# Relationship history for MSHA mine 1515853

Current hierarchy: **Crawford Dennis R & Danny R → Steel Hollow Mining Inc → #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:** Miles Henry Eddie → #1; 1985-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Summar Coal Company → #1; 1986-12-01 to 1988-06-27; source msha-controller-operator-history
- **controller_controls_operator:** Miles Henry Eddie → Summar Coal Company; 1986-12-01 to 1988-06-27; source msha-controller-operator-history
- **operator_operates_mine:** Steel Hollow Mining Inc → #1; 1988-06-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Crawford Dennis R & Danny R → #1; 1988-06-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Crawford Dennis R & Danny R → Steel Hollow Mining Inc; 1988-06-28 to current/open; source msha-controller-operator-history