# Relationship history for MSHA mine 1511952

Current hierarchy: **Rogers Lynn G → Mount Vernon Mining Inc → No 1 Surface**

- 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:** Kestner Coal Company → No 1 Surface; 1979-07-01 to 1980-06-05; source msha-controller-operator-history
- **controller_controls_mine:** Kestner Graham & Leroy Malicote → No 1 Surface; 1979-07-01 to 1980-06-05; source msha-controller-operator-history
- **controller_controls_operator:** Kestner Graham & Leroy Malicote → Kestner Coal Company; 1979-07-01 to 1980-06-05; source msha-controller-operator-history
- **operator_operates_mine:** Mount Vernon Mining Inc → No 1 Surface; 1980-06-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rogers Lynn G → No 1 Surface; 1980-06-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rogers Lynn G → Mount Vernon Mining Inc; 1980-06-06 to current/open; source msha-controller-operator-history