# Relationship history for MSHA mine 3301400

Current hierarchy: **Ronald E  Watson → Mecco Inc → Mecco Incorporated**

- 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:** Mecco Inc → Mecco Incorporated; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David T  Morgan → Mecco Incorporated; 1950-01-01 to 2005-05-17; source msha-controller-operator-history
- **controller_controls_operator:** David T  Morgan → Mecco Inc; 1950-01-01 to 2005-05-17; source msha-controller-operator-history
- **controller_controls_mine:** Ronald E  Watson → Mecco Incorporated; 2005-05-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronald E  Watson → Mecco Inc; 2005-05-18 to current/open; source msha-controller-operator-history