# Relationship history for MSHA mine 3304098

Current hierarchy: **Forest Coal Company → Mountain Spring Coal Company → No 13**

- 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:** Johnson Robert A Sr → No 13; 1975-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Johnson Mining Company → No 13; 1987-04-01 to 1988-03-29; source msha-controller-operator-history
- **controller_controls_operator:** Johnson Robert A Sr → Johnson Mining Company; 1987-04-01 to 1988-03-29; source msha-controller-operator-history
- **operator_operates_mine:** Little Creek Mining Inc → No 13; 1988-03-30 to 1989-02-14; source msha-controller-operator-history
- **controller_controls_mine:** Tinnel Nelson → No 13; 1988-03-30 to 1989-02-14; source msha-controller-operator-history
- **controller_controls_operator:** Tinnel Nelson → Little Creek Mining Inc; 1988-03-30 to 1989-02-14; source msha-controller-operator-history
- **operator_operates_mine:** M & M Coal Company → No 13; 1989-02-15 to 1989-05-15; source msha-controller-operator-history
- **controller_controls_mine:** Mc Million Virgil & Jay Mc Kenzie → No 13; 1989-02-15 to 1989-05-15; source msha-controller-operator-history
- **controller_controls_operator:** Mc Million Virgil & Jay Mc Kenzie → M & M Coal Company; 1989-02-15 to 1989-05-15; source msha-controller-operator-history
- **controller_controls_mine:** Forest Coal Company → No 13; 1989-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Johnson Mining Company → No 13; 1989-05-16 to 1989-08-21; source msha-controller-operator-history
- **controller_controls_operator:** Johnson Robert A Sr → Johnson Mining Company; 1989-05-16 to 1989-08-21; source msha-controller-operator-history
- **operator_operates_mine:** P & G Mining → No 13; 1989-08-22 to 1990-04-22; source msha-controller-operator-history
- **controller_controls_mine:** Lambert Charles → No 13; 1989-08-22 to 1990-04-22; source msha-controller-operator-history
- **controller_controls_operator:** Lambert Charles → P & G Mining; 1989-08-22 to 1990-04-22; source msha-controller-operator-history
- **operator_operates_mine:** Beaver Creek Mining Inc → No 13; 1990-04-23 to 1990-07-12; source msha-controller-operator-history
- **controller_controls_mine:** Mamone Tony → No 13; 1990-04-23 to 1990-07-12; source msha-controller-operator-history
- **controller_controls_operator:** Mamone Tony → Beaver Creek Mining Inc; 1990-04-23 to 1990-07-12; source msha-controller-operator-history
- **operator_operates_mine:** Mountain Spring Coal Company → No 13; 1990-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Forest Coal Company → Mountain Spring Coal Company; 1990-07-13 to current/open; source msha-controller-operator-history