# Relationship history for MSHA mine 1512400

Current hierarchy: **Kiser Blake & Jimmy-Arthur Tackett → Kiser & Tackett Coal Company Inc → No Br-12 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:** Kiser Jimmy → No Br-12 Mine; 1974-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kiser Brothers Coal Company Inc → No Br-12 Mine; 1980-06-01 to 1980-07-13; source msha-controller-operator-history
- **controller_controls_operator:** Kiser Jimmy → Kiser Brothers Coal Company Inc; 1980-06-01 to 1980-07-13; source msha-controller-operator-history
- **operator_operates_mine:** Kiser & Tackett Coal Company Inc → No Br-12 Mine; 1980-07-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kiser Blake & Jimmy-Arthur Tackett → No Br-12 Mine; 1980-07-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kiser Blake & Jimmy-Arthur Tackett → Kiser & Tackett Coal Company Inc; 1980-07-14 to current/open; source msha-controller-operator-history