# Relationship history for MSHA mine 2302420

Current hierarchy: **Brice  Fischer → Fischer Minerals LLC → Fischer Minerals LLC**

- 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:** John Klick Trucking LLC → Fischer Minerals LLC; 2011-06-20 to 2023-05-31; source msha-controller-operator-history
- **controller_controls_mine:** John  Klick → Fischer Minerals LLC; 2011-06-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Klick → John Klick Trucking LLC; 2011-06-20 to 2023-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Callaway Gravel Sand & Soil Company LLC → Fischer Minerals LLC; 2023-06-01 to 2026-03-02; source msha-controller-operator-history
- **controller_controls_mine:** Terry L Powers et al → Fischer Minerals LLC; 2023-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Terry L Powers et al → Callaway Gravel Sand & Soil Company LLC; 2023-06-01 to 2026-03-02; source msha-controller-operator-history
- **controller_controls_operator:** Merlin Ray Smith et al → Callaway Gravel Sand & Soil Company LLC; 2023-06-01 to 2026-03-02; source msha-controller-operator-history
- **operator_operates_mine:** Fischer Minerals LLC → Fischer Minerals LLC; 2026-03-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brice  Fischer → Fischer Minerals LLC; 2026-03-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brice  Fischer → Fischer Minerals LLC; 2026-03-03 to current/open; source msha-controller-operator-history