# Relationship history for MSHA mine 3600064

Current hierarchy: **James J  Anderson → Dyer Quarry Inc → Dyer Quarry 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:** John T Dyer Quarry Company → Dyer Quarry Inc; 1950-01-01 to 1990-07-19; source msha-controller-operator-history
- **controller_controls_mine:** Warner Company → Dyer Quarry Inc; 1950-01-01 to 1990-07-19; source msha-controller-operator-history
- **controller_controls_operator:** Warner Company → John T Dyer Quarry Company; 1950-01-01 to 1990-07-19; source msha-controller-operator-history
- **operator_operates_mine:** John T Dyer Quarry Company-Div/Warner Company → Dyer Quarry Inc; 1990-07-20 to 1999-03-18; source msha-controller-operator-history
- **controller_controls_mine:** Wmx Technologies Inc → Dyer Quarry Inc; 1990-07-20 to 1999-03-18; source msha-controller-operator-history
- **controller_controls_operator:** Wmx Technologies Inc → John T Dyer Quarry Company-Div/Warner Company; 1990-07-20 to 1999-03-18; source msha-controller-operator-history
- **operator_operates_mine:** Dyer Quarry Inc → Dyer Quarry Inc; 1999-03-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James J  Anderson → Dyer Quarry Inc; 1999-03-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James J  Anderson → Dyer Quarry Inc; 1999-03-19 to current/open; source msha-controller-operator-history