STATE SURVEY 9 11 1969 — NGS TU1628 — Waipahu, US

This triangulation station is part of the National Geodetic Survey's network of horizontal control points established to support precise surveying and mapping across the United States. Located near Waipahu on the island of Oahu, Hawaii, at coordinates 21.46161° North, 158.05653° West, this trig point serves as a fundamental reference for local and regional geodetic work. Triangulation stations of this type were historically instrumental in developing accurate survey networks before modern satellite positioning became prevalent. The point's documented position enables surveyors to verify local survey work, establish datum connections, and maintain consistency in mapping and engineering projects. Verification and archival of such benchmarks remain valuable for quality assurance in surveying operations and for understanding the historical geodetic framework of Hawaii's infrastructure.

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