# Relationship history for MSHA mine 4607508

Current hierarchy: **Addair Darlene → D & E Resources Inc → Mine No 1**

- 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:** Kanon Inc → Mine No 1; 1988-05-01 to 1989-04-27; source msha-controller-operator-history
- **controller_controls_mine:** Philip T  Lambert → Mine No 1; 1988-05-01 to 1989-04-27; source msha-controller-operator-history
- **controller_controls_operator:** Philip T  Lambert → Kanon Inc; 1988-05-01 to 1989-04-27; source msha-controller-operator-history
- **operator_operates_mine:** Southfield Mining Company Inc → Mine No 1; 1989-04-28 to 1990-02-27; source msha-controller-operator-history
- **controller_controls_mine:** Bennett Bruce E → Mine No 1; 1989-04-28 to 1990-02-27; source msha-controller-operator-history
- **controller_controls_operator:** Bennett Bruce E → Southfield Mining Company Inc; 1989-04-28 to 1990-02-27; source msha-controller-operator-history
- **operator_operates_mine:** D & E Resources Inc → Mine No 1; 1990-02-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Addair Darlene Et Al → Mine No 1; 1990-02-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Addair Darlene Et Al → D & E Resources Inc; 1990-02-28 to current/open; source msha-controller-operator-history