# Relationship history for MSHA mine 4607982

Current hierarchy: **Dulaney Lowell J → Dakota Creek Corp → Waneta South Surface 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** A F Budge Mining Ltd → Waneta South Surface Mine; 1989-03-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Browning Leon → Waneta South Surface Mine; 1989-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Fenton Mining Corp → Waneta South Surface Mine; 1990-12-01 to 1991-04-21; source msha-controller-operator-history
- **controller_controls_operator:** Browning Leon → Fenton Mining Corp; 1990-12-01 to 1991-04-21; source msha-controller-operator-history
- **operator_operates_mine:** Elk River Sewell Coal Company Inc → Waneta South Surface Mine; 1991-04-22 to 1992-10-05; source msha-controller-operator-history
- **controller_controls_operator:** A F Budge Mining Ltd → Elk River Sewell Coal Company Inc; 1991-04-22 to 1992-10-05; source msha-controller-operator-history
- **operator_operates_mine:** Dakota Creek Corp → Waneta South Surface Mine; 1992-10-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dulaney Lowell J → Waneta South Surface Mine; 1992-10-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dulaney Lowell J → Dakota Creek Corp; 1992-10-06 to current/open; source msha-controller-operator-history