# Relationship history for MSHA mine 4201562

Current hierarchy: **Shumway Dick → M & M Mining → Jim Bo Bob 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:** Zufelt Lynn → Jim Bo Bob Mine; 1978-03-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lynn Zufelt Mining → Jim Bo Bob Mine; 1979-01-01 to 1979-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Zufelt Lynn → Lynn Zufelt Mining; 1979-01-01 to 1979-12-31; source msha-controller-operator-history
- **operator_operates_mine:** M & M Drilling → Jim Bo Bob Mine; 1980-01-01 to 1980-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Shumway Dick Et Al → Jim Bo Bob Mine; 1980-01-01 to 1980-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Shumway Dick Et Al → M & M Drilling; 1980-01-01 to 1980-07-31; source msha-controller-operator-history
- **operator_operates_mine:** M & E Mining Company → Jim Bo Bob Mine; 1980-08-01 to 1981-05-03; source msha-controller-operator-history
- **controller_controls_mine:** Ellis Virgle E Et Al → Jim Bo Bob Mine; 1980-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ellis Virgle E Et Al → M & E Mining Company; 1980-08-01 to 1981-05-03; source msha-controller-operator-history
- **operator_operates_mine:** M & M Mining → Jim Bo Bob Mine; 1981-05-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Shumway Dick Et Al → Jim Bo Bob Mine; 1981-05-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shumway Dick Et Al → M & M Mining; 1981-05-04 to current/open; source msha-controller-operator-history