# Relationship history for MSHA mine 2003131

Current hierarchy: **Amber  Hoover; Amy  Watson; James  Sturrus Jr → High Grade Materials Co → Nashville 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

- **controller_controls_mine:** James P  Sturrus → Nashville Pit; 1998-05-01 to 2019-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Pennock Stone & Gravel Inc → Nashville Pit; 1999-07-01 to 2000-04-11; source msha-controller-operator-history
- **controller_controls_mine:** Timothy R Boucher → Nashville Pit; 1999-07-01 to 2000-04-11; source msha-controller-operator-history
- **controller_controls_operator:** Timothy R Boucher → Pennock Stone & Gravel Inc; 1999-07-01 to 2000-04-11; source msha-controller-operator-history
- **operator_operates_mine:** Pennock Stone & Gravel → Nashville Pit; 2000-04-12 to 2002-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Allen  Mead et al → Nashville Pit; 2000-04-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Allen  Mead et al → Pennock Stone & Gravel; 2000-04-12 to 2002-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Harry  Mead et al → Pennock Stone & Gravel; 2000-04-12 to 2002-02-28; source msha-controller-operator-history
- **operator_operates_mine:** MEAD SAND & GRAVEL → Nashville Pit; 2002-03-01 to 2006-06-21; source msha-controller-operator-history
- **controller_controls_mine:** Mary Ann  Mead → Nashville Pit; 2002-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mary Ann  Mead → MEAD SAND & GRAVEL; 2002-03-01 to 2006-06-21; source msha-controller-operator-history
- **operator_operates_mine:** C & D HUGHES INC → Nashville Pit; 2006-06-22 to 2022-07-21; source msha-controller-operator-history
- **controller_controls_mine:** Cheryl L  Hughes → Nashville Pit; 2006-06-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cheryl L  Hughes → C & D HUGHES INC; 2006-06-22 to 2022-07-21; source msha-controller-operator-history
- **controller_controls_mine:** Amy  Watson et al → Nashville Pit; 2019-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** High Grade Materials Co → Nashville Pit; 2022-07-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Amy  Watson et al → High Grade Materials Co; 2022-07-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James  Sturrus Jr et al → High Grade Materials Co; 2022-07-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Amber  Hoover et al → High Grade Materials Co; 2022-07-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James P  Sturrus → High Grade Materials Co; 2022-07-22 to 2019-04-30; source msha-controller-operator-history