Trepagnier Plantation

The plantation was later known as Diamond, and Diamond is now a Black neighborhood of about four blocks facing the Shell refinery. One summer day in 1973 a lawnmower spark ignited gas leaking from a Shell pipeline on Washington Street. Helen Washington died in her house, and Leroy Jones, 16, who was cutting her grass, died days later. On May 5, 1988, a cracking-unit explosion killed seven refinery workers, injured 48 people and sent about 4,500 into evacuation. Residents later negotiated a settlement with Shell that took effect in 2002.

Where it stands

Worth the stop nearby

• Destrehan Plantation — 4.7 mi
  A River Road house begun in 1787 where, in January 1811, a tribunal of five slaveholders tried people who had risen on the German Coast, and where an exhibit now tells the revolt.
• Whitney Plantation — 14 mi
  A museum on a former sugar plantation along the River Road that tells its story through the people who were enslaved there, with memorials to 107,000 enslaved Louisianans and 2,200 children.
• Lafayette Cemetery No. 1 — 20 mi
  The Garden District's 1833 cemetery of about 1,100 family tombs, closed to visitors in 2019 and reopened on October 1, 2026 for small guided tours run by the Preservation Resource Center.
• St. Louis Cemetery No. 1 — 21 mi
  New Orleans' oldest surviving city of the dead, opened in 1789 after the fire of 1788 and the burial place of Homer Plessy, reachable only on a guided tour since March 2015.

More markers nearby

• Thomas J. Sellers — steps away
• Slave Revolt — steps away
• Prospect Plantation (1815-1920) — steps away
• More Gather to Fight For Freedom — 0.9 mi