# Relationship history for MSHA mine 4502244

Current hierarchy: **Charles C  Baker; Cathie  Walden → Greenbank Concrete & Aggregates → Greenbank, Inc.**

- 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:** Greenbank Sand & Gravel Company → Greenbank, Inc.; 1950-01-01 to 1989-04-28; source msha-controller-operator-history
- **controller_controls_mine:** Keith H  Wrightsman  et al → Greenbank, Inc.; 1950-01-01 to 1989-04-28; source msha-controller-operator-history
- **controller_controls_operator:** Keith H  Wrightsman  et al → Greenbank Sand & Gravel Company; 1950-01-01 to 1989-04-28; source msha-controller-operator-history
- **operator_operates_mine:** Greenbank Inc → Greenbank, Inc.; 1989-04-29 to 1992-01-09; source msha-controller-operator-history
- **controller_controls_mine:** James M  Mc Auliffe → Greenbank, Inc.; 1989-04-29 to 1992-01-09; source msha-controller-operator-history
- **controller_controls_operator:** James M  Mc Auliffe → Greenbank Inc; 1989-04-29 to 1992-01-09; source msha-controller-operator-history
- **operator_operates_mine:** Greenbank Inc → Greenbank, Inc.; 1992-01-10 to 2007-06-26; source msha-controller-operator-history
- **controller_controls_mine:** David B  Walden  et al → Greenbank, Inc.; 1992-01-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David B  Walden  et al → Greenbank Inc; 1992-01-10 to 2007-06-26; source msha-controller-operator-history
- **controller_controls_operator:** Edward L  Rempel  et al → Greenbank Inc; 1992-01-10 to 2007-06-26; source msha-controller-operator-history
- **operator_operates_mine:** Greenbank Concrete & Aggregates → Greenbank, Inc.; 2007-06-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Edward L  Rempel  et al → Greenbank, Inc.; 2007-06-27 to 2018-01-16; source msha-controller-operator-history
- **controller_controls_operator:** Edward L  Rempel  et al → Greenbank Concrete & Aggregates; 2007-06-27 to 2018-01-16; source msha-controller-operator-history
- **controller_controls_operator:** David B  Walden  et al → Greenbank Concrete & Aggregates; 2007-06-27 to 2018-01-16; source msha-controller-operator-history
- **controller_controls_mine:** Cathie  Walden et al → Greenbank, Inc.; 2018-01-17 to 2021-11-08; source msha-controller-operator-history
- **controller_controls_operator:** Cathie  Walden et al → Greenbank Concrete & Aggregates; 2018-01-17 to 2021-11-08; source msha-controller-operator-history
- **controller_controls_operator:** David B Walden et al → Greenbank Concrete & Aggregates; 2018-01-17 to 2021-11-08; source msha-controller-operator-history
- **controller_controls_mine:** Charles C  Baker et al → Greenbank, Inc.; 2021-11-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles C  Baker et al → Greenbank Concrete & Aggregates; 2021-11-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cathie  Walden et al → Greenbank Concrete & Aggregates; 2021-11-09 to current/open; source msha-controller-operator-history