# Relationship history for MSHA mine 0301726

Current hierarchy: **Mark  Wiley; Larry  Harkins → Mid-America Mining & Development Inc → Wilkem #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

- **operator_operates_mine:** Mid-America Mining & Development Inc → Wilkem #1; 1992-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Larry  Harkins et al → Wilkem #1; 1992-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Harkins et al → Mid-America Mining & Development Inc; 1992-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Wiley et al → Mid-America Mining & Development Inc; 1992-03-01 to current/open; source msha-controller-operator-history