Crossover Island Light Station
Approximate location: the National Park Service places this pin arbitrarily within the property, not at a surveyed point (stated accuracy ±12 m).
Why it's listed
Crossover Island Light Station occupies a 1.5-acre island in the middle of the St. Lawrence River near Oak Point, New York, where large vessels cross between the Canadian and American channels. The complex was first built in 1847-48 and almost completely rebuilt in 1882. It includes a 37-foot brick tower clad in cast iron, a two-story Carpenter Gothic keeper's cottage, a boathouse, an ice house, a granite seawall and a small stone ash house, the only survivor from 1847. Soil for the island's trees and grass was carried over by boat, since the island began as bare rock. The station was designed to be self-sustaining during long periods of isolation. It was listed for its role in the nineteenth-century federal system of navigation aids and for its architecture. The light was deactivated in 1947, though the tower still serves as a daymark. The island is now a private seasonal retreat.
Significance in brief: The nomination argues the station is significant under maritime history and architecture for its role in the federal system of navigation aids on the St. Lawrence River in the nineteenth century. It is a self-sustaining off-shore light station complex, with a substantially intact Carpenter Gothic keeper's cottage. Its history closely parallels that of Rock Island Light Station, suggesting a regional station type.
Machine-generated summary. This summary was generated by a language model from the official nomination document and has not been reviewed line by line by an editor. It may contain errors. Check the source document before relying on any detail. Source: nomination document (PDF) · National Archives catalog entry. NRHP reference 07001037, listed October 3, 2007. Summary generated October 2026 (model claude-sonnet-5-5, prompt v1.0-2026-10-29, confidence high).
Key facts
| Address | Crossover Island, St. Lawrence |
|---|---|
| County | St. Lawrence County |
| Listed | October 3, 2007 |
| Reference number | 07001037 |
| Resource type | Structure |
| Period of significance | 1847 - 1947 |
| Architectural style | Carpenter Gothic (keeper's cottage); architectural classification on the form is listed as "na" |
| Criteria |
|
| Areas of significance | Maritime History, Architecture |
| Level of significance | Local |
| Status (as stated in the nomination) | Lighthouse deactivated in 1947 but still serves as a daymark; the island is privately owned and used as a seasonal retreat. The ash house is in excellent condition, and the cottage retains its original room layout. |
| Acreage | 1.5 |
| Coordinates | 44.49896, -75.77801 (NPS GIS) |
What listing means for this property
For a publicly owned building or structure, listing mainly matters when federal funds, permits or licences are involved: projects then go through Section 106 review so effects on the property are considered. Listing also strengthens applications for preservation grants and, for leased income-producing uses, can enable the federal rehabilitation tax credit.
General information, not legal or tax advice. Rules change; confirm with your State Historic Preservation Office or a qualified adviser.
Sources and further reading
- National Park Service, National Register of Historic Places database (snapshot May 2026), reference 07001037.
- Nomination form (PDF, National Archives) — catalog entry
- Wikipedia article (used for cross-checking only; text not reproduced here)
- Wikidata Q5188764
- This listing as JSON
Last updated October 2026. Found an error? See the editorial policy for how to report it.