# Relationship history for MSHA mine 1514484

Current hierarchy: **Chandler Melvin P-William Alley → Intercoastal Contracting Company → Boney Branch #6**

- 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:** Intercoastal Contracting Company → Boney Branch #6; 1984-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Chandler Melvin P-William Alley Et Al → Boney Branch #6; 1984-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chandler Melvin P-William Alley Et Al → Intercoastal Contracting Company; 1984-03-01 to current/open; source msha-controller-operator-history