# Relationship history for MSHA mine 1513644

Current hierarchy: **Payne Clyde → Pit River Energy Inc → No 1 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

- **controller_controls_mine:** Middleton Bob Et Al → No 1 Mine; 1982-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** B & D Coal Company → No 1 Mine; 1982-08-01 to 1983-04-20; source msha-controller-operator-history
- **controller_controls_operator:** Middleton Bob Et Al → B & D Coal Company; 1982-08-01 to 1983-04-20; source msha-controller-operator-history
- **operator_operates_mine:** Lucky Coal Company → No 1 Mine; 1983-04-21 to 1983-08-25; source msha-controller-operator-history
- **controller_controls_mine:** Middleton Obie Et Al → No 1 Mine; 1983-04-21 to 1983-08-25; source msha-controller-operator-history
- **controller_controls_operator:** Middleton Obie Et Al → Lucky Coal Company; 1983-04-21 to 1983-08-25; source msha-controller-operator-history
- **operator_operates_mine:** Pit River Energy Inc → No 1 Mine; 1983-08-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Payne Clyde → No 1 Mine; 1983-08-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Payne Clyde → Pit River Energy Inc; 1983-08-26 to current/open; source msha-controller-operator-history