Caseyville Formation: Sandstone |
| Status | |
| Latitude | 37.35734 |
| Longitude | -88.42545 |
| Elevation | |
| Land Owner | State of Kentucky |
| Name of Land | Mantle Rock Nature Preserve |
| County | Livingston |
| Azimuth | |
| Documented by | Chris Moore |
| Submitted by | Bill Fultz |