# Relationship history for MSHA mine 0405403

Current hierarchy: **Donald  Mallory; Steven R Mallory → Silica Resources, Inc. → STRINGER 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:** Jack L  Greenhalgh → STRINGER PIT; 1991-01-01 to 2014-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Mallory & Greenhalgh Inc → STRINGER PIT; 2000-02-01 to 2006-02-16; source msha-controller-operator-history
- **controller_controls_mine:** Jack L  Greenhalgh → STRINGER PIT; 2000-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jack L  Greenhalgh → Mallory & Greenhalgh Inc; 2000-02-01 to 2006-02-16; source msha-controller-operator-history
- **operator_operates_mine:** Silica Resources, Inc. → STRINGER PIT; 2006-02-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jack L  Greenhalgh → Silica Resources, Inc.; 2006-02-17 to 2014-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Marlys E  Greenhalgh et al → STRINGER PIT; 2014-08-01 to 2021-12-27; source msha-controller-operator-history
- **controller_controls_operator:** Marlys E  Greenhalgh et al → Silica Resources, Inc.; 2014-08-01 to 2021-12-27; source msha-controller-operator-history
- **controller_controls_operator:** Edward  Mallory et al → Silica Resources, Inc.; 2014-08-01 to 2021-12-27; source msha-controller-operator-history
- **controller_controls_mine:** Steven R Mallory et al → STRINGER PIT; 2021-12-28 to 2022-09-11; source msha-controller-operator-history
- **controller_controls_operator:** Steven R Mallory et al → Silica Resources, Inc.; 2021-12-28 to 2022-09-11; source msha-controller-operator-history
- **controller_controls_operator:** Estate of Marlys Greenhalgh et al → Silica Resources, Inc.; 2021-12-28 to 2022-09-11; source msha-controller-operator-history
- **controller_controls_mine:** Steven R Mallory et al → STRINGER PIT; 2022-09-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steven R Mallory et al → Silica Resources, Inc.; 2022-09-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donald  Mallory et al → Silica Resources, Inc.; 2022-09-12 to current/open; source msha-controller-operator-history