# Relationship history for MSHA mine 0102792

Current hierarchy: **Timothy L  McCoy → Alabama Land & Mineral Corp → Pit #35**

- 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:** Webb Martin B → Pit #35; 1983-10-17 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rock City Coal & Equipment Inc → Pit #35; 1989-03-01 to 1996-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Webb Martin B → Rock City Coal & Equipment Inc; 1989-03-01 to 1996-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Timothy L  McCoy → Pit #35; 1996-01-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Alabama Land & Mineral Corp → Pit #35; 1996-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Timothy L  McCoy → Alabama Land & Mineral Corp; 1996-05-01 to current/open; source msha-controller-operator-history