# Relationship history for MSHA mine 1202027

Current hierarchy: **Fred (Pete)  Irving → IMI Aggregates LLC → IMI Greenwood Sand & Gravel**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Fred (Pete)  Irving → IMI Greenwood Sand & Gravel; 1950-01-01 to 2005-12-04; source msha-controller-operator-history
- **operator_operates_mine:** Barb'S Sand Gravel & Topsoil → IMI Greenwood Sand & Gravel; 1988-07-01 to 1992-05-31; source msha-controller-operator-history
- **controller_controls_mine:** William  Cox → IMI Greenwood Sand & Gravel; 1988-07-01 to 1992-05-31; source msha-controller-operator-history
- **controller_controls_operator:** William  Cox → Barb'S Sand Gravel & Topsoil; 1988-07-01 to 1992-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Irving Materials Inc → IMI Greenwood Sand & Gravel; 1992-06-01 to 2020-09-07; source msha-controller-operator-history
- **controller_controls_operator:** Fred (Pete)  Irving → Irving Materials Inc; 1992-06-01 to 2005-12-04; source msha-controller-operator-history
- **controller_controls_mine:** Earl  Brinker et al → IMI Greenwood Sand & Gravel; 2005-12-05 to 2018-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Earl  Brinker et al → Irving Materials Inc; 2005-12-05 to 2018-12-31; source msha-controller-operator-history
- **controller_controls_mine:** John  Tiberi → IMI Greenwood Sand & Gravel; 2019-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Tiberi → Irving Materials Inc; 2019-01-01 to 2020-09-07; source msha-controller-operator-history
- **operator_operates_mine:** IMI Aggregates LLC → IMI Greenwood Sand & Gravel; 2020-09-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Fred (Pete)  Irving → IMI Greenwood Sand & Gravel; 2020-09-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fred (Pete)  Irving → IMI Aggregates LLC; 2020-09-08 to current/open; source msha-controller-operator-history