# Relationship history for MSHA mine 0102842

Current hierarchy: **Key Talmadge → G & K Coal Inc → Trinity 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:** Lynn Energy Inc → Trinity Mine; 1989-11-01 to 1991-06-02; source msha-controller-operator-history
- **controller_controls_mine:** Lynn Billy R → Trinity Mine; 1989-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lynn Billy R → Lynn Energy Inc; 1989-11-01 to 1991-06-02; source msha-controller-operator-history
- **operator_operates_mine:** G & K Coal Inc → Trinity Mine; 1991-06-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Key Talmadge → Trinity Mine; 1991-06-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Key Talmadge → G & K Coal Inc; 1991-06-03 to current/open; source msha-controller-operator-history