# Relationship history for MSHA mine 1601286

Current hierarchy: **Bryant Olen → C O B Sand & Gravel Llc → LA SAND & GRAVEL, L.L.C.**

- 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

- **operator_operates_mine:** Rockbottom Sand & Gravel L L C → LA SAND & GRAVEL, L.L.C.; 1995-04-01 to 1997-11-18; source msha-controller-operator-history
- **controller_controls_mine:** Meredith Robert E → LA SAND & GRAVEL, L.L.C.; 1995-04-01 to 1997-11-18; source msha-controller-operator-history
- **controller_controls_operator:** Meredith Robert E → Rockbottom Sand & Gravel L L C; 1995-04-01 to 1997-11-18; source msha-controller-operator-history
- **operator_operates_mine:** L A Sand & Gravel Llc → LA SAND & GRAVEL, L.L.C.; 1997-11-19 to 1999-06-03; source msha-controller-operator-history
- **controller_controls_mine:** Eymard Ross & Louis → LA SAND & GRAVEL, L.L.C.; 1997-11-19 to 1999-06-03; source msha-controller-operator-history
- **controller_controls_operator:** Eymard Ross & Louis → L A Sand & Gravel Llc; 1997-11-19 to 1999-06-03; source msha-controller-operator-history
- **controller_controls_mine:** Bryant Olen → LA SAND & GRAVEL, L.L.C.; 1998-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** C O B Sand & Gravel Llc → LA SAND & GRAVEL, L.L.C.; 1999-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bryant Olen → C O B Sand & Gravel Llc; 1999-06-04 to current/open; source msha-controller-operator-history