# Relationship history for MSHA mine 4104827

Current hierarchy: **Peter R  Dawson → P&K Stone LLC → Chico 2 Quarry**

- 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:** Cemex S A → Chico 2 Quarry; 2008-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Blue Star Materials LLC → Chico 2 Quarry; 2010-05-25 to 2013-07-02; source msha-controller-operator-history
- **controller_controls_mine:** John  Loftus et al → Chico 2 Quarry; 2010-05-25 to 2013-01-01; source msha-controller-operator-history
- **controller_controls_operator:** John  Loftus et al → Blue Star Materials LLC; 2010-05-25 to 2013-01-01; source msha-controller-operator-history
- **controller_controls_operator:** Steve  Loftus et al → Blue Star Materials LLC; 2010-05-25 to 2013-01-01; source msha-controller-operator-history
- **controller_controls_mine:** John W.  Cathey et al → Chico 2 Quarry; 2013-01-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John W.  Cathey et al → Blue Star Materials LLC; 2013-01-02 to 2013-07-02; source msha-controller-operator-history
- **controller_controls_operator:** Western Aggregates LLC et al → Blue Star Materials LLC; 2013-01-02 to 2013-07-02; source msha-controller-operator-history
- **operator_operates_mine:** Blue Star Materials II LLC → Chico 2 Quarry; 2013-07-03 to 2018-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Jack  Dowdy → Chico 2 Quarry; 2013-07-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jack  Dowdy → Blue Star Materials II LLC; 2013-07-03 to 2018-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Peter R  Dawson → Chico 2 Quarry; 2015-03-25 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cemex Construction Materials South, LLC → Chico 2 Quarry; 2018-09-01 to 2023-03-02; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Cemex Construction Materials South, LLC; 2018-09-01 to 2023-03-02; source msha-controller-operator-history
- **operator_operates_mine:** P&K Stone LLC → Chico 2 Quarry; 2023-03-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Peter R  Dawson → P&K Stone LLC; 2023-03-03 to current/open; source msha-controller-operator-history