# Relationship history for MSHA mine 1514153

Current hierarchy: **Young Conley → Conley Young Construction Inc → No1**

- 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:** Marcum Thomas Ray → No1; 1982-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rocky Mountain Coal Company → No1; 1983-07-01 to 1986-04-08; source msha-controller-operator-history
- **controller_controls_operator:** Marcum Thomas Ray → Rocky Mountain Coal Company; 1983-07-01 to 1986-04-08; source msha-controller-operator-history
- **operator_operates_mine:** Conley Young Construction Inc → No1; 1986-04-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Young Conley → No1; 1986-04-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Young Conley → Conley Young Construction Inc; 1986-04-09 to current/open; source msha-controller-operator-history