| Name | Distance | Bearing |
|---|
| Milan Quarry; Inc. (Milan Stone Quarry), Rock Island Co., Illinois, USA | 2.5km (8200 feet) | 185° (S) |
| Rock Island City Engineering., Rock Island Co., Illinois, USA | 3.6km (2.2 miles) | 352° (N) |
| U. S. Army Engineers, Rock Island Co., Illinois, USA | 3.6km (2.2 miles) | 352° (N) |
| Bettendorf Stone Company Quarry, Rock Island Co., Illinois, USA | 8.4km (5.2 miles) | 47° (NE) |
| Linwood Mine, Buffalo, Scott Co., Iowa, USA | 13.1km (8.2 miles) | 265° (W) |
| LaFarge (Buffalo) Quarry, Buffalo, Scott Co., Iowa, USA | 13.6km (8.4 miles) | 268° (W) |