# Relationship history for MSHA mine 3503260

Current hierarchy: **Craig  Buche → BUCHE ROCK CRUSHING INC → PLANT 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Hanson Rock Crushing Inc → PLANT 1; 1986-06-01 to 2002-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Bryce  Hanson → PLANT 1; 1986-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bryce  Hanson → Hanson Rock Crushing Inc; 1986-06-01 to 2002-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Harvey W Buche Road Building Inc → PLANT 1; 2002-10-01 to 2018-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Harvey W  Buche → PLANT 1; 2002-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harvey W  Buche → Harvey W Buche Road Building Inc; 2002-10-01 to 2018-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Earl Buche Investments, Inc → PLANT 1; 2018-05-01 to 2019-01-14; source msha-controller-operator-history
- **controller_controls_mine:** Craig  Buche → PLANT 1; 2018-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Craig  Buche → Earl Buche Investments, Inc; 2018-05-01 to 2019-01-14; source msha-controller-operator-history
- **controller_controls_mine:** Craig  Buche → PLANT 1; 2018-11-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** BUCHE ROCK CRUSHING INC → PLANT 1; 2019-01-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Craig  Buche → BUCHE ROCK CRUSHING INC; 2019-01-15 to current/open; source msha-controller-operator-history