# Relationship history for MSHA mine 4503319

Current hierarchy: **Dale L  Wallace; Donald J  Wallace → Wallace Bros. Inc. → Mandy Rd 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:** Randy Wallace → Mandy Rd Pit; 1994-05-01 to 2003-03-17; source msha-controller-operator-history
- **controller_controls_mine:** Randy  Wallace → Mandy Rd Pit; 1994-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Randy  Wallace → Randy Wallace; 1994-05-01 to 2003-03-17; source msha-controller-operator-history
- **operator_operates_mine:** Wallace Rock Products → Mandy Rd Pit; 2003-03-18 to 2008-07-26; source msha-controller-operator-history
- **controller_controls_mine:** Donald R  Wallace → Mandy Rd Pit; 2003-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donald R  Wallace → Wallace Rock Products; 2003-03-18 to 2008-07-26; source msha-controller-operator-history
- **operator_operates_mine:** Wallace Bros. Inc. → Mandy Rd Pit; 2008-07-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dale L  Wallace et al → Mandy Rd Pit; 2008-07-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dale L  Wallace et al → Wallace Bros. Inc.; 2008-07-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donald J  Wallace et al → Wallace Bros. Inc.; 2008-07-27 to current/open; source msha-controller-operator-history