# Relationship history for MSHA mine 1509588

Current hierarchy: **Skeens Lonnie & Foster Adkins → Leah Coal Company Inc → 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:** Wayne Meriah Coal Company Inc → No 1; 1976-03-26 to 1977-05-16; source msha-controller-operator-history
- **controller_controls_mine:** Bailey Denver → No 1; 1976-03-26 to 1977-05-16; source msha-controller-operator-history
- **controller_controls_operator:** Bailey Denver → Wayne Meriah Coal Company Inc; 1976-03-26 to 1977-05-16; source msha-controller-operator-history
- **operator_operates_mine:** Bailey & Deel Mining Corp → No 1; 1977-05-17 to 1986-09-25; source msha-controller-operator-history
- **controller_controls_mine:** Bailey Toby & Teddy Et Al → No 1; 1977-05-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bailey Toby & Teddy Et Al → Bailey & Deel Mining Corp; 1977-05-17 to 1986-09-25; source msha-controller-operator-history
- **operator_operates_mine:** Leah Coal Company Inc → No 1; 1986-09-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Skeens Lonnie & Foster Adkins → No 1; 1986-09-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Skeens Lonnie & Foster Adkins → Leah Coal Company Inc; 1986-09-26 to current/open; source msha-controller-operator-history