# Relationship history for MSHA mine 1514763

Current hierarchy: **Stephen C  Skidmore → Canfield Energy Inc → Canfield #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:** Randy  Johnson et al → Canfield #1; 1984-02-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Westerman Coal Company Inc → Canfield #1; 1984-07-01 to 1989-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Randy  Johnson et al → Westerman Coal Company Inc; 1984-07-01 to 1989-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Lee  Congleton → Canfield #1; 1989-03-09 to 1993-02-07; source msha-controller-operator-history
- **operator_operates_mine:** Richland Contracting Company → Canfield #1; 1989-05-01 to 1993-02-07; source msha-controller-operator-history
- **controller_controls_operator:** Lee  Congleton → Richland Contracting Company; 1989-05-01 to 1993-02-07; source msha-controller-operator-history
- **operator_operates_mine:** Canfield Energy Inc → Canfield #1; 1993-02-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stephen C  Skidmore → Canfield #1; 1993-02-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stephen C  Skidmore → Canfield Energy Inc; 1993-02-08 to current/open; source msha-controller-operator-history