# Relationship history for MSHA mine 1516417

Current hierarchy: **Lloyd  Cole; Larry  Hubbard → C & H Mining → No 7 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

- **operator_operates_mine:** M D B Contracting Inc → No 7 Mine; 1988-07-01 to 1994-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Brock John → No 7 Mine; 1988-07-01 to 1994-01-31; source msha-controller-operator-history
- **controller_controls_operator:** Brock John → M D B Contracting Inc; 1988-07-01 to 1994-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Larry  Hubbard  et al → No 7 Mine; 1989-07-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** C & H Mining → No 7 Mine; 1994-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Hubbard  et al → C & H Mining; 1994-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lloyd  Cole  et al → C & H Mining; 1994-02-01 to current/open; source msha-controller-operator-history