# Relationship history for MSHA mine 0202753

Current hierarchy: **Cemex S A → CEMEX Construction Materials South LLC → CEMEX - WEST VALLEY**

- 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:** Mountain Valley Construction Company → CEMEX - WEST VALLEY; 1997-02-01 to 2000-03-07; source msha-controller-operator-history
- **controller_controls_mine:** Mark  Lloyd et al → CEMEX - WEST VALLEY; 1997-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Lloyd et al → Mountain Valley Construction Company; 1997-02-01 to 2000-03-07; source msha-controller-operator-history
- **controller_controls_operator:** Glenna  Lloyd et al → Mountain Valley Construction Company; 1997-02-01 to 2000-03-07; source msha-controller-operator-history
- **operator_operates_mine:** West Valley Sand & Gravel Inc → CEMEX - WEST VALLEY; 2000-03-08 to 2006-10-04; source msha-controller-operator-history
- **controller_controls_mine:** Kelly  Lloyd → CEMEX - WEST VALLEY; 2000-03-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kelly  Lloyd → West Valley Sand & Gravel Inc; 2000-03-08 to 2006-10-04; source msha-controller-operator-history
- **controller_controls_mine:** Rinker Group Ltd → CEMEX - WEST VALLEY; 2004-08-01 to 2007-07-09; source msha-controller-operator-history
- **operator_operates_mine:** West Valley Sand & Gravel Inc → CEMEX - WEST VALLEY; 2006-10-05 to 2008-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Rinker Group Ltd → West Valley Sand & Gravel Inc; 2006-10-05 to 2007-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → CEMEX - WEST VALLEY; 2007-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → West Valley Sand & Gravel Inc; 2007-07-10 to 2008-07-31; source msha-controller-operator-history
- **operator_operates_mine:** CEMEX Construction Materials South LLC → CEMEX - WEST VALLEY; 2008-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → CEMEX - WEST VALLEY; 2008-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → CEMEX Construction Materials South LLC; 2008-08-01 to current/open; source msha-controller-operator-history