# Relationship history for MSHA mine 0102732

Current hierarchy: **William D  McWane; C Phillip  McWane → Mc Wane Inc → Early Ridge Mine**

- 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:** Coal Auger Systems Inc → Early Ridge Mine; 1987-06-01 to 1988-03-20; source msha-controller-operator-history
- **controller_controls_mine:** Gardiner Rex R → Early Ridge Mine; 1987-06-01 to 1988-03-20; source msha-controller-operator-history
- **controller_controls_operator:** Gardiner Rex R → Coal Auger Systems Inc; 1987-06-01 to 1988-03-20; source msha-controller-operator-history
- **operator_operates_mine:** Contract Augering Services Inc → Early Ridge Mine; 1988-03-21 to 1993-07-14; source msha-controller-operator-history
- **controller_controls_mine:** Bailey Darryl Et Al → Early Ridge Mine; 1988-03-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bailey Darryl Et Al → Contract Augering Services Inc; 1988-03-21 to 1993-07-14; source msha-controller-operator-history
- **operator_operates_mine:** Mc Wane Inc → Early Ridge Mine; 1993-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James  McWane et al → Early Ridge Mine; 1993-07-15 to 2021-02-07; source msha-controller-operator-history
- **controller_controls_operator:** James  McWane et al → Mc Wane Inc; 1993-07-15 to 2021-02-07; source msha-controller-operator-history
- **controller_controls_mine:** William D  McWane et al → Early Ridge Mine; 2021-02-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William D  McWane et al → Mc Wane Inc; 2021-02-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** C Phillip  McWane et al → Mc Wane Inc; 2021-02-08 to current/open; source msha-controller-operator-history