# Relationship history for MSHA mine 3303989

Current hierarchy: **Morckel David L → O L D Excavating Inc → Arrow Mine**

- 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:** Midway Coal Inc → Arrow Mine; 1984-10-01 to 1985-12-09; source msha-controller-operator-history
- **controller_controls_mine:** Johnson Clarence R → Arrow Mine; 1984-10-01 to 1985-12-09; source msha-controller-operator-history
- **controller_controls_operator:** Johnson Clarence R → Midway Coal Inc; 1984-10-01 to 1985-12-09; source msha-controller-operator-history
- **operator_operates_mine:** Midway Coal Inc → Arrow Mine; 1985-12-10 to 1986-06-23; source msha-controller-operator-history
- **controller_controls_mine:** Jarrett Edwin W → Arrow Mine; 1985-12-10 to 1986-06-23; source msha-controller-operator-history
- **controller_controls_operator:** Jarrett Edwin W → Midway Coal Inc; 1985-12-10 to 1986-06-23; source msha-controller-operator-history
- **operator_operates_mine:** Midway Coal Inc → Arrow Mine; 1986-06-24 to 1988-11-06; source msha-controller-operator-history
- **controller_controls_mine:** Spears Arnold & Wallace K Skaggs → Arrow Mine; 1986-06-24 to 1988-11-06; source msha-controller-operator-history
- **controller_controls_operator:** Spears Arnold & Wallace K Skaggs → Midway Coal Inc; 1986-06-24 to 1988-11-06; source msha-controller-operator-history
- **operator_operates_mine:** O L D Excavating Inc → Arrow Mine; 1988-11-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Morckel David L → Arrow Mine; 1988-11-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Morckel David L → O L D Excavating Inc; 1988-11-07 to current/open; source msha-controller-operator-history