# Relationship history for MSHA mine 3401440

Current hierarchy: **Tommie Ann  Richardson → LIMESTONE ROCK, GRAVEL & SAND, LLC. → Wolf**

- 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:** Balagna Excavating Inc → Wolf; 1984-03-01 to 1986-05-04; source msha-controller-operator-history
- **controller_controls_mine:** Balagna Mark S → Wolf; 1984-03-01 to 1986-05-04; source msha-controller-operator-history
- **controller_controls_operator:** Balagna Mark S → Balagna Excavating Inc; 1984-03-01 to 1986-05-04; source msha-controller-operator-history
- **operator_operates_mine:** Seminole Stone Company Inc → Wolf; 1986-05-05 to 1988-06-14; source msha-controller-operator-history
- **controller_controls_mine:** Mc Gugan Bronco → Wolf; 1986-05-05 to 1988-06-14; source msha-controller-operator-history
- **controller_controls_operator:** Mc Gugan Bronco → Seminole Stone Company Inc; 1986-05-05 to 1988-06-14; source msha-controller-operator-history
- **operator_operates_mine:** Seminole Stone Company → Wolf; 1988-06-15 to 1990-05-15; source msha-controller-operator-history
- **controller_controls_mine:** Petrick Robert J → Wolf; 1988-06-15 to 1990-05-15; source msha-controller-operator-history
- **controller_controls_operator:** Petrick Robert J → Seminole Stone Company; 1988-06-15 to 1990-05-15; source msha-controller-operator-history
- **operator_operates_mine:** Seminole Stone Company → Wolf; 1990-05-16 to 2015-07-22; source msha-controller-operator-history
- **controller_controls_mine:** Tiger Industrial Transportation System Inc → Wolf; 1990-05-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tiger Industrial Transportation System Inc → Seminole Stone Company; 1990-05-16 to 2015-07-22; source msha-controller-operator-history
- **operator_operates_mine:** LIMESTONE ROCK, GRAVEL & SAND, LLC. → Wolf; 2015-07-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tommie Ann  Richardson et al → Wolf; 2015-07-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tommie Ann  Richardson et al → LIMESTONE ROCK, GRAVEL & SAND, LLC.; 2015-07-23 to current/open; source msha-controller-operator-history