# Relationship history for MSHA mine 5001747

Current hierarchy: **Chris J  Meng → JJC Enterprises Inc → JJC Crusher 1**

- 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:** RUSSELL S  NELSON  ET AL → JJC Crusher 1; 2001-09-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Horizon Contractors → JJC Crusher 1; 2002-06-30 to 2002-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Gary  Buchholz → JJC Crusher 1; 2002-06-30 to 2004-06-16; source msha-controller-operator-history
- **controller_controls_operator:** Gary  Buchholz → Horizon Contractors; 2002-06-30 to 2002-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Choggiung Limited → JJC Crusher 1; 2003-01-01 to 2020-05-04; source msha-controller-operator-history
- **controller_controls_operator:** RUSSELL S  NELSON  ET AL → Choggiung Limited; 2003-01-01 to 2020-05-04; source msha-controller-operator-history
- **controller_controls_operator:** KARL S  POTTS  ET AL → Choggiung Limited; 2003-01-01 to 2020-05-04; source msha-controller-operator-history
- **controller_controls_mine:** Robert  Heyano → JJC Crusher 1; 2004-06-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Heyano → Horizon Contractors; 2004-06-17 to 2002-12-31; source msha-controller-operator-history
- **operator_operates_mine:** JJC Enterprises Inc → JJC Crusher 1; 2020-05-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Chris J  Meng → JJC Crusher 1; 2020-05-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chris J  Meng → JJC Enterprises Inc; 2020-05-05 to current/open; source msha-controller-operator-history