# Relationship history for MSHA mine 4605613

Current hierarchy: **Ashland Inc → Hugheston Dock Company → Tripp 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

- **controller_controls_mine:** Ashland Inc et al → Tripp Tipple; 1976-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Addington Brothers Mining Inc → Tripp Tipple; 1977-08-01 to 1980-07-15; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc et al → Addington Brothers Mining Inc; 1977-08-01 to 1980-07-15; source msha-controller-operator-history
- **operator_operates_mine:** Consolidated Energy Inc → Tripp Tipple; 1980-07-16 to 1981-12-10; source msha-controller-operator-history
- **controller_controls_mine:** Hall Ken L → Tripp Tipple; 1980-07-16 to 1981-12-10; source msha-controller-operator-history
- **controller_controls_operator:** Hall Ken L → Consolidated Energy Inc; 1980-07-16 to 1981-12-10; source msha-controller-operator-history
- **operator_operates_mine:** Hugheston Dock Company → Tripp Tipple; 1981-12-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ashland Inc et al → Tripp Tipple; 1981-12-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc et al → Hugheston Dock Company; 1981-12-11 to current/open; source msha-controller-operator-history