# Relationship history for MSHA mine 3502986

Current hierarchy: **CRH PLC → American Rock Products Inc → Mission 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:** A J  Urbanek → Mission Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rogers Construction Inc → Mission Pit; 1980-01-01 to 1981-01-31; source msha-controller-operator-history
- **controller_controls_operator:** A J  Urbanek → Rogers Construction Inc; 1980-01-01 to 1981-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Pendleton Ready Mix Company → Mission Pit; 1981-02-01 to 1987-05-14; source msha-controller-operator-history
- **controller_controls_mine:** Lawrence  Boltz et al → Mission Pit; 1981-02-01 to 1987-05-14; source msha-controller-operator-history
- **controller_controls_operator:** Lawrence  Boltz et al → Pendleton Ready Mix Company; 1981-02-01 to 1987-05-14; source msha-controller-operator-history
- **operator_operates_mine:** Pendleton Ready Mix Inc → Mission Pit; 1987-05-15 to 2019-05-30; source msha-controller-operator-history
- **controller_controls_mine:** Jayne L  Clarke et al → Mission Pit; 1987-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jayne L  Clarke et al → Pendleton Ready Mix Inc; 1987-05-15 to 2019-05-30; source msha-controller-operator-history
- **controller_controls_operator:** Terry L  Clarke et al → Pendleton Ready Mix Inc; 1987-05-15 to 2019-05-30; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Mission Pit; 1987-09-18 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** American Rock Products Inc → Mission Pit; 2019-05-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → American Rock Products Inc; 2019-05-31 to current/open; source msha-controller-operator-history