# Relationship history for MSHA mine 1509373

Current hierarchy: **Vernon Paul--Joe Barnett Jr → Noma Coal Company Inc → No 1 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

- **operator_operates_mine:** Ancoal Mining Corp → No 1 Mine; 1975-11-07 to 1980-03-10; source msha-controller-operator-history
- **controller_controls_mine:** Kincer Delmar → No 1 Mine; 1975-11-07 to 1980-03-10; source msha-controller-operator-history
- **controller_controls_operator:** Kincer Delmar → Ancoal Mining Corp; 1975-11-07 to 1980-03-10; source msha-controller-operator-history
- **controller_controls_mine:** Barber Oil Corp → No 1 Mine; 1976-09-21 to 1981-04-29; source msha-controller-operator-history
- **operator_operates_mine:** Paramont Mining Corp → No 1 Mine; 1980-03-11 to 1981-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Barber Oil Corp → Paramont Mining Corp; 1980-03-11 to 1981-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Paramont Mining Corp → No 1 Mine; 1981-04-01 to 1981-07-30; source msha-controller-operator-history
- **controller_controls_mine:** M A Hanna Company et al → No 1 Mine; 1981-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** M A Hanna Company et al → Paramont Mining Corp; 1981-04-01 to 1981-07-30; source msha-controller-operator-history
- **controller_controls_operator:** W R Grace Company et al → Paramont Mining Corp; 1981-04-01 to 1981-07-30; source msha-controller-operator-history
- **operator_operates_mine:** C & S Mining Corp → No 1 Mine; 1981-07-31 to 1982-01-27; source msha-controller-operator-history
- **controller_controls_mine:** Scarborough James C → No 1 Mine; 1981-07-31 to 1982-01-27; source msha-controller-operator-history
- **controller_controls_operator:** Scarborough James C → C & S Mining Corp; 1981-07-31 to 1982-01-27; source msha-controller-operator-history
- **operator_operates_mine:** Noma Coal Company Inc → No 1 Mine; 1982-01-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Vernon Paul--Joe Barnett Jr Et Al → No 1 Mine; 1982-01-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vernon Paul--Joe Barnett Jr Et Al → Noma Coal Company Inc; 1982-01-28 to current/open; source msha-controller-operator-history