# Relationship history for MSHA mine 1512817

Current hierarchy: **Jamestown Resources Inc → Patrick Coal 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

- **controller_controls_mine:** Patrick James → No 1 Surface Mine; 1981-02-18 to 1981-11-23; source msha-controller-operator-history
- **operator_operates_mine:** Patrick Coal Company Inc → No 1 Surface Mine; 1981-04-01 to 1981-11-08; source msha-controller-operator-history
- **controller_controls_operator:** Patrick James → Patrick Coal Company Inc; 1981-04-01 to 1981-11-08; source msha-controller-operator-history
- **operator_operates_mine:** Patrick Coal Company Inc → No 1 Surface Mine; 1981-11-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jamestown Resources Inc → No 1 Surface Mine; 1981-11-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jamestown Resources Inc → Patrick Coal Company Inc; 1981-11-09 to current/open; source msha-controller-operator-history