# Relationship history for MSHA mine 0102760

Current hierarchy: **Michael T  Costello → M S & R Equipment Company Inc → Merritt Rogers Mine**

- 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:** Costain Group PLC → Merritt Rogers Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Costain Coal Inc → Merritt Rogers Mine; 1988-02-01 to 1996-01-01; source msha-controller-operator-history
- **controller_controls_operator:** Costain Group PLC → Costain Coal Inc; 1988-02-01 to 1996-01-01; source msha-controller-operator-history
- **controller_controls_mine:** Kendall  Robison et al → Merritt Rogers Mine; 1991-03-01 to 2017-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Alabama Land & Mineral Corp → Merritt Rogers Mine; 1996-01-02 to 1999-01-11; source msha-controller-operator-history
- **controller_controls_mine:** Timothy L  McCoy → Merritt Rogers Mine; 1996-01-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Timothy L  McCoy → Alabama Land & Mineral Corp; 1996-01-02 to 1999-01-11; source msha-controller-operator-history
- **operator_operates_mine:** Hallmark Land Llc → Merritt Rogers Mine; 1999-01-12 to 2000-11-02; source msha-controller-operator-history
- **controller_controls_mine:** Hallmark Mary → Merritt Rogers Mine; 1999-01-12 to 2000-11-02; source msha-controller-operator-history
- **controller_controls_operator:** Hallmark Mary → Hallmark Land Llc; 1999-01-12 to 2000-11-02; source msha-controller-operator-history
- **operator_operates_mine:** M S & R Equipment Company Inc → Merritt Rogers Mine; 2000-11-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kendall  Robison et al → M S & R Equipment Company Inc; 2000-11-03 to 2017-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Otis R  Robison et al → M S & R Equipment Company Inc; 2000-11-03 to 2017-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Freddy  Hunt et al → Merritt Rogers Mine; 2017-09-01 to 2019-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Freddy  Hunt et al → M S & R Equipment Company Inc; 2017-09-01 to 2019-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Michael T  Costello et al → M S & R Equipment Company Inc; 2017-09-01 to 2019-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Michael T  Costello → Merritt Rogers Mine; 2019-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael T  Costello → M S & R Equipment Company Inc; 2019-08-01 to current/open; source msha-controller-operator-history