What is a Temporary Benchmark (TBM)?

A Temporary Benchmark (TBM) refers to a reference point established specifically for a particular job or project. It serves as a point of known elevation that surveyors or construction workers can use during the course of their work to ensure that elevations are consistent and accurate throughout the project. Unlike permanent benchmarks, which are typically used for long-term surveying and are established to remain in place indefinitely, TBMs are often set up temporarily and may be removed or become obsolete once the job is completed.

The specific context of a TBM highlights its utility in providing convenient and immediate reference points in dynamic work environments where exact elevations are critical for the success of grading, excavation, or construction tasks. It is essential for ensuring that the work aligns correctly with design specifications, particularly during time-sensitive applications.