# Relationship history for MSHA mine 3401287

Current hierarchy: **Tiger Industrial Transportation System Inc → Tiger Rock Inc → TIGER 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:** Enterprise Materials Inc → TIGER PIT; 1980-10-01 to 1983-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Norman  Janeway → TIGER PIT; 1980-10-01 to 1983-01-31; source msha-controller-operator-history
- **controller_controls_operator:** Norman  Janeway → Enterprise Materials Inc; 1980-10-01 to 1983-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Haskell County Gravel Company Inc → TIGER PIT; 1983-02-01 to 1983-05-24; source msha-controller-operator-history
- **controller_controls_mine:** Howard  Mattox et al → TIGER PIT; 1983-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Howard  Mattox et al → Haskell County Gravel Company Inc; 1983-02-01 to 1983-05-24; source msha-controller-operator-history
- **operator_operates_mine:** Highway 9 Rock & Gravel Company → TIGER PIT; 1983-05-25 to 1983-09-07; source msha-controller-operator-history
- **controller_controls_mine:** Henry  Parker → TIGER PIT; 1983-05-25 to 1983-09-07; source msha-controller-operator-history
- **controller_controls_operator:** Henry  Parker → Highway 9 Rock & Gravel Company; 1983-05-25 to 1983-09-07; source msha-controller-operator-history
- **operator_operates_mine:** Haskell County Gravel Company Inc → TIGER PIT; 1983-09-08 to 1984-04-09; source msha-controller-operator-history
- **controller_controls_operator:** Howard  Mattox et al → Haskell County Gravel Company Inc; 1983-09-08 to 1984-04-09; source msha-controller-operator-history
- **operator_operates_mine:** Haskell County Gravel Company Inc → TIGER PIT; 1984-04-10 to 1995-05-04; source msha-controller-operator-history
- **controller_controls_mine:** Stanley  Synar et al → TIGER PIT; 1984-04-10 to 1995-05-04; source msha-controller-operator-history
- **controller_controls_operator:** Stanley  Synar et al → Haskell County Gravel Company Inc; 1984-04-10 to 1995-05-04; source msha-controller-operator-history
- **operator_operates_mine:** Tiger Rock Inc → TIGER PIT; 1995-05-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tiger Industrial Transportation System Inc → TIGER PIT; 1995-05-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tiger Industrial Transportation System Inc → Tiger Rock Inc; 1995-05-05 to current/open; source msha-controller-operator-history