# Relationship history for MSHA mine 3000821

Current hierarchy: **Dave  Burrell → Burrell's Excavating, Inc. → North Norwich Bundy 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

- **operator_operates_mine:** Bundy Concrete Company → North Norwich Bundy Pit; 1950-01-01 to 1983-07-20; source msha-controller-operator-history
- **controller_controls_mine:** Harold A  Bundy  et al → North Norwich Bundy Pit; 1950-01-01 to 1983-07-20; source msha-controller-operator-history
- **controller_controls_operator:** Harold A  Bundy  et al → Bundy Concrete Company; 1950-01-01 to 1983-07-20; source msha-controller-operator-history
- **operator_operates_mine:** Bundy Sand & Gravel Inc → North Norwich Bundy Pit; 1983-07-21 to 1991-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Michael V  Mirabito  et al → North Norwich Bundy Pit; 1983-07-21 to 1991-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Michael V  Mirabito  et al → Bundy Sand & Gravel Inc; 1983-07-21 to 1991-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Chenango Asphalt Products → North Norwich Bundy Pit; 1991-09-01 to 2018-05-01; source msha-controller-operator-history
- **controller_controls_mine:** Emil J  Galasso et al → North Norwich Bundy Pit; 1991-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Emil J  Galasso et al → Chenango Asphalt Products; 1991-09-01 to 2018-05-01; source msha-controller-operator-history
- **controller_controls_mine:** Dave  Burrell  et al → North Norwich Bundy Pit; 1999-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Burrell's Excavating, Inc. → North Norwich Bundy Pit; 2018-05-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dave  Burrell  et al → Burrell's Excavating, Inc.; 2018-05-02 to current/open; source msha-controller-operator-history