{"data":{"schemaVersion":"realm.mine-profile.v1","generatedAt":"2026-10-13T11:26:59.401Z","identity":{"mine_id":"4500659","name":"MATHESON PIT","status":"Abandoned","status_date":"1999-09-14","mine_type":"Surface","coal_metal":"M","commodity":"Construction Sand and Gravel","state":"WA","county":"Benton","nearest_town":"","operator_id":"L11595","operator_name":"Acme Materials & Construction Company","controller_id":"M00521","controller_name":"Hanson PLC","district":"M7","office":"Kent WA Field Office","employees":0,"latitude":null,"longitude":null},"coverage":{"contributingSources":4,"registeredSources":20,"sourceRows":6},"relationships":{"schemaVersion":"realm.temporal-relationships.v1","temporalSemantics":{"validTime":{"granularity":"date","bounds":"inclusive","nullStart":"start date not published in the upstream history row","nullEnd":"open-ended in the upstream history row; not independent proof of present control"},"transactionTime":{"observedAt":"2026-10-13T11:19:05.459773+00:00","meaning":"time the checksum-addressed MDRS artifacts were observed by the PostgreSQL ingestion"},"derivation":{"controllerControlsOperator":"intersection of controller and operator valid-time intervals evidenced through this mine","currentIdentity":"current controller and operator are asserted only by the MDRS Mines snapshot"}},"current":{"mine":{"type":"mine","id":"4500659","name":"MATHESON PIT"},"operator":{"type":"operator","id":"L11595","name":"Acme Materials & Construction Company"},"controller":{"type":"controller","id":"M00521","name":"Hanson PLC"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L01884","name":"Acme Concrete Company"},"object":{"type":"mine","id":"4500659","name":"MATHESON PIT"},"validFrom":"1950-01-01","validTo":"1988-07-14","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500659|L01884|1950-01-01|1988-07-14"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M01697","name":"Donald H  Herak"},"object":{"type":"mine","id":"4500659","name":"MATHESON PIT"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500659|M01697|1950-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M01697","name":"Donald H  Herak"},"object":{"type":"operator","id":"L01884","name":"Acme Concrete Company"},"validFrom":"1950-01-01","validTo":"1988-07-14","current":false,"derived":true,"evidenceMineId":"4500659","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500659|L01884|1950-01-01|M01697|1950-01-01|120381"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L10395","name":"Acme Concrete Company"},"object":{"type":"mine","id":"4500659","name":"MATHESON PIT"},"validFrom":"1988-07-15","validTo":"1988-11-13","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500659|L10395|1988-07-15|1988-11-13"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00002","name":"Koppers Company Inc"},"object":{"type":"mine","id":"4500659","name":"MATHESON PIT"},"validFrom":"1988-07-15","validTo":"1988-11-13","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500659|M00002|1988-07-15|1988-11-13"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00002","name":"Koppers Company Inc"},"object":{"type":"operator","id":"L10395","name":"Acme Concrete Company"},"validFrom":"1988-07-15","validTo":"1988-11-13","current":false,"derived":true,"evidenceMineId":"4500659","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500659|L10395|1988-07-15|M00002|1988-07-15|100422"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L11595","name":"Acme Materials & Construction Company"},"object":{"type":"mine","id":"4500659","name":"MATHESON PIT"},"validFrom":"1988-11-14","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500659|L11595|1988-11-14|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00521","name":"Hanson PLC"},"object":{"type":"mine","id":"4500659","name":"MATHESON PIT"},"validFrom":"1988-11-14","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500659|M00521|1988-11-14|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00521","name":"Hanson PLC"},"object":{"type":"operator","id":"L11595","name":"Acme Materials & Construction Company"},"validFrom":"1988-11-14","validTo":null,"current":true,"derived":true,"evidenceMineId":"4500659","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500659|L11595|1988-11-14|M00521|1988-11-14|112490"}}],"coverage":{"historyRecords":3,"edgeCount":9,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"sources":[{"id":"msha-addresses","name":"Addresses of Record","domains":["identity","logistics"],"products":["entity resolution","address history","facility geocoding"],"rowCount":1,"firstDate":"1999-09-14","lastDate":"1999-09-14","metrics":{},"periods":{},"recentRecords":[]},{"id":"msha-controller-operator-history","name":"Controller and Operator History","domains":["identity","compliance"],"products":["historical ownership attribution","operator transitions","valid-time joins"],"rowCount":3,"firstDate":"1950-01-01","lastDate":"1988-11-14","metrics":{"recentRows":0,"currentOperatorTenures":1,"completedOperatorTenures":2},"periods":{},"recentRecords":[]},{"id":"msha-mine-production-quarterly","name":"Mine Employment and Production — Quarterly","domains":["production","safety","compliance"],"products":["production trend","employee hours","rate denominators","seasonality"],"rowCount":1,"firstDate":null,"lastDate":null,"metrics":{},"periods":{"2000-Q1":{"hours":0,"employees":0,"production":0}},"recentRecords":[]},{"id":"msha-mines","name":"Mines","domains":["identity","production","logistics"],"products":["mine identity","status","commodity","location","operator and controller"],"rowCount":1,"firstDate":null,"lastDate":null,"metrics":{},"periods":{},"recentRecords":[]}],"safety":{"href":"/api/v1/mines/4500659/safety","description":"Full-period safety series, top CFR sections and paginated activity. Requires PostgreSQL."},"silica":{"href":"/api/v1/mines/4500659/silica","description":"Dedicated silica records, measurements, sample status and trends. Defaults to the snapshot year; use year=all for history."},"externalContext":{"eia":null,"title30":{"snapshot":{"chapterCount":6,"featuredSectionCount":100,"latestAmendedOn":"2026-08-14","latestIssueDate":"2026-08-14","partCount":206,"sectionCount":5954,"upToDateAsOf":"2026-08-19"},"regulations":[],"fullCorpus":"/data/title30-sections.json"}}},"meta":{"representation":"json","mineId":"4500659","dataSource":"postgres","snapshotId":"2026-10-13T11:19:05.459773+00:00","completedAt":"2026-10-13T11:26:59.401Z","sourceCount":20,"totalRows":17906804}}