# Relationship history for MSHA mine 2801000

Current hierarchy: **Naceville Materials Inc; Haines & Kibblehouse Inc → Naceville Materials J.V. → Belvidere Sand & Gravel**

- 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:** Naceville Materials Inc  et al → Belvidere Sand & Gravel; 1992-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Oscar Unagst → Belvidere Sand & Gravel; 1998-07-01 to 2000-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Oscar  Unagst → Belvidere Sand & Gravel; 1998-07-01 to 2000-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Oscar  Unagst → Oscar Unagst; 1998-07-01 to 2000-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Belvidere S & G/Div Lehigh Valley Site Cont Inc → Belvidere Sand & Gravel; 2000-05-01 to 2015-04-12; source msha-controller-operator-history
- **controller_controls_mine:** John R  Kibblehouse et al → Belvidere Sand & Gravel; 2000-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John R  Kibblehouse et al → Belvidere S & G/Div Lehigh Valley Site Cont Inc; 2000-05-01 to 2015-04-12; source msha-controller-operator-history
- **controller_controls_operator:** John B  Haines IV et al → Belvidere S & G/Div Lehigh Valley Site Cont Inc; 2000-05-01 to 2015-04-12; source msha-controller-operator-history
- **operator_operates_mine:** Naceville Materials J.V. → Belvidere Sand & Gravel; 2015-04-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Naceville Materials Inc  et al → Naceville Materials J.V.; 2015-04-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Haines & Kibblehouse Inc et al → Naceville Materials J.V.; 2015-04-13 to current/open; source msha-controller-operator-history