UM 115 — NGS DP3019 — Belleville, US

This triangulation station is part of the NGS network, which establishes the primary geodetic control framework for surveying and mapping activities throughout the United States. Triangulation stations of this type serve as precise horizontal control points, enabling surveyors and engineers to reference their local measurements to the national coordinate system. Located near Belleville, Illinois, at coordinates 38.58008°N, 90.03803°W, this benchmark contributes to regional survey accuracy in southwestern Illinois. The elevation of this station has not been recorded in available documentation. As a fundamental control point, this station's coordinates and monumentation are valuable for verifying modern survey networks, establishing local project baselines, and ensuring consistency across adjacent survey areas. Professional surveyors are encouraged to report any changes to the monument's condition or accessibility to support maintenance of the geodetic infrastructure.

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