Fire Line is defined as which of the following?

• A. A line created by mowing grass to create a firebreak
• B. A decorative marking line
• C. Part of a control line that is scraped or dug to mineral soil
• D. A natural barrier formed by a river

Answer: (C)

A fire line is the portion of a control line where all flammable material has been removed down to mineral soil. By scraping or digging to mineral soil, crews eliminate fuels such as grass, duff, and roots, creating a nonflammable barrier that helps stop fire spread and reduces the chance of re-ignition. This is more protective than simply mowing to form a firebreak, which can leave fuels behind that still burn or spark from embers. Natural barriers like rivers can help contain fires but aren’t fire lines themselves.