# Relationship history for MSHA mine 4605191

Current hierarchy: **Skaggs Edward O & Jerry P Frisby → M & B Coal Company Ltd → #5 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:** Lindstrom Timothy → #5 Mine; 1976-02-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Leatherwood Mining Corp → #5 Mine; 1976-06-14 to 1980-05-07; source msha-controller-operator-history
- **controller_controls_operator:** Lindstrom Timothy → Leatherwood Mining Corp; 1976-06-14 to 1980-05-07; source msha-controller-operator-history
- **operator_operates_mine:** M & B Coal Company Ltd → #5 Mine; 1980-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Skaggs Edward O & Jerry P Frisby → #5 Mine; 1980-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Skaggs Edward O & Jerry P Frisby → M & B Coal Company Ltd; 1980-05-08 to current/open; source msha-controller-operator-history