# Relationship history for MSHA mine 4605657

Current hierarchy: **Marcum Willis → Mar-Mac Coal Company Inc → No 2**

- 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:** West Ruby W → No 2; 1977-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Jog Coal Company → No 2; 1977-10-01 to 1981-09-23; source msha-controller-operator-history
- **controller_controls_operator:** West Ruby W → Jog Coal Company; 1977-10-01 to 1981-09-23; source msha-controller-operator-history
- **operator_operates_mine:** Kristi Ann Coal Inc → No 2; 1981-09-24 to 1983-07-28; source msha-controller-operator-history
- **controller_controls_mine:** Mounts Jimmy-Jerry Cline Et Al → No 2; 1981-09-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mounts Jimmy-Jerry Cline Et Al → Kristi Ann Coal Inc; 1981-09-24 to 1983-07-28; source msha-controller-operator-history
- **operator_operates_mine:** Top Job Inc → No 2; 1983-07-29 to 1984-03-22; source msha-controller-operator-history
- **controller_controls_mine:** Cline Fred & James Henderson → No 2; 1983-07-29 to 1987-10-11; source msha-controller-operator-history
- **controller_controls_operator:** Cline Fred & James Henderson → Top Job Inc; 1983-07-29 to 1984-03-22; source msha-controller-operator-history
- **controller_controls_mine:** Marcum Willis → No 2; 1983-12-05 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mar-Mac Coal Company Inc → No 2; 1984-03-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marcum Willis → Mar-Mac Coal Company Inc; 1984-03-23 to current/open; source msha-controller-operator-history