# Relationship history for MSHA mine 0103114

Current hierarchy: **Marc B  Tyson; Paul W  Bryant Jr → Southeastern Sand & Gravel LLC → Wallace-Pit #3**

- 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:** C R  Campbell Sr et al → Wallace-Pit #3; 1990-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** South Alabama Materials Inc → Wallace-Pit #3; 1997-09-01 to 1999-05-31; source msha-controller-operator-history
- **controller_controls_operator:** C R  Campbell Sr et al → South Alabama Materials Inc; 1997-09-01 to 1999-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Sand & Gravel Materials Llc → Wallace-Pit #3; 1999-06-01 to 2001-06-05; source msha-controller-operator-history
- **controller_controls_mine:** Harry E  Lambert → Wallace-Pit #3; 1999-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harry E  Lambert → Sand & Gravel Materials Llc; 1999-06-01 to 2001-06-05; source msha-controller-operator-history
- **operator_operates_mine:** Southeastern Sand & Gravel LLC → Wallace-Pit #3; 2001-06-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Marc B  Tyson et al → Wallace-Pit #3; 2001-06-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marc B  Tyson et al → Southeastern Sand & Gravel LLC; 2001-06-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul W  Bryant Jr et al → Southeastern Sand & Gravel LLC; 2001-06-06 to current/open; source msha-controller-operator-history