# Relationship history for MSHA mine 3102092

Current hierarchy: **Ronnie G  Kirkpatrick Jr → G S MATERIALS INC → Emery Pit**

- 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:** R G  Kirkpatrick Sr. → Emery Pit; 1986-01-01 to 2018-09-16; source msha-controller-operator-history
- **operator_operates_mine:** Thompson Sand Products Inc → Emery Pit; 1992-12-01 to 2002-04-28; source msha-controller-operator-history
- **controller_controls_mine:** David B  Thompson et al → Emery Pit; 1992-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David B  Thompson et al → Thompson Sand Products Inc; 1992-12-01 to 2002-04-28; source msha-controller-operator-history
- **operator_operates_mine:** G S MATERIALS INC → Emery Pit; 2002-04-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** R G  Kirkpatrick Sr. → G S MATERIALS INC; 2002-04-29 to 2018-09-16; source msha-controller-operator-history
- **controller_controls_mine:** Ronnie G  Kirkpatrick Jr → Emery Pit; 2018-09-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronnie G  Kirkpatrick Jr → G S MATERIALS INC; 2018-09-17 to current/open; source msha-controller-operator-history