VANCOUVER MILL PLAIN ROAD TANK — NGS RD2805

This triangulation station is part of the NGS network, which forms the foundational control infrastructure for surveying and mapping throughout the United States. Trig stations serve as primary horizontal control points, established to support precise geodetic measurements and spatial reference frameworks. Located near Vancouver, Washington at coordinates 45.62967°N, 122.61473°W, this point contributes to regional survey networks in the Pacific Northwest. As a trig station, it was designed to be intervisible with other control points, enabling surveyors to establish accurate positions for subsequent surveys and mapping projects. Documentation and verification of such benchmarks remain essential for maintaining the integrity of the national geodetic datum. Modern surveyors depend on confirmed control point locations for boundary surveys, engineering projects, and geographic information systems. Periodic field verification ensures these reference points continue serving their critical role in spatial infrastructure.

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