# Relationship history for MSHA mine 4103666

Current hierarchy: **AA  Price → Price Construction → Webb #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

- **controller_controls_mine:** AA  Price → Webb #1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** McLean Family LTD et al → Webb #1; 1990-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Flint Crushing Inc → Webb #1; 1991-04-01 to 1994-04-06; source msha-controller-operator-history
- **controller_controls_operator:** McLean Family LTD et al → Flint Crushing Inc; 1991-04-01 to 1994-04-06; source msha-controller-operator-history
- **controller_controls_operator:** McLean Commercial Management LC et al → Flint Crushing Inc; 1991-04-01 to 1994-04-06; source msha-controller-operator-history
- **operator_operates_mine:** Price Construction → Webb #1; 1994-04-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** AA  Price → Price Construction; 1994-04-07 to current/open; source msha-controller-operator-history