# Relationship history for MSHA mine 0102850

Current hierarchy: **Mc Coy Timothy D → Carbon Tech Mining Corp → Natural Bridge 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:** Maturo John A Jr & Timothy Mc Coy → Natural Bridge Mine; 1981-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Imac Energy Inc → Natural Bridge Mine; 1990-01-01 to 1991-02-06; source msha-controller-operator-history
- **controller_controls_operator:** Maturo John A Jr & Timothy Mc Coy → Imac Energy Inc; 1990-01-01 to 1991-02-06; source msha-controller-operator-history
- **controller_controls_mine:** Gage O G → Natural Bridge Mine; 1991-01-01 to 1994-09-03; source msha-controller-operator-history
- **operator_operates_mine:** Carbon Tech Mining Corp → Natural Bridge Mine; 1991-02-07 to 1994-09-03; source msha-controller-operator-history
- **controller_controls_operator:** Gage O G → Carbon Tech Mining Corp; 1991-02-07 to 1994-09-03; source msha-controller-operator-history
- **controller_controls_mine:** Mc Coy Timothy D → Natural Bridge Mine; 1994-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Carbon Tech Mining Corp → Natural Bridge Mine; 1994-09-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Coy Timothy D → Carbon Tech Mining Corp; 1994-09-04 to current/open; source msha-controller-operator-history