# Relationship history for MSHA mine 2002928

Current hierarchy: **Amrize Ltd → Bill Smith S&G → NB #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: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Meyer Material Acquisition Corp Et Al → NB #1; 1950-01-01 to 2011-07-11; source msha-controller-operator-history
- **controller_controls_mine:** Bill W  Smith → NB #1; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bill Smith Sand & Gravel Inc → NB #1; 1994-05-01 to 1999-01-21; source msha-controller-operator-history
- **controller_controls_operator:** Bill W  Smith → Bill Smith Sand & Gravel Inc; 1994-05-01 to 1999-01-21; source msha-controller-operator-history
- **operator_operates_mine:** Aggregate Industries Northeast Regi → NB #1; 1999-01-22 to 2004-12-06; source msha-controller-operator-history
- **controller_controls_mine:** Aggregate Industries PLC → NB #1; 2001-06-01 to 2009-04-29; source msha-controller-operator-history
- **controller_controls_operator:** Aggregate Industries PLC → Aggregate Industries Northeast Regi; 2001-06-01 to 2004-12-06; source msha-controller-operator-history
- **controller_controls_mine:** Aggregate Industries PLC → NB #1; 2004-06-10 to 2009-04-29; source msha-controller-operator-history
- **operator_operates_mine:** Bill Smith Sand & Gravel → NB #1; 2004-12-07 to 2011-07-11; source msha-controller-operator-history
- **controller_controls_operator:** Aggregate Industries PLC → Bill Smith Sand & Gravel; 2004-12-07 to 2009-04-29; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → NB #1; 2009-04-30 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Aggregate Industries Northeast Regi; 2009-04-30 to 2004-12-06; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → NB #1; 2009-04-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Bill Smith Sand & Gravel; 2009-04-30 to 2011-07-11; source msha-controller-operator-history
- **operator_operates_mine:** Bill Smith S&G → NB #1; 2011-07-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Meyer Material Acquisition Corp Et Al → Bill Smith S&G; 2011-07-12 to 2011-07-11; source msha-controller-operator-history
- **controller_controls_mine:** Aggregate Industries PLC → NB #1; 2011-07-12 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Aggregate Industries PLC → Bill Smith S&G; 2011-07-12 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → NB #1; 2015-07-10 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Aggregate Industries Northeast Regi; 2015-07-10 to 2004-12-06; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Bill Smith S&G; 2015-07-10 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_mine:** Amrize Ltd → NB #1; 2025-06-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Amrize Ltd → Aggregate Industries Northeast Regi; 2025-06-23 to 2004-12-06; source msha-controller-operator-history
- **controller_controls_operator:** Amrize Ltd → Bill Smith S&G; 2025-06-23 to current/open; source msha-controller-operator-history