# Relationship history for MSHA mine 4503526

Current hierarchy: **Corey L  Johnson; William L  Massey → Island Property Mangement → Lindell Pit**

- 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:** Island Property Management → Lindell Pit; 2003-02-04 to 2012-10-02; source msha-controller-operator-history
- **controller_controls_mine:** William L  Massey et al → Lindell Pit; 2003-02-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William L  Massey et al → Island Property Management; 2003-02-04 to 2012-10-02; source msha-controller-operator-history
- **controller_controls_operator:** Corey L  Johnson et al → Island Property Management; 2003-02-04 to 2012-10-02; source msha-controller-operator-history
- **operator_operates_mine:** C Johnson Construction, Inc. → Lindell Pit; 2012-10-03 to 2015-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Corey L  Johnson → Lindell Pit; 2012-10-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Corey L  Johnson → C Johnson Construction, Inc.; 2012-10-03 to 2015-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Island Property Mangement → Lindell Pit; 2015-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Corey L  Johnson et al → Island Property Mangement; 2015-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William L  Massey et al → Island Property Mangement; 2015-02-01 to current/open; source msha-controller-operator-history