# Relationship history for MSHA mine 0202181

Current hierarchy: **Taiheiyo Cement Corp → CalPortland Company → AGUA FRIA 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:** Padilla Sand & Gravel Redi-Mix Inc → AGUA FRIA PIT; 1983-11-01 to 2005-08-28; source msha-controller-operator-history
- **controller_controls_mine:** Padilla Manuel Jr Et Al → AGUA FRIA PIT; 1983-11-01 to 2003-12-16; source msha-controller-operator-history
- **controller_controls_operator:** Padilla Manuel Jr Et Al → Padilla Sand & Gravel Redi-Mix Inc; 1983-11-01 to 2003-12-16; source msha-controller-operator-history
- **controller_controls_mine:** Taiheiyo Cement Corp → AGUA FRIA PIT; 1990-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** RMC Group PLC → AGUA FRIA PIT; 2003-12-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** RMC Group PLC → Padilla Sand & Gravel Redi-Mix Inc; 2003-12-17 to 2005-08-28; source msha-controller-operator-history
- **operator_operates_mine:** CPC Southwest Materials Inc → AGUA FRIA PIT; 2005-08-29 to 2008-08-27; source msha-controller-operator-history
- **controller_controls_mine:** Taiheiyo Cement Corp → AGUA FRIA PIT; 2005-08-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Taiheiyo Cement Corp → CPC Southwest Materials Inc; 2005-08-29 to 2008-08-27; source msha-controller-operator-history
- **operator_operates_mine:** CalPortland Company → AGUA FRIA PIT; 2008-08-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Taiheiyo Cement Corp → CalPortland Company; 2008-08-28 to current/open; source msha-controller-operator-history