# Relationship history for MSHA mine 4002340

Current hierarchy: **Asbury Harold F → Eagle Mining Company Inc → No 1 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

- **controller_controls_mine:** Asbury Harold F Et Al → No 1 Mine; 1977-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rainbow Mining Company Inc → No 1 Mine; 1977-10-01 to 1978-04-04; source msha-controller-operator-history
- **controller_controls_operator:** Asbury Harold F Et Al → Rainbow Mining Company Inc; 1977-10-01 to 1978-04-04; source msha-controller-operator-history
- **operator_operates_mine:** Pilot Rock Mining Corp → No 1 Mine; 1978-04-05 to 1980-12-02; source msha-controller-operator-history
- **controller_controls_mine:** Morgan Wayne → No 1 Mine; 1978-04-05 to 1982-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Morgan Wayne → Pilot Rock Mining Corp; 1978-04-05 to 1980-12-02; source msha-controller-operator-history
- **operator_operates_mine:** Eagle Mining Company Inc → No 1 Mine; 1980-12-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Asbury Harold F Et Al → No 1 Mine; 1980-12-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Asbury Harold F Et Al → Eagle Mining Company Inc; 1980-12-03 to current/open; source msha-controller-operator-history