# Relationship history for MSHA mine 4405899

Current hierarchy: **Ted  Osborne Jr → Shady Lane Coal Corp → No 2**

- 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

- **controller_controls_mine:** David M  Maynard → No 2; 1977-05-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ted  Osborne Jr → No 2; 1981-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mabo Coal Company Inc → No 2; 1982-06-01 to 1986-04-29; source msha-controller-operator-history
- **controller_controls_operator:** David M  Maynard → Mabo Coal Company Inc; 1982-06-01 to 1986-04-29; source msha-controller-operator-history
- **operator_operates_mine:** Shady Lane Coal Corp → No 2; 1986-04-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ted  Osborne Jr → Shady Lane Coal Corp; 1986-04-30 to current/open; source msha-controller-operator-history