# Relationship history for MSHA mine 4503099

Current hierarchy: **John L  Parker; A. Ann  Parker → Cunningham Crushing, Inc. → Cunningham Crushing, Inc**

- 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:** Cunningham Crushing → Cunningham Crushing, Inc; 1986-07-01 to 2005-02-08; source msha-controller-operator-history
- **controller_controls_mine:** L G  Cunningham → Cunningham Crushing, Inc; 1986-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** L G  Cunningham → Cunningham Crushing; 1986-07-01 to 2005-02-08; source msha-controller-operator-history
- **operator_operates_mine:** Cunningham Crushing, Inc. → Cunningham Crushing, Inc; 2005-02-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John L  Parker et al → Cunningham Crushing, Inc; 2005-02-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John L  Parker et al → Cunningham Crushing, Inc.; 2005-02-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** A. Ann  Parker et al → Cunningham Crushing, Inc.; 2005-02-09 to current/open; source msha-controller-operator-history