# Relationship history for MSHA mine 0202160

Current hierarchy: **NG Operations LLC → Gold Bond Building Products, LLC. → Feldman #2**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Lafarge S A → Feldman #2; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Gold Bond Building Products → Feldman #2; 1983-08-01 to 1993-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge S A → Gold Bond Building Products; 1983-08-01 to 1993-06-30; source msha-controller-operator-history
- **operator_operates_mine:** National Gypsum Company → Feldman #2; 1993-07-01 to 1995-09-20; source msha-controller-operator-history
- **controller_controls_mine:** National Gypsum Company → Feldman #2; 1993-07-01 to 1995-09-20; source msha-controller-operator-history
- **controller_controls_operator:** National Gypsum Company → National Gypsum Company; 1993-07-01 to 1995-09-20; source msha-controller-operator-history
- **operator_operates_mine:** National Gypsum Company → Feldman #2; 1995-09-21 to 2020-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Spangler Companies Inc → Feldman #2; 1995-09-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Spangler Companies Inc → National Gypsum Company; 1995-09-21 to 2020-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Gold Bond Building Products, LLC. → Feldman #2; 2021-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** NG Operations LLC → Feldman #2; 2021-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** NG Operations LLC → Gold Bond Building Products, LLC.; 2021-01-01 to current/open; source msha-controller-operator-history