# Relationship history for MSHA mine 1508267

Current hierarchy: **Pelphrey Paul A-Pres → Abco Mining Company Inc → No 1 Surface 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:** Seitz Montgomery Coal Company Inc → No 1 Surface Mine; 1975-04-01 to 1981-06-18; source msha-controller-operator-history
- **controller_controls_mine:** Montgomery Garner → No 1 Surface Mine; 1975-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Montgomery Garner → Seitz Montgomery Coal Company Inc; 1975-04-01 to 1981-06-18; source msha-controller-operator-history
- **operator_operates_mine:** Abco Mining Company Inc → No 1 Surface Mine; 1981-06-19 to 1982-08-16; source msha-controller-operator-history
- **controller_controls_mine:** Cline James R → No 1 Surface Mine; 1981-06-19 to 1982-08-16; source msha-controller-operator-history
- **controller_controls_operator:** Cline James R → Abco Mining Company Inc; 1981-06-19 to 1982-08-16; source msha-controller-operator-history
- **operator_operates_mine:** Abco Mining Company Inc → No 1 Surface Mine; 1982-08-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Pelphrey Paul A-Pres → No 1 Surface Mine; 1982-08-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pelphrey Paul A-Pres → Abco Mining Company Inc; 1982-08-17 to current/open; source msha-controller-operator-history