What does the term 'Control Line' describe in wildland fire terms?

• A. A line only along property boundaries
• B. All-inclusive term for constructed or natural barriers and treated fire edges used to control a wildland fire
• C. A temporary line used only during suppression
• D. A painted boundary line on the ground

Answer: (B)

A control line is an all-inclusive term for the barriers and edges used to contain a wildland fire. It covers constructed firelines dug or built by crews, natural barriers such as rivers, rocky terrain, or already burned areas, and treated fire edges like fuel breaks or backburns that help slow or stop the spread. The purpose is to create a boundary across which the fire cannot easily advance, enabling suppression actions to work safely and effectively. This goes beyond property boundaries, and it’s not limited to temporary lines or painted marks on the ground—control lines are the actual lines, formed by physical features or treated edges, used to control the fire.