# Relationship history for MSHA mine 3400904

Current hierarchy: **Casto Don → Fuel Dynamics Inc → Black Diamond**

- 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:** Fuel Dynamics Inc → Black Diamond; 1975-01-01 to 1980-03-05; source msha-controller-operator-history
- **controller_controls_mine:** Clower Gary E → Black Diamond; 1975-01-01 to 1980-03-05; source msha-controller-operator-history
- **controller_controls_operator:** Clower Gary E → Fuel Dynamics Inc; 1975-01-01 to 1980-03-05; source msha-controller-operator-history
- **operator_operates_mine:** Fuel Dynamics Inc → Black Diamond; 1980-03-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Casto Don → Black Diamond; 1980-03-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Casto Don → Fuel Dynamics Inc; 1980-03-06 to current/open; source msha-controller-operator-history