# Relationship history for MSHA mine 1515654

Current hierarchy: **Blanton James S-Larry → Rich Creek Coal Company → No 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:** M & M Springfield Mining Inc → No 1; 1986-06-01 to 1987-04-21; source msha-controller-operator-history
- **controller_controls_mine:** Rice Morris → No 1; 1986-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rice Morris → M & M Springfield Mining Inc; 1986-06-01 to 1987-04-21; source msha-controller-operator-history
- **operator_operates_mine:** Rich Creek Coal Company → No 1; 1987-04-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Blanton James S-Larry Et Al → No 1; 1987-04-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Blanton James S-Larry Et Al → Rich Creek Coal Company; 1987-04-22 to current/open; source msha-controller-operator-history