# Relationship history for MSHA mine 0202253

Current hierarchy: **UNACEM Corp S A A → Sunshine Concrete & Materials Inc → Fort Mohave 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

- **controller_controls_mine:** Quinto  Polidori → Fort Mohave Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mohave Concrete & Materials Inc → Fort Mohave Pit; 1985-05-01 to 1997-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Quinto  Polidori → Mohave Concrete & Materials Inc; 1985-05-01 to 1997-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Mohave Concrete & Materials Inc. → Fort Mohave Pit; 1997-05-01 to 2002-05-29; source msha-controller-operator-history
- **controller_controls_mine:** U S Aggregate Inc → Fort Mohave Pit; 1997-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** U S Aggregate Inc → Mohave Concrete & Materials Inc.; 1997-05-01 to 2002-05-29; source msha-controller-operator-history
- **controller_controls_mine:** Quinto  Polidori → Fort Mohave Pit; 2002-01-17 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sunshine Concrete & Materials Inc → Fort Mohave Pit; 2002-05-30 to 2005-01-30; source msha-controller-operator-history
- **controller_controls_operator:** Quinto  Polidori → Sunshine Concrete & Materials Inc; 2002-05-30 to 2005-01-30; source msha-controller-operator-history
- **operator_operates_mine:** Sunshine Concrete & Materials Inc → Fort Mohave Pit; 2005-01-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joel D  Schneyer et al → Fort Mohave Pit; 2005-01-31 to 2007-07-08; source msha-controller-operator-history
- **controller_controls_operator:** Joel D  Schneyer et al → Sunshine Concrete & Materials Inc; 2005-01-31 to 2007-07-08; source msha-controller-operator-history
- **controller_controls_operator:** John N  Stoss et al → Sunshine Concrete & Materials Inc; 2005-01-31 to 2007-07-08; source msha-controller-operator-history
- **controller_controls_mine:** ARPL Tecnolgia Industrial S A → Fort Mohave Pit; 2007-07-09 to 2013-04-14; source msha-controller-operator-history
- **controller_controls_operator:** ARPL Tecnolgia Industrial S A → Sunshine Concrete & Materials Inc; 2007-07-09 to 2013-04-14; source msha-controller-operator-history
- **controller_controls_mine:** UNACEM Corp S A A → Fort Mohave Pit; 2013-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** UNACEM Corp S A A → Sunshine Concrete & Materials Inc; 2013-04-15 to current/open; source msha-controller-operator-history