# Relationship history for MSHA mine 1511835

Current hierarchy: **Jesse R  Sizemore; Amy R  Sizemore → Black Mountain Resources LLC → Cobra**

- 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:** B Ray  Thompson → Cobra; 1977-08-01 to 1979-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Clover Coal Company Inc → Cobra; 1979-03-01 to 1979-10-31; source msha-controller-operator-history
- **controller_controls_operator:** B Ray  Thompson → Clover Coal Company Inc; 1979-03-01 to 1979-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Shamrock Coal Company Inc → Cobra; 1979-11-01 to 1994-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Sunoco, Inc. → Cobra; 1979-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sunoco, Inc. → Shamrock Coal Company Inc; 1979-11-01 to 1994-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Bituminous-Laurel Mining Inc → Cobra; 1994-11-01 to 1995-06-19; source msha-controller-operator-history
- **controller_controls_mine:** Williams Companies Inc → Cobra; 1994-11-01 to 1997-01-01; source msha-controller-operator-history
- **controller_controls_operator:** Williams Companies Inc → Bituminous-Laurel Mining Inc; 1994-11-01 to 1995-06-19; source msha-controller-operator-history
- **operator_operates_mine:** Bledsoe Coal Corporation → Cobra; 1995-06-20 to 2014-12-29; source msha-controller-operator-history
- **controller_controls_mine:** James River Coal Company → Cobra; 1995-06-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James River Coal Company → Bledsoe Coal Corporation; 1995-06-20 to 2014-12-29; source msha-controller-operator-history
- **controller_controls_mine:** Jeffery A  Hoops → Cobra; 2009-05-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** BLACKJEWEL, LLC → Cobra; 2014-12-30 to 2019-12-04; source msha-controller-operator-history
- **controller_controls_operator:** Jeffery A  Hoops → BLACKJEWEL, LLC; 2014-12-30 to 2019-12-04; source msha-controller-operator-history
- **controller_controls_mine:** Amy R  Sizemore et al → Cobra; 2019-07-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Black Mountain Resources LLC → Cobra; 2019-12-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Amy R  Sizemore et al → Black Mountain Resources LLC; 2019-12-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jesse R  Sizemore et al → Black Mountain Resources LLC; 2019-12-05 to current/open; source msha-controller-operator-history