# Relationship history for MSHA mine 0300158

Current hierarchy: **Hurley Sterlin → Hurley Enterprises Inc → Hays Chapel No 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:** Prairie Coal Company Inc → Hays Chapel No 1; 1950-01-01 to 1978-05-07; source msha-controller-operator-history
- **controller_controls_mine:** Hurley Sterlin → Hays Chapel No 1; 1950-01-01 to 1978-05-07; source msha-controller-operator-history
- **controller_controls_operator:** Hurley Sterlin → Prairie Coal Company Inc; 1950-01-01 to 1978-05-07; source msha-controller-operator-history
- **operator_operates_mine:** Hays Chapel Coal Corp → Hays Chapel No 1; 1978-05-08 to 1980-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Bluegrass Resources Corp → Hays Chapel No 1; 1978-05-08 to 1980-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Bluegrass Resources Corp → Hays Chapel Coal Corp; 1978-05-08 to 1980-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Hurley Enterprises Inc → Hays Chapel No 1; 1980-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hurley Sterlin → Hays Chapel No 1; 1980-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hurley Sterlin → Hurley Enterprises Inc; 1980-06-01 to current/open; source msha-controller-operator-history