United States National Register of Historic Places |
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Saugatuck Gap Filler Annex
| NRHP ID: 100008508 |
| Location (in/near): Saugatuck, Michigan |
| Listed: 2022-12-28 |
| Role: Structure |
| Significance region: State |
| Significance area(s): Engineering; Military |
Data from United States Park Service and Wikidata