# Relationship history for MSHA mine 2800034

Current hierarchy: **William  Weldon; Robert F  Weldon III; Norbert A  Weldon → Weldon Quarry Company LLC → Lake Hopatcong 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

- **operator_operates_mine:** Tri County Asphalt Corp → Lake Hopatcong Quarry; 1950-01-01 to 1989-11-01; source msha-controller-operator-history
- **controller_controls_mine:** George T  Tucker → Lake Hopatcong Quarry; 1950-01-01 to 1989-11-01; source msha-controller-operator-history
- **controller_controls_operator:** George T  Tucker → Tri County Asphalt Corp; 1950-01-01 to 1989-11-01; source msha-controller-operator-history
- **controller_controls_mine:** Tarmac Plc → Lake Hopatcong Quarry; 1984-12-28 to 2000-10-02; source msha-controller-operator-history
- **operator_operates_mine:** Wimpey Minerals Usa Inc → Lake Hopatcong Quarry; 1989-11-02 to 1996-03-26; source msha-controller-operator-history
- **controller_controls_mine:** George Wimpey Plc → Lake Hopatcong Quarry; 1989-11-02 to 1996-03-26; source msha-controller-operator-history
- **controller_controls_operator:** George Wimpey Plc → Wimpey Minerals Usa Inc; 1989-11-02 to 1996-03-26; source msha-controller-operator-history
- **operator_operates_mine:** Tarmac America Inc → Lake Hopatcong Quarry; 1996-03-27 to 1996-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Tarmac Plc → Tarmac America Inc; 1996-03-27 to 1996-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Weldon Quarry Company LLC → Lake Hopatcong Quarry; 1997-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Richard  Weldon et al → Lake Hopatcong Quarry; 1997-01-01 to 2023-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Richard  Weldon et al → Weldon Quarry Company LLC; 1997-01-01 to 2023-04-30; source msha-controller-operator-history
- **controller_controls_operator:** William  Weldon et al → Weldon Quarry Company LLC; 1997-01-01 to 2023-04-30; source msha-controller-operator-history
- **controller_controls_mine:** William  Weldon et al → Lake Hopatcong Quarry; 2023-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William  Weldon et al → Weldon Quarry Company LLC; 2023-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert F  Weldon III et al → Weldon Quarry Company LLC; 2023-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Norbert A  Weldon et al → Weldon Quarry Company LLC; 2023-05-01 to current/open; source msha-controller-operator-history