# Relationship history for MSHA mine 2003035

Current hierarchy: **Mike T  May; Ted J  May → Lewiston Sand & Gravel → MAY-MCCREADY BUTTLES ROAD 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Lewiston Sand & Gravel → MAY-MCCREADY BUTTLES ROAD PIT; 1997-08-01 to 2014-04-14; source msha-controller-operator-history
- **controller_controls_mine:** Thomas C  May → MAY-MCCREADY BUTTLES ROAD PIT; 1997-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas C  May → Lewiston Sand & Gravel; 1997-08-01 to 2014-04-14; source msha-controller-operator-history
- **controller_controls_mine:** Mike T  May  et al → MAY-MCCREADY BUTTLES ROAD PIT; 2009-01-27 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lewiston Sand & Gravel → MAY-MCCREADY BUTTLES ROAD PIT; 2014-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mike T  May  et al → Lewiston Sand & Gravel; 2014-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ted J  May  et al → Lewiston Sand & Gravel; 2014-04-15 to current/open; source msha-controller-operator-history