# Relationship history for MSHA mine 0100703

Current hierarchy: **R J Billingsley Inc → Mobile Asphalt Company → Garris Pit**

- 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:** Mc Kee Construction Company → Garris Pit; 1950-01-01 to 1984-10-15; source msha-controller-operator-history
- **controller_controls_mine:** Mc Kee Truck & Tractor Company Inc → Garris Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Kee Truck & Tractor Company Inc → Mc Kee Construction Company; 1950-01-01 to 1984-10-15; source msha-controller-operator-history
- **operator_operates_mine:** Mobile Asphalt Company → Garris Pit; 1984-10-16 to 2005-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Butts & Billingsley Construction Company Inc Et Al → Garris Pit; 1984-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Butts & Billingsley Construction Company Inc Et Al → Mobile Asphalt Company; 1984-10-16 to 2005-01-31; source msha-controller-operator-history
- **controller_controls_mine:** R J Billingsley Inc et al → Garris Pit; 1998-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mobile Asphalt Company → Garris Pit; 2005-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** R J Billingsley Inc et al → Mobile Asphalt Company; 2005-02-01 to current/open; source msha-controller-operator-history