PORTLAND DOERNBECHER MFG STACK — NGS RD3228

This trigonometric station is part of the National Geodetic Survey's network of control points that establishes the geometric foundation for surveying and mapping activities throughout the United States. Located near Portland, Oregon, at coordinates 45.53140°N, 122.63665°W, this trig point serves as a reference for horizontal positioning in the region. Trigonometric stations of this type were historically established to provide accurate horizontal control for cadastral surveys, engineering projects, and mapping efforts. Such points remain valuable for verifying consistency within the geodetic network and for supporting modern surveying operations that may reference historical control data. The documented position of this benchmark contributes to the collective body of control information maintained by NGS. Field verification and documentation of such points help ensure the continued reliability of the nation's surveying infrastructure.

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