What does it mean when a vertical control point has Benchmark coincident with a found section corner?

What does it mean when a vertical control point has Benchmark coincident with a found section corner?

• A. A vertical control point where Benchmark coincident with found section corner.
• B. A vertical control point with a tablet.
• C. A recoverable mark with no tablet.
• D. A U.S. location monument.

Answer: (A)

The key idea is how vertical control points get their known elevation: from a fixed benchmark. If a benchmark is coincident with a found section corner, it means the same physical point serves as both the vertical control reference (the benchmark with a known elevation) and the cadastral reference (the section corner found in the field). So you have a known elevation right at the exact location of that section corner, giving you reliable vertical control tied to the cadastral point. This isn’t about merely having a tablet or a recoverable mark without a tablet, and it’s not about a U.S. location monument. The situation described specifically combines the benchmark’s elevation reference with the found section corner at one spot.

The key idea is how vertical control points get their known elevation: from a fixed benchmark. If a benchmark is coincident with a found section corner, it means the same physical point serves as both the vertical control reference (the benchmark with a known elevation) and the cadastral reference (the section corner found in the field). So you have a known elevation right at the exact location of that section corner, giving you reliable vertical control tied to the cadastral point.

This isn’t about merely having a tablet or a recoverable mark without a tablet, and it’s not about a U.S. location monument. The situation described specifically combines the benchmark’s elevation reference with the found section corner at one spot.