# Relationship history for MSHA mine 1506352

Current hierarchy: **M Lynn  Parrish → Jaco Mining Company Inc → Mayking Tipple**

- 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:** Mayking Elkhorn Coal Sales → Mayking Tipple; 1950-01-01 to 1978-08-24; source msha-controller-operator-history
- **controller_controls_mine:** Webb Sam C & Conley → Mayking Tipple; 1950-01-01 to 1978-08-24; source msha-controller-operator-history
- **controller_controls_operator:** Webb Sam C & Conley → Mayking Elkhorn Coal Sales; 1950-01-01 to 1978-08-24; source msha-controller-operator-history
- **controller_controls_mine:** Johnson Hobart C → Mayking Tipple; 1971-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mayking Coal Company Inc → Mayking Tipple; 1978-08-25 to 1981-11-26; source msha-controller-operator-history
- **controller_controls_mine:** Collins Stamper → Mayking Tipple; 1978-08-25 to 1981-11-26; source msha-controller-operator-history
- **controller_controls_operator:** Collins Stamper → Mayking Coal Company Inc; 1978-08-25 to 1981-11-26; source msha-controller-operator-history
- **controller_controls_mine:** M Lynn  Parrish → Mayking Tipple; 1979-09-20 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Governor Elkhorn Coal Company Inc → Mayking Tipple; 1981-11-27 to 1984-04-23; source msha-controller-operator-history
- **controller_controls_operator:** Johnson Hobart C → Governor Elkhorn Coal Company Inc; 1981-11-27 to 1984-04-23; source msha-controller-operator-history
- **operator_operates_mine:** Jaco Mining Company Inc → Mayking Tipple; 1984-04-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** M Lynn  Parrish → Jaco Mining Company Inc; 1984-04-24 to current/open; source msha-controller-operator-history