# Relationship history for MSHA mine 1516231

Current hierarchy: **Virginia Conservation Legacy Fund (VCLF) → ERP Environmental Fund Inc → Bluegrass 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:** Charles  Hoke et al → Bluegrass Mine; 1974-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** First Mississippi Corp → Bluegrass Mine; 1983-02-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Pyramid Mining Inc → Bluegrass Mine; 1987-10-01 to 1989-02-21; source msha-controller-operator-history
- **controller_controls_operator:** First Mississippi Corp → Pyramid Mining Inc; 1987-10-01 to 1989-02-21; source msha-controller-operator-history
- **operator_operates_mine:** Hoke Company Inc → Bluegrass Mine; 1989-02-22 to 1991-05-29; source msha-controller-operator-history
- **controller_controls_operator:** Charles  Hoke et al → Hoke Company Inc; 1989-02-22 to 1991-05-29; source msha-controller-operator-history
- **controller_controls_operator:** Anne  Hoke et al → Hoke Company Inc; 1989-02-22 to 1991-05-29; source msha-controller-operator-history
- **operator_operates_mine:** Pyramid Mining Inc → Bluegrass Mine; 1991-05-30 to 1993-10-14; source msha-controller-operator-history
- **controller_controls_operator:** First Mississippi Corp → Pyramid Mining Inc; 1991-05-30 to 1993-10-14; source msha-controller-operator-history
- **operator_operates_mine:** Pyramid Mining Inc → Bluegrass Mine; 1993-10-15 to 1993-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Thunderbird Energy Inc → Bluegrass Mine; 1993-10-15 to 1993-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Thunderbird Energy Inc → Pyramid Mining Inc; 1993-10-15 to 1993-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Grand Eagle Mining Corp → Bluegrass Mine; 1994-01-01 to 1995-04-17; source msha-controller-operator-history
- **controller_controls_mine:** Rick  Ward → Bluegrass Mine; 1994-01-01 to 1995-04-17; source msha-controller-operator-history
- **controller_controls_operator:** Rick  Ward → Grand Eagle Mining Corp; 1994-01-01 to 1995-04-17; source msha-controller-operator-history
- **operator_operates_mine:** Grand Eagle Mining, LLC → Bluegrass Mine; 1995-04-18 to 2015-12-09; source msha-controller-operator-history
- **controller_controls_mine:** Peabody Energy Corporation → Bluegrass Mine; 1995-04-18 to 2007-10-30; source msha-controller-operator-history
- **controller_controls_operator:** Peabody Energy Corporation → Grand Eagle Mining, LLC; 1995-04-18 to 2007-10-30; source msha-controller-operator-history
- **controller_controls_mine:** Patriot Coal Corporation → Bluegrass Mine; 2007-10-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Patriot Coal Corporation → Grand Eagle Mining, LLC; 2007-10-31 to 2015-12-09; source msha-controller-operator-history
- **controller_controls_mine:** Virginia Conservation Legacy Fund (VCLF) → Bluegrass Mine; 2015-10-28 to 2017-01-25; source msha-controller-operator-history
- **operator_operates_mine:** ERP Environmental Fund Inc → Bluegrass Mine; 2015-12-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Virginia Conservation Legacy Fund (VCLF) → ERP Environmental Fund Inc; 2015-12-10 to 2017-01-25; source msha-controller-operator-history
- **controller_controls_mine:** Kissito Healthcare Inc → Bluegrass Mine; 2017-01-26 to 2018-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Kissito Healthcare Inc → ERP Environmental Fund Inc; 2017-01-26 to 2018-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Virginia Conservation Legacy Fund (VCLF) → Bluegrass Mine; 2019-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Virginia Conservation Legacy Fund (VCLF) → ERP Environmental Fund Inc; 2019-01-01 to current/open; source msha-controller-operator-history