# Relationship history for MSHA mine 3607923

Current hierarchy: **Heidelberg Materials AG → Hanson Aggregates BMC Inc → Lower Burrell Plant**

- 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:** C H  Booth Jr → Lower Burrell Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Straub Glenn F → Lower Burrell Plant; 1981-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Burrell Construction & Supply Company → Lower Burrell Plant; 1987-09-01 to 1988-06-30; source msha-controller-operator-history
- **controller_controls_operator:** C H  Booth Jr → Burrell Construction & Supply Company; 1987-09-01 to 1988-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Ohio River Sand & Gravel → Lower Burrell Plant; 1988-07-01 to 1990-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Straub Glenn F → Ohio River Sand & Gravel; 1988-07-01 to 1990-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Pioneer International Ltd → Lower Burrell Plant; 1989-01-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Pioneer Mid-Atlantic Inc → Lower Burrell Plant; 1990-07-10 to 2000-08-03; source msha-controller-operator-history
- **controller_controls_operator:** Pioneer International Ltd → Pioneer Mid-Atlantic Inc; 1990-07-10 to 2000-08-03; source msha-controller-operator-history
- **controller_controls_mine:** USS Holdings Inc → Lower Burrell Plant; 1996-03-09 to 2003-07-18; source msha-controller-operator-history
- **operator_operates_mine:** Hanson Aggregates Pma Inc → Lower Burrell Plant; 2000-08-04 to 2008-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Hanson PLC → Lower Burrell Plant; 2000-08-04 to 2007-08-22; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Hanson Aggregates Pma Inc; 2000-08-04 to 2007-08-22; source msha-controller-operator-history
- **controller_controls_mine:** Hanson PLC → Lower Burrell Plant; 2003-07-19 to 2007-08-22; source msha-controller-operator-history
- **controller_controls_mine:** Heidelberg Materials AG → Lower Burrell Plant; 2007-08-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Heidelberg Materials AG → Hanson Aggregates Pma Inc; 2007-08-23 to 2008-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Hanson Aggregates BMC Inc → Lower Burrell Plant; 2009-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Heidelberg Materials AG → Hanson Aggregates BMC Inc; 2009-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Hanson Aggregates BMC Inc; 2009-01-01 to 2007-08-22; source msha-controller-operator-history
- **controller_controls_operator:** USS Holdings Inc → Hanson Aggregates BMC Inc; 2009-01-01 to 2003-07-18; source msha-controller-operator-history