# Relationship history for MSHA mine 3002229

Current hierarchy: **Martin A  Galasso Jr → TRI CITY HIGHWAY PRODUCTS INC. → FENTON 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:** John L O'Brien → FENTON PIT; 1950-01-01 to 2002-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Jerry D  O'Brien Sr → FENTON PIT; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerry D  O'Brien Sr → John L O'Brien; 1950-01-01 to 2002-12-31; source msha-controller-operator-history
- **operator_operates_mine:** TRI CITY HIGHWAY PRODUCTS INC. → FENTON PIT; 2003-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Martin A  Galasso Jr et al → FENTON PIT; 2003-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Martin A  Galasso Jr et al → TRI CITY HIGHWAY PRODUCTS INC.; 2003-01-01 to current/open; source msha-controller-operator-history