# Relationship history for MSHA mine 2302038

Current hierarchy: **Bobby E Laughlin → Mid County  Materials LLC → Mid County Materials LLC**

- 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:** Buckhorn Sand & Gravel → Mid County Materials LLC; 1991-04-01 to 1996-02-12; source msha-controller-operator-history
- **controller_controls_mine:** J J  Williams → Mid County Materials LLC; 1991-04-01 to 1996-02-12; source msha-controller-operator-history
- **controller_controls_operator:** J J  Williams → Buckhorn Sand & Gravel; 1991-04-01 to 1996-02-12; source msha-controller-operator-history
- **operator_operates_mine:** I 44 Sand & Gravel Inc → Mid County Materials LLC; 1996-02-13 to 1997-05-14; source msha-controller-operator-history
- **controller_controls_mine:** Chris  Paterson → Mid County Materials LLC; 1996-02-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chris  Paterson → I 44 Sand & Gravel Inc; 1996-02-13 to 1997-05-14; source msha-controller-operator-history
- **operator_operates_mine:** Laughlin & Sons Limited → Mid County Materials LLC; 1997-05-15 to 2005-02-08; source msha-controller-operator-history
- **controller_controls_mine:** Bill  Laughlin et al → Mid County Materials LLC; 1997-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bill  Laughlin et al → Laughlin & Sons Limited; 1997-05-15 to 2005-02-08; source msha-controller-operator-history
- **controller_controls_operator:** Bobby  Laughlin et al → Laughlin & Sons Limited; 1997-05-15 to 2005-02-08; source msha-controller-operator-history
- **operator_operates_mine:** Mid County Sand & Gravel Inc → Mid County Materials LLC; 2005-02-09 to 2007-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Bobby E Laughlin → Mid County Materials LLC; 2005-02-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bobby E Laughlin → Mid County Sand & Gravel Inc; 2005-02-09 to 2007-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Mid County  Materials LLC → Mid County Materials LLC; 2008-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bobby E Laughlin → Mid County Materials LLC; 2008-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bobby E Laughlin → Mid County  Materials LLC; 2008-01-01 to current/open; source msha-controller-operator-history