# Relationship history for MSHA mine 4405128

Current hierarchy: **Pittston Company → Clinchfield Coal Company → Austin Creek 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Pittston Company → Austin Creek No 2 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Big Ten No 3 Inc → Austin Creek No 2 Mine; 1978-10-23 to 1980-01-20; source msha-controller-operator-history
- **controller_controls_mine:** Elkins William T → Austin Creek No 2 Mine; 1978-10-23 to 1980-01-20; source msha-controller-operator-history
- **controller_controls_operator:** Elkins William T → Big Ten No 3 Inc; 1978-10-23 to 1980-01-20; source msha-controller-operator-history
- **operator_operates_mine:** Clinchfield Coal Company → Austin Creek No 2 Mine; 1980-01-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pittston Company → Clinchfield Coal Company; 1980-01-21 to current/open; source msha-controller-operator-history