# Relationship history for MSHA mine 1510350

Current hierarchy: **M Lynn  Parrish → Jaco Mining Company Inc → Coal Mac No 1 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Steamco Inc → Coal Mac No 1 Tipple; 1977-03-01 to 1980-02-11; source msha-controller-operator-history
- **controller_controls_mine:** Mc Namee Gerald T → Coal Mac No 1 Tipple; 1977-03-01 to 1980-02-11; source msha-controller-operator-history
- **controller_controls_operator:** Mc Namee Gerald T → Steamco Inc; 1977-03-01 to 1980-02-11; source msha-controller-operator-history
- **controller_controls_mine:** M Lynn  Parrish → Coal Mac No 1 Tipple; 1979-09-20 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Jaco Mining Company Inc → Coal Mac No 1 Tipple; 1980-02-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** M Lynn  Parrish → Jaco Mining Company Inc; 1980-02-12 to current/open; source msha-controller-operator-history