# Relationship history for MSHA mine 0301958

Current hierarchy: **Summit Materials LLC → RK Hall Construction, LTD → Kirby Crusher #15**

- 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:** Pike County Construction LLC → Kirby Crusher #15; 2007-09-20 to 2010-01-03; source msha-controller-operator-history
- **controller_controls_mine:** John A  Powers et al → Kirby Crusher #15; 2007-09-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John A  Powers et al → Pike County Construction LLC; 2007-09-20 to 2010-01-03; source msha-controller-operator-history
- **controller_controls_operator:** Larry Joe  Earnest et al → Pike County Construction LLC; 2007-09-20 to 2010-01-03; source msha-controller-operator-history
- **operator_operates_mine:** RK Hall Construction, LTD → Kirby Crusher #15; 2010-01-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mark  Buster et al → Kirby Crusher #15; 2010-01-04 to 2011-01-31; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Buster et al → RK Hall Construction, LTD; 2010-01-04 to 2011-01-31; source msha-controller-operator-history
- **controller_controls_operator:** Robert Keith  Hall et al → RK Hall Construction, LTD; 2010-01-04 to 2011-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Summit Materials LLC → Kirby Crusher #15; 2011-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Summit Materials LLC → RK Hall Construction, LTD; 2011-02-01 to current/open; source msha-controller-operator-history