# Relationship history for MSHA mine 3607732

Current hierarchy: **Bright Richard D → Bird Loading Company Inc → Sunshine Siding**

- 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:** Bright Richard D Et Al → Sunshine Siding; 1977-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Shaffer Coal Sales Company → Sunshine Siding; 1985-08-01 to 1986-03-04; source msha-controller-operator-history
- **controller_controls_mine:** Shaffer Robert → Sunshine Siding; 1985-08-01 to 1986-03-04; source msha-controller-operator-history
- **controller_controls_operator:** Shaffer Robert → Shaffer Coal Sales Company; 1985-08-01 to 1986-03-04; source msha-controller-operator-history
- **operator_operates_mine:** Bird Loading Company Inc → Sunshine Siding; 1986-03-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bright Richard D Et Al → Bird Loading Company Inc; 1986-03-05 to current/open; source msha-controller-operator-history