Above-ground marker posts (non-locating) are typically placed at intervals of how many feet?

Study for the BICSI OSP Design Test. Prepare using multiple choice questions, with hints and explanations to enhance understanding. Succeed in your exam journey!

Spacing above-ground marker posts so they appear about every 500 ft gives a reliable visual cue of where the buried route runs without overwhelming cost. These posts provide reference points that help field crews locate or estimate the line’s position along a long route, especially between changes in direction or at crossings. If markers were placed much closer, the cost and maintenance would rise without giving a proportional gain in locating ease. Place them farther apart, like 1000 ft, and you risk losing track of where the trench lies between markers. Since these are non-locating markers, they are for visual reference rather than a precise locateable signal, so 500 ft strikes the right balance between usable guidance and practical deployment.