# Relationship history for MSHA mine 4607303

Current hierarchy: **Jabbalux S A → Cowaco Inc → Taylor Creek Refuse Pile**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Cowaco Inc → Taylor Creek Refuse Pile; 1987-03-01 to 1988-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Chemetco → Taylor Creek Refuse Pile; 1987-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chemetco → Cowaco Inc; 1987-03-01 to 1988-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Cowaco Inc → Taylor Creek Refuse Pile; 1989-01-01 to 1990-10-28; source msha-controller-operator-history
- **controller_controls_mine:** Jabbalux S A → Taylor Creek Refuse Pile; 1989-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jabbalux S A → Cowaco Inc; 1989-01-01 to 1990-10-28; source msha-controller-operator-history
- **operator_operates_mine:** Kelrai Inc → Taylor Creek Refuse Pile; 1990-10-29 to 1991-01-07; source msha-controller-operator-history
- **controller_controls_mine:** Spiller Gary → Taylor Creek Refuse Pile; 1990-10-29 to 1991-01-07; source msha-controller-operator-history
- **controller_controls_operator:** Spiller Gary → Kelrai Inc; 1990-10-29 to 1991-01-07; source msha-controller-operator-history
- **operator_operates_mine:** Cowaco Inc → Taylor Creek Refuse Pile; 1991-01-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jabbalux S A → Cowaco Inc; 1991-01-08 to current/open; source msha-controller-operator-history