# Relationship history for MSHA mine 4001127

Current hierarchy: **Potter H Paul → Potter Mining Company Inc → 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Custom Coal & Building Products Corp → No 1 Tipple; 1950-01-01 to 1980-02-24; source msha-controller-operator-history
- **controller_controls_mine:** Waters S J → No 1 Tipple; 1950-01-01 to 1980-02-24; source msha-controller-operator-history
- **controller_controls_operator:** Waters S J → Custom Coal & Building Products Corp; 1950-01-01 to 1980-02-24; source msha-controller-operator-history
- **operator_operates_mine:** Potter Mining Company Inc → No 1 Tipple; 1980-02-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Potter H Paul Et Al → No 1 Tipple; 1980-02-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Potter H Paul Et Al → Potter Mining Company Inc; 1980-02-25 to current/open; source msha-controller-operator-history