The Rocky Fork Enterprise or Gahanna This Week News has a circulation of over 14,000. Gahanna This Week News covers the entire cities of Gahanna and Blacklick. Primarily in Gahanna-Jefferson school district. It is bounded by Morse Road to the north, Franklin-Licking County line to the east, Broad Street to the south, and I-270 to the west. Primary zip codes: 43230, 43004. Thursday delivery. The Gahanna This Week is in the Columbus, OH DMA. The Gahanna This Week offers ROP and insert advertising opportunities in its daily circulation. Echo Media has direct relationships with over 7,500 newspapers providing tremendous local coverage.