# Relationship history for MSHA mine 1512249

Current hierarchy: **Gary A  Endicott → M & E Coal Inc → No 2 Dredge**

- 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:** Kyova Coal & Sand Ltd → No 2 Dredge; 1980-02-01 to 1987-03-05; source msha-controller-operator-history
- **controller_controls_mine:** Mc Sweeney L H--Robert Mc Hugh Et Al → No 2 Dredge; 1980-02-01 to 1987-03-05; source msha-controller-operator-history
- **controller_controls_operator:** Mc Sweeney L H--Robert Mc Hugh Et Al → Kyova Coal & Sand Ltd; 1980-02-01 to 1987-03-05; source msha-controller-operator-history
- **operator_operates_mine:** Dredgeco Inc → No 2 Dredge; 1987-03-06 to 1995-03-05; source msha-controller-operator-history
- **controller_controls_mine:** Vinson Charles → No 2 Dredge; 1987-03-06 to 1995-03-05; source msha-controller-operator-history
- **controller_controls_operator:** Vinson Charles → Dredgeco Inc; 1987-03-06 to 1995-03-05; source msha-controller-operator-history
- **operator_operates_mine:** M & E Coal Inc → No 2 Dredge; 1995-03-06 to 2001-02-15; source msha-controller-operator-history
- **controller_controls_mine:** Paul K  Maynard → No 2 Dredge; 1995-03-06 to 2001-02-15; source msha-controller-operator-history
- **controller_controls_operator:** Paul K  Maynard → M & E Coal Inc; 1995-03-06 to 2001-02-15; source msha-controller-operator-history
- **operator_operates_mine:** M & E Coal Inc → No 2 Dredge; 2001-02-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gary A  Endicott → No 2 Dredge; 2001-02-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary A  Endicott → M & E Coal Inc; 2001-02-16 to current/open; source msha-controller-operator-history