# Relationship history for MSHA mine 0405638

Current hierarchy: **Eric  Werner; Pat  Broyles → CHANDLER AGGREGATES INC → NICHOLS ROAD 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

- **controller_controls_mine:** David H  Murdock → NICHOLS ROAD PIT; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jim  Broyles et al → NICHOLS ROAD PIT; 1995-01-07 to 2017-03-09; source msha-controller-operator-history
- **operator_operates_mine:** Pacific Clay Products, Inc. → NICHOLS ROAD PIT; 2005-04-16 to 2007-01-14; source msha-controller-operator-history
- **controller_controls_operator:** David H  Murdock → Pacific Clay Products, Inc.; 2005-04-16 to 2007-01-14; source msha-controller-operator-history
- **controller_controls_mine:** David H  Murdock → NICHOLS ROAD PIT; 2005-04-16 to 2025-06-09; source msha-controller-operator-history
- **operator_operates_mine:** Pacific Aggregates Inc → NICHOLS ROAD PIT; 2007-01-15 to 2013-12-22; source msha-controller-operator-history
- **controller_controls_operator:** David H  Murdock → Pacific Aggregates Inc; 2007-01-15 to 2013-12-22; source msha-controller-operator-history
- **operator_operates_mine:** Chandler Aggregates Inc → NICHOLS ROAD PIT; 2013-12-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jim  Broyles et al → Chandler Aggregates Inc; 2013-12-23 to 2017-03-09; source msha-controller-operator-history
- **controller_controls_mine:** Pat  Broyles et al → NICHOLS ROAD PIT; 2017-03-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pat  Broyles et al → Chandler Aggregates Inc; 2017-03-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eric  Werner et al → Chandler Aggregates Inc; 2017-03-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David Murdock Living Trust → NICHOLS ROAD PIT; 2025-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David Murdock Living Trust → Pacific Aggregates Inc; 2025-06-10 to 2013-12-22; source msha-controller-operator-history