# Relationship history for MSHA mine 4605991

Current hierarchy: **Cyprus Amax Minerals Company → Bentley Coal Company → Audra #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

- **controller_controls_mine:** William E  Konya et al → Audra #1; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Miami Coal Company → Audra #1; 1979-04-01 to 1982-02-11; source msha-controller-operator-history
- **controller_controls_operator:** William E  Konya et al → Miami Coal Company; 1979-04-01 to 1982-02-11; source msha-controller-operator-history
- **controller_controls_operator:** Steve A  Konya et al → Miami Coal Company; 1979-04-01 to 1982-02-11; source msha-controller-operator-history
- **controller_controls_mine:** Cardwell Robert G → Audra #1; 1979-05-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Chw Industries Inc → Audra #1; 1981-08-03 to 1988-02-22; source msha-controller-operator-history
- **operator_operates_mine:** Mogasco Mining Inc → Audra #1; 1982-02-12 to 1985-05-06; source msha-controller-operator-history
- **controller_controls_operator:** Cardwell Robert G → Mogasco Mining Inc; 1982-02-12 to 1985-05-06; source msha-controller-operator-history
- **operator_operates_mine:** C R Howard Inc → Audra #1; 1985-05-07 to 1988-02-22; source msha-controller-operator-history
- **controller_controls_operator:** Chw Industries Inc → C R Howard Inc; 1985-05-07 to 1988-02-22; source msha-controller-operator-history
- **controller_controls_mine:** Cyprus Amax Minerals Company → Audra #1; 1988-02-17 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bentley Coal Company → Audra #1; 1988-02-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cyprus Amax Minerals Company → Bentley Coal Company; 1988-02-23 to current/open; source msha-controller-operator-history