# Relationship history for MSHA mine 4603326

Current hierarchy: **Skaggs Henry Jr & Ballard Counts → Holiday Branch Coal Company → No 2 Mine**

- 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:** Low Ash Inc → No 2 Mine; 1950-01-01 to 1974-01-29; source msha-controller-operator-history
- **controller_controls_mine:** Gould Inc → No 2 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gould Inc → Low Ash Inc; 1950-01-01 to 1974-01-29; source msha-controller-operator-history
- **operator_operates_mine:** Holiday Branch Coal Company → No 2 Mine; 1974-01-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Skaggs Henry Jr & Ballard Counts → No 2 Mine; 1974-01-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Skaggs Henry Jr & Ballard Counts → Holiday Branch Coal Company; 1974-01-30 to current/open; source msha-controller-operator-history