# Relationship history for MSHA mine 1511717

Current hierarchy: **Lower Hurricane Mining Company Inc → Lower Hurricane Mining Company Inc → Fort Johsnon 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:** Lower Hurricane Mining Company Inc → Fort Johsnon Mine; 1976-12-21 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** A V & C Coal Inc → Fort Johsnon Mine; 1978-12-01 to 1979-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Vaughn Estille & Dennis R Caldwell → Fort Johsnon Mine; 1978-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vaughn Estille & Dennis R Caldwell → A V & C Coal Inc; 1978-12-01 to 1979-12-31; source msha-controller-operator-history
- **operator_operates_mine:** D B & E Coal Inc → Fort Johsnon Mine; 1980-01-01 to 1980-11-18; source msha-controller-operator-history
- **controller_controls_mine:** Stewart Bill--Denny & Emory Newsome → Fort Johsnon Mine; 1980-01-01 to 1980-11-18; source msha-controller-operator-history
- **controller_controls_operator:** Stewart Bill--Denny & Emory Newsome → D B & E Coal Inc; 1980-01-01 to 1980-11-18; source msha-controller-operator-history
- **operator_operates_mine:** Johnson Mining Company → Fort Johsnon Mine; 1980-11-19 to 1981-02-23; source msha-controller-operator-history
- **controller_controls_mine:** Carl R  Johnson et al → Fort Johsnon Mine; 1980-11-19 to 1981-02-23; source msha-controller-operator-history
- **controller_controls_operator:** Carl R  Johnson et al → Johnson Mining Company; 1980-11-19 to 1981-02-23; source msha-controller-operator-history
- **operator_operates_mine:** Johnson Mining Company → Fort Johsnon Mine; 1981-02-24 to 1983-08-15; source msha-controller-operator-history
- **controller_controls_mine:** Johnson Arthur-Charles & Hermis → Fort Johsnon Mine; 1981-02-24 to 1983-08-15; source msha-controller-operator-history
- **controller_controls_operator:** Johnson Arthur-Charles & Hermis → Johnson Mining Company; 1981-02-24 to 1983-08-15; source msha-controller-operator-history
- **operator_operates_mine:** Lower Hurricane Mining Company Inc → Fort Johsnon Mine; 1983-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lower Hurricane Mining Company Inc → Lower Hurricane Mining Company Inc; 1983-08-16 to current/open; source msha-controller-operator-history