# Relationship history for MSHA mine 0801210

Current hierarchy: **Glenn D  Counts → Counts Construction Co., Inc. → Diamondback  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:** Glenn D  Counts → Diamondback  Mine; 1991-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Counts Const → Diamondback  Mine; 1993-05-01 to 2007-01-01; source msha-controller-operator-history
- **controller_controls_operator:** Glenn D  Counts → Counts Const; 1993-05-01 to 2007-01-01; source msha-controller-operator-history
- **operator_operates_mine:** Magnum Materials → Diamondback  Mine; 2007-01-02 to 2019-03-06; source msha-controller-operator-history
- **controller_controls_mine:** Jon  Barber et al → Diamondback  Mine; 2007-01-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jon  Barber et al → Magnum Materials; 2007-01-02 to 2019-03-06; source msha-controller-operator-history
- **operator_operates_mine:** Counts Construction Co., Inc. → Diamondback  Mine; 2019-03-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Glenn D  Counts → Counts Construction Co., Inc.; 2019-03-07 to current/open; source msha-controller-operator-history