# Relationship history for MSHA mine 4400893

Current hierarchy: **Harris Frank → Harper Valley Coal Company Inc → Mine #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

- **operator_operates_mine:** H M Mc Glothlin Coal Company Inc → Mine #1; 1950-01-01 to 1971-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Mc Glothlin Henry M → Mine #1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Glothlin Henry M → H M Mc Glothlin Coal Company Inc; 1950-01-01 to 1971-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Harper Valley Coal Company Inc → Mine #1; 1972-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Harris Frank → Mine #1; 1972-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harris Frank → Harper Valley Coal Company Inc; 1972-01-01 to current/open; source msha-controller-operator-history