# Relationship history for MSHA mine 1518396

Current hierarchy: **Americas Energy Company → Evans Coal Corp → Mine #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:** Barbara  Evans et al → Mine #1; 1987-12-28 to 2010-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Evans Coal Corp → Mine #1; 2001-06-01 to 2010-01-25; source msha-controller-operator-history
- **controller_controls_operator:** Barbara  Evans et al → Evans Coal Corp; 2001-06-01 to 2010-01-25; source msha-controller-operator-history
- **controller_controls_mine:** Robert O  Roan → Mine #1; 2001-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** ROCO Enterprises, Inc. → Mine #1; 2010-01-26 to 2010-03-07; source msha-controller-operator-history
- **controller_controls_operator:** Robert O  Roan → ROCO Enterprises, Inc.; 2010-01-26 to 2010-03-07; source msha-controller-operator-history
- **operator_operates_mine:** Black Diamond Energy, Inc. → Mine #1; 2010-03-08 to 2011-07-11; source msha-controller-operator-history
- **controller_controls_mine:** Robert C  Gregory Jr → Mine #1; 2010-03-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert C  Gregory Jr → Black Diamond Energy, Inc.; 2010-03-08 to 2011-07-11; source msha-controller-operator-history
- **controller_controls_mine:** Americas Energy Company → Mine #1; 2010-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Americas Energy Company → Evans Coal Corp; 2010-04-01 to 2010-01-25; source msha-controller-operator-history
- **operator_operates_mine:** Evans Coal Corp → Mine #1; 2011-07-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Americas Energy Company → Evans Coal Corp; 2011-07-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Barbara  Evans et al → Evans Coal Corp; 2011-07-12 to 2010-03-31; source msha-controller-operator-history