# Relationship history for MSHA mine 4604746

Current hierarchy: **Bramer Richard Mark → M & M Limestone Inc → No 1 Mine**

- 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:** Andrew Robert → No 1 Mine; 1974-09-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ashcraft Coal Company Inc → No 1 Mine; 1975-10-01 to 1979-05-10; source msha-controller-operator-history
- **controller_controls_operator:** Andrew Robert → Ashcraft Coal Company Inc; 1975-10-01 to 1979-05-10; source msha-controller-operator-history
- **operator_operates_mine:** Nelson Mining Inc → No 1 Mine; 1979-05-11 to 1979-10-22; source msha-controller-operator-history
- **controller_controls_mine:** Nelson James → No 1 Mine; 1979-05-11 to 1979-10-22; source msha-controller-operator-history
- **controller_controls_operator:** Nelson James → Nelson Mining Inc; 1979-05-11 to 1979-10-22; source msha-controller-operator-history
- **operator_operates_mine:** Jason Coal Company → No 1 Mine; 1979-10-23 to 1980-09-09; source msha-controller-operator-history
- **controller_controls_mine:** Jason Capital Inc → No 1 Mine; 1979-10-23 to 1980-09-09; source msha-controller-operator-history
- **controller_controls_operator:** Jason Capital Inc → Jason Coal Company; 1979-10-23 to 1980-09-09; source msha-controller-operator-history
- **operator_operates_mine:** M & M Limestone Inc → No 1 Mine; 1980-09-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bramer Richard Mark → No 1 Mine; 1980-09-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bramer Richard Mark → M & M Limestone Inc; 1980-09-10 to current/open; source msha-controller-operator-history