# Relationship history for MSHA mine 4503347

Current hierarchy: **Joli  Tewalt; Denice  Tewalt → Beaver Lake Quarry, Inc. → Beaver Lake Quarry**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Martin Marietta Materials Inc → Beaver Lake Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Meridian Aggregates Company LP → Beaver Lake Quarry; 1991-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Beaver Lake Quarry Inc → Beaver Lake Quarry; 1996-02-01 to 1999-10-28; source msha-controller-operator-history
- **controller_controls_mine:** Joli  Tewalt  et al → Beaver Lake Quarry; 1996-02-01 to 1999-10-28; source msha-controller-operator-history
- **controller_controls_operator:** Joli  Tewalt  et al → Beaver Lake Quarry Inc; 1996-02-01 to 1999-10-28; source msha-controller-operator-history
- **operator_operates_mine:** Meridian Aggregates Company → Beaver Lake Quarry; 1999-10-29 to 2001-04-02; source msha-controller-operator-history
- **controller_controls_operator:** Meridian Aggregates Company LP → Meridian Aggregates Company; 1999-10-29 to 2001-04-02; source msha-controller-operator-history
- **operator_operates_mine:** Meridian Aggregates Company Lp → Beaver Lake Quarry; 2001-04-03 to 2005-12-06; source msha-controller-operator-history
- **controller_controls_mine:** Martin Marietta Materials Inc → Beaver Lake Quarry; 2001-04-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → Meridian Aggregates Company Lp; 2001-04-03 to 2005-12-06; source msha-controller-operator-history
- **operator_operates_mine:** Martin Marietta Materials, Inc. → Beaver Lake Quarry; 2005-12-07 to 2015-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → Martin Marietta Materials, Inc.; 2005-12-07 to 2015-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Beaver Lake Quarry, Inc. → Beaver Lake Quarry; 2015-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joli  Tewalt  et al → Beaver Lake Quarry, Inc.; 2015-08-01 to 1999-10-28; source msha-controller-operator-history
- **controller_controls_mine:** Joli  Tewalt  et al → Beaver Lake Quarry; 2015-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joli  Tewalt  et al → Beaver Lake Quarry Inc; 2015-08-01 to 1999-10-28; source msha-controller-operator-history
- **controller_controls_operator:** Denice  Tewalt  et al → Beaver Lake Quarry Inc; 2015-08-01 to 1999-10-28; source msha-controller-operator-history
- **controller_controls_operator:** Joli  Tewalt  et al → Beaver Lake Quarry, Inc.; 2015-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Denice  Tewalt  et al → Beaver Lake Quarry, Inc.; 2015-08-01 to current/open; source msha-controller-operator-history