# Relationship history for MSHA mine 4200647

Current hierarchy: **Ellis Virgle E → M & E Mining Company → Fire Fly**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Kranjac Mining Company → Fire Fly; 1950-01-01 to 1979-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Kranjac Nicholas J → Fire Fly; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kranjac Nicholas J → Kranjac Mining Company; 1950-01-01 to 1979-12-31; source msha-controller-operator-history
- **operator_operates_mine:** J J Mining → Fire Fly; 1980-01-01 to 1980-11-30; source msha-controller-operator-history
- **controller_controls_mine:** Cowan Jerry D & Jerry G Stewart → Fire Fly; 1980-01-01 to 1980-11-30; source msha-controller-operator-history
- **controller_controls_operator:** Cowan Jerry D & Jerry G Stewart → J J Mining; 1980-01-01 to 1980-11-30; source msha-controller-operator-history
- **controller_controls_mine:** Ellis Virgle E Et Al → Fire Fly; 1980-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** M & E Mining Company → Fire Fly; 1980-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ellis Virgle E Et Al → M & E Mining Company; 1980-12-01 to current/open; source msha-controller-operator-history