# Relationship history for MSHA mine 4500056

Current hierarchy: **Prime Cascade Investments Llc; Barclays North Inc → Rominco Llc → BIG BEAR QUARRY**

- 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

- **operator_operates_mine:** Ted A Schaneltzer → BIG BEAR QUARRY; 1950-01-01 to 1980-04-08; source msha-controller-operator-history
- **controller_controls_mine:** Schaneltzer Ted A → BIG BEAR QUARRY; 1950-01-01 to 1980-04-08; source msha-controller-operator-history
- **controller_controls_operator:** Schaneltzer Ted A → Ted A Schaneltzer; 1950-01-01 to 1980-04-08; source msha-controller-operator-history
- **controller_controls_mine:** Jerry (GR)  Severson → BIG BEAR QUARRY; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** G R Severson Trucking Company → BIG BEAR QUARRY; 1980-04-09 to 1980-06-11; source msha-controller-operator-history
- **controller_controls_operator:** Jerry (GR)  Severson → G R Severson Trucking Company; 1980-04-09 to 1980-06-11; source msha-controller-operator-history
- **operator_operates_mine:** William Joplin → BIG BEAR QUARRY; 1980-06-12 to 1981-01-26; source msha-controller-operator-history
- **controller_controls_mine:** William  Joplin → BIG BEAR QUARRY; 1980-06-12 to 1981-01-26; source msha-controller-operator-history
- **controller_controls_operator:** William  Joplin → William Joplin; 1980-06-12 to 1981-01-26; source msha-controller-operator-history
- **operator_operates_mine:** Miller Lime & Quarry Inc → BIG BEAR QUARRY; 1981-01-27 to 1988-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Eugene A  Hos et al → BIG BEAR QUARRY; 1981-01-27 to 1988-11-15; source msha-controller-operator-history
- **controller_controls_operator:** Eugene A  Hos et al → Miller Lime & Quarry Inc; 1981-01-27 to 1988-11-15; source msha-controller-operator-history
- **operator_operates_mine:** Miller Lime & Quarry → BIG BEAR QUARRY; 1988-11-16 to 1993-06-16; source msha-controller-operator-history
- **controller_controls_mine:** Leslie E  McCombs → BIG BEAR QUARRY; 1988-11-16 to 1993-06-16; source msha-controller-operator-history
- **controller_controls_operator:** Leslie E  McCombs → Miller Lime & Quarry; 1988-11-16 to 1993-06-16; source msha-controller-operator-history
- **operator_operates_mine:** Alpine Rockeries Inc → BIG BEAR QUARRY; 1993-06-17 to 1999-02-10; source msha-controller-operator-history
- **controller_controls_mine:** Patricia  Seals → BIG BEAR QUARRY; 1993-06-17 to 1999-02-10; source msha-controller-operator-history
- **controller_controls_operator:** Patricia  Seals → Alpine Rockeries Inc; 1993-06-17 to 1999-02-10; source msha-controller-operator-history
- **operator_operates_mine:** Rominco Llc → BIG BEAR QUARRY; 1999-02-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Barclays North Inc → BIG BEAR QUARRY; 1999-02-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Barclays North Inc → Rominco Llc; 1999-02-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Prime Cascade Investments Llc et al → Rominco Llc; 1999-02-11 to current/open; source msha-controller-operator-history