# Relationship history for MSHA mine 0202913

Current hierarchy: **Arthur C  Mc Mains → Arrowhead Mining & Materials LLC → Chino 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:** Central Mountain Materials Llc → Chino Pit; 2000-06-01 to 2001-04-05; source msha-controller-operator-history
- **controller_controls_mine:** Gary  Mortimer  et al → Chino Pit; 2000-06-01 to 2001-04-05; source msha-controller-operator-history
- **controller_controls_operator:** Gary  Mortimer  et al → Central Mountain Materials Llc; 2000-06-01 to 2001-04-05; source msha-controller-operator-history
- **operator_operates_mine:** Arrowhead Mining & Materials LLC → Chino Pit; 2001-04-06 to 2007-07-17; source msha-controller-operator-history
- **controller_controls_mine:** Arthur C  Mc Mains → Chino Pit; 2001-04-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arthur C  Mc Mains → Arrowhead Mining & Materials LLC; 2001-04-06 to 2007-07-17; source msha-controller-operator-history
- **controller_controls_mine:** McCormick Inc → Chino Pit; 2004-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Arrowhead Materials → Chino Pit; 2007-07-18 to 2012-12-30; source msha-controller-operator-history
- **controller_controls_operator:** McCormick Inc → Arrowhead Materials; 2007-07-18 to 2012-12-30; source msha-controller-operator-history
- **operator_operates_mine:** Arrowhead Mining & Materials LLC → Chino Pit; 2012-12-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arthur C  Mc Mains → Arrowhead Mining & Materials LLC; 2012-12-31 to current/open; source msha-controller-operator-history