# Relationship history for MSHA mine 1513194

Current hierarchy: **Surgener Lonnie → Lon-Ray Corp → Number 1**

- 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:** Surgener Lonnie → Number 1; 1975-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** M K & D Coal Company → Number 1; 1981-11-01 to 1982-06-14; source msha-controller-operator-history
- **controller_controls_mine:** Messer Blaine--Mike Daniels Et Al → Number 1; 1981-11-01 to 1982-06-14; source msha-controller-operator-history
- **controller_controls_operator:** Messer Blaine--Mike Daniels Et Al → M K & D Coal Company; 1981-11-01 to 1982-06-14; source msha-controller-operator-history
- **operator_operates_mine:** Lon-Ray Corp → Number 1; 1982-06-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Surgener Lonnie → Lon-Ray Corp; 1982-06-15 to current/open; source msha-controller-operator-history