# Relationship history for MSHA mine 0402261

Current hierarchy: **Vulcan Materials Company → CalMat Co → PILARCITOS 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

- **operator_operates_mine:** Lone Star Industries Inc → PILARCITOS QUARRY; 1950-01-01 to 1981-11-05; source msha-controller-operator-history
- **controller_controls_mine:** Lone Star Industries Inc → PILARCITOS QUARRY; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lone Star Industries Inc → Lone Star Industries Inc; 1950-01-01 to 1981-11-05; source msha-controller-operator-history
- **controller_controls_mine:** Felix H  Siri → PILARCITOS QUARRY; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Piombo Corp → PILARCITOS QUARRY; 1981-11-06 to 1984-06-14; source msha-controller-operator-history
- **controller_controls_operator:** Felix H  Siri → Piombo Corp; 1981-11-06 to 1984-06-14; source msha-controller-operator-history
- **operator_operates_mine:** Piombo Corp → PILARCITOS QUARRY; 1984-06-15 to 1986-06-20; source msha-controller-operator-history
- **controller_controls_mine:** Centennial Savings & Loan Association → PILARCITOS QUARRY; 1984-06-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Centennial Savings & Loan Association → Piombo Corp; 1984-06-15 to 1986-06-20; source msha-controller-operator-history
- **operator_operates_mine:** Piombo Construction Company → PILARCITOS QUARRY; 1986-06-21 to 1992-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Felix H  Siri → PILARCITOS QUARRY; 1986-06-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Felix H  Siri → Piombo Construction Company; 1986-06-21 to 1992-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Eucon Corporation → PILARCITOS QUARRY; 1989-12-15 to 2008-10-05; source msha-controller-operator-history
- **operator_operates_mine:** Pilarcitos Quarry → PILARCITOS QUARRY; 1992-09-01 to 1993-01-17; source msha-controller-operator-history
- **controller_controls_mine:** Dean  Rasmussen et al → PILARCITOS QUARRY; 1992-09-01 to 1993-01-17; source msha-controller-operator-history
- **controller_controls_operator:** Dean  Rasmussen et al → Pilarcitos Quarry; 1992-09-01 to 1993-01-17; source msha-controller-operator-history
- **operator_operates_mine:** West Coast Aggregates, Inc → PILARCITOS QUARRY; 1993-01-18 to 2014-07-29; source msha-controller-operator-history
- **controller_controls_operator:** Eucon Corporation → West Coast Aggregates, Inc; 1993-01-18 to 2008-10-05; source msha-controller-operator-history
- **controller_controls_mine:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → PILARCITOS QUARRY; 1999-01-06 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → PILARCITOS QUARRY; 2007-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Richard O DeAtley et al → PILARCITOS QUARRY; 2008-10-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard O DeAtley et al → West Coast Aggregates, Inc; 2008-10-06 to 2014-07-29; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge North America Inc. et al → West Coast Aggregates, Inc; 2008-10-06 to 2014-07-29; source msha-controller-operator-history
- **controller_controls_operator:** Neal  DeAtley et al → West Coast Aggregates, Inc; 2008-10-06 to 2014-07-29; source msha-controller-operator-history
- **operator_operates_mine:** CalMat Co → PILARCITOS QUARRY; 2014-07-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → CalMat Co; 2014-07-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → CalMat Co; 2014-07-30 to 2007-11-15; source msha-controller-operator-history