# Relationship history for MSHA mine 1510196

Current hierarchy: **Massey Energy Company → Clark Elkhorn Coal Company Inc → Clark No 5 Tipple**

- 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:** C S & S Coal Company → Clark No 5 Tipple; 1977-02-01 to 1977-06-23; source msha-controller-operator-history
- **controller_controls_mine:** Salyer Hersel & Billy R--Donald Coleman → Clark No 5 Tipple; 1977-02-01 to 1977-06-23; source msha-controller-operator-history
- **controller_controls_operator:** Salyer Hersel & Billy R--Donald Coleman → C S & S Coal Company; 1977-02-01 to 1977-06-23; source msha-controller-operator-history
- **operator_operates_mine:** Triple T Coal Company Inc → Clark No 5 Tipple; 1977-06-24 to 1981-02-22; source msha-controller-operator-history
- **controller_controls_mine:** Taylor Carl H → Clark No 5 Tipple; 1977-06-24 to 1981-02-22; source msha-controller-operator-history
- **controller_controls_operator:** Taylor Carl H → Triple T Coal Company Inc; 1977-06-24 to 1981-02-22; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → Clark No 5 Tipple; 1979-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Triple T Coal Company Inc → Clark No 5 Tipple; 1981-02-23 to 1983-02-17; source msha-controller-operator-history
- **controller_controls_mine:** M Lynn  Parrish → Clark No 5 Tipple; 1981-02-23 to 1983-02-17; source msha-controller-operator-history
- **controller_controls_operator:** M Lynn  Parrish → Triple T Coal Company Inc; 1981-02-23 to 1983-02-17; source msha-controller-operator-history
- **operator_operates_mine:** Clark Elkhorn Coal Company Inc → Clark No 5 Tipple; 1983-02-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Clark Elkhorn Coal Company Inc; 1983-02-18 to current/open; source msha-controller-operator-history