# Relationship history for MSHA mine 0102678

Current hierarchy: **Nelson Ramona H → Sure Coal Inc → Steep Creek Iii**

- 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:** Faulkner W E → Steep Creek Iii; 1983-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Faulkner Energy Corp → Steep Creek Iii; 1986-04-01 to 1990-11-14; source msha-controller-operator-history
- **controller_controls_operator:** Faulkner W E → Faulkner Energy Corp; 1986-04-01 to 1990-11-14; source msha-controller-operator-history
- **controller_controls_mine:** Tuggle James A → Steep Creek Iii; 1988-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Nelson Ramona H → Steep Creek Iii; 1990-06-14 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dove Coal Corp → Steep Creek Iii; 1990-11-15 to 1991-02-20; source msha-controller-operator-history
- **controller_controls_operator:** Tuggle James A → Dove Coal Corp; 1990-11-15 to 1991-02-20; source msha-controller-operator-history
- **operator_operates_mine:** Faulkner Energy Corp → Steep Creek Iii; 1991-02-21 to 1991-07-30; source msha-controller-operator-history
- **controller_controls_operator:** Faulkner W E → Faulkner Energy Corp; 1991-02-21 to 1991-07-30; source msha-controller-operator-history
- **operator_operates_mine:** Sure Coal Inc → Steep Creek Iii; 1991-07-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nelson Ramona H → Sure Coal Inc; 1991-07-31 to current/open; source msha-controller-operator-history