# Relationship history for MSHA mine 0400927

Current hierarchy: **Barksdale Bill-Sidney L Payne → Fannin-Superior Gypsum Company Inc → Lost Hills Mines**

- 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:** Fannin-Superior Gypsum Company → Lost Hills Mines; 1950-01-01 to 1983-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Buttes Gas & Oil Company → Lost Hills Mines; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Buttes Gas & Oil Company → Fannin-Superior Gypsum Company; 1950-01-01 to 1983-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Fannin-Superior Gypsum Company Inc → Lost Hills Mines; 1983-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Barksdale Bill-Sidney L Payne Et Al → Lost Hills Mines; 1983-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Barksdale Bill-Sidney L Payne Et Al → Fannin-Superior Gypsum Company Inc; 1983-11-01 to current/open; source msha-controller-operator-history