{"data":{"schemaVersion":"realm.mine-profile.v1","generatedAt":"2026-10-13T11:26:59.401Z","identity":{"mine_id":"1901050","name":"NORDBERG","status":"Abandoned","status_date":"2003-01-06","mine_type":"Surface","coal_metal":"M","commodity":"Construction Sand and Gravel","state":"MA","county":"Worcester","nearest_town":"BILLERICA","operator_id":"L14887","operator_name":"Pitcherville Sand & Gravel Inc","controller_id":"M11324","controller_name":"Norman  Brown","district":"M2","office":"Portsmouth NH Field Office","employees":0,"latitude":null,"longitude":null},"coverage":{"contributingSources":9,"registeredSources":20,"sourceRows":34},"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":"1901050","name":"NORDBERG"},"operator":{"type":"operator","id":"L14887","name":"Pitcherville Sand & Gravel Inc"},"controller":{"type":"controller","id":"M11324","name":"Norman  Brown"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L14887","name":"Pitcherville Sand & Gravel Inc"},"object":{"type":"mine","id":"1901050","name":"NORDBERG"},"validFrom":"1996-10-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1901050|L14887|1996-10-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M11324","name":"Norman  Brown"},"object":{"type":"mine","id":"1901050","name":"NORDBERG"},"validFrom":"1996-10-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1901050|M11324|1996-10-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M11324","name":"Norman  Brown"},"object":{"type":"operator","id":"L14887","name":"Pitcherville Sand & Gravel Inc"},"validFrom":"1996-10-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"1901050","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1901050|L14887|1996-10-01|M11324|1996-10-01|151191"}}],"coverage":{"historyRecords":1,"edgeCount":3,"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":"2003-01-06","lastDate":"2003-01-06","metrics":{},"periods":{},"recentRecords":[]},{"id":"msha-assessed-violations","name":"Assessed Violations","domains":["compliance","legal"],"products":["penalty lifecycle","paid and outstanding amounts","assessment aging"],"rowCount":5,"firstDate":"2000-10-18","lastDate":"2001-11-15","metrics":{"ss":3,"delinquent":5,"recentRows":0,"paidPenalty":332,"proposedPenalty":332,"currentAssessment":332},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"98632","VIOLATION_NO":"7746184","ISSUE_DT":"11/15/2001","CFR_STANDARD_CD":"56.9301","SIG_SUB_IND":"Y","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"66.00","CURRENT_ASSESSMENT_AMT":"66.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2001-11-15"},{"SOURCE_ROW_NUMBER":"98631","VIOLATION_NO":"7746183","ISSUE_DT":"11/15/2001","CFR_STANDARD_CD":"56.12032","SIG_SUB_IND":"N","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"55.00","CURRENT_ASSESSMENT_AMT":"55.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2001-11-15"},{"SOURCE_ROW_NUMBER":"98630","VIOLATION_NO":"7746182","ISSUE_DT":"11/15/2001","CFR_STANDARD_CD":"56.14112(b)","SIG_SUB_IND":"Y","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"66.00","CURRENT_ASSESSMENT_AMT":"66.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2001-11-15"},{"SOURCE_ROW_NUMBER":"91240","VIOLATION_NO":"7733700","ISSUE_DT":"10/18/2000","CFR_STANDARD_CD":"62.120","SIG_SUB_IND":"N","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"55.00","CURRENT_ASSESSMENT_AMT":"55.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2000-10-18"},{"SOURCE_ROW_NUMBER":"91239","VIOLATION_NO":"7733699","ISSUE_DT":"10/18/2000","CFR_STANDARD_CD":"56.14107(a)","SIG_SUB_IND":"Y","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"90.00","CURRENT_ASSESSMENT_AMT":"90.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2000-10-18"}]},{"id":"msha-controller-operator-history","name":"Controller and Operator History","domains":["identity","compliance"],"products":["historical ownership attribution","operator transitions","valid-time joins"],"rowCount":1,"firstDate":"1996-10-01","lastDate":"1996-10-01","metrics":{"recentRows":0,"currentOperatorTenures":1,"completedOperatorTenures":0},"periods":{},"recentRecords":[]},{"id":"msha-inspections","name":"Inspections","domains":["safety","compliance"],"products":["inspection mix","on-site hours","event context","citation rate denominator"],"rowCount":3,"firstDate":"2000-04-11","lastDate":"2001-11-15","metrics":{"inspectors":3,"recentRows":0,"onSiteHours":30,"inspectionHours":46,"inspectionSamples":0},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"45879","EVENT_NO":"0739762","INSPECTION_BEGIN_DT":"11/15/2001","INSPECTION_END_DT":"11/15/2001","ACTIVITY_CODE":"01","ACTIVITY":"REGULAR INSPECTION","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"13","SUM_TOTAL_ON_SITE_HOURS":"6","sourceDate":"2001-11-15"},{"SOURCE_ROW_NUMBER":"618347","EVENT_NO":"0725988","INSPECTION_BEGIN_DT":"10/18/2000","INSPECTION_END_DT":"10/20/2000","ACTIVITY_CODE":"01","ACTIVITY":"REGULAR INSPECTION","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"15","SUM_TOTAL_ON_SITE_HOURS":"12","sourceDate":"2000-10-18"},{"SOURCE_ROW_NUMBER":"12892","EVENT_NO":"0749126","INSPECTION_BEGIN_DT":"04/11/2000","INSPECTION_END_DT":"04/11/2000","ACTIVITY_CODE":"01","ACTIVITY":"REGULAR INSPECTION","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"18","SUM_TOTAL_ON_SITE_HOURS":"12","sourceDate":"2000-04-11"}]},{"id":"msha-mine-production-quarterly","name":"Mine Employment and Production — Quarterly","domains":["production","safety","compliance"],"products":["production trend","employee hours","rate denominators","seasonality"],"rowCount":14,"firstDate":null,"lastDate":null,"metrics":{},"periods":{"2003-Q1":{"hours":0,"employees":0,"production":0},"2002-Q4":{"hours":0,"employees":0,"production":0},"2002-Q3":{"hours":0,"employees":0,"production":0},"2002-Q2":{"hours":585,"employees":1,"production":0},"2002-Q1":{"hours":0,"employees":0,"production":0},"2001-Q4":{"hours":1050,"employees":2,"production":0},"2001-Q3":{"hours":1170,"employees":2,"production":0},"2001-Q2":{"hours":1180,"employees":2,"production":0},"2001-Q1":{"hours":0,"employees":0,"production":0},"2000-Q4":{"hours":1710,"employees":3,"production":0},"2000-Q2":{"hours":0,"employees":0,"production":0},"2000-Q1":{"hours":0,"employees":0,"production":0}},"recentRecords":[]},{"id":"msha-mine-production-yearly","name":"Mine Employment and Production — Yearly","domains":["production","safety","compliance"],"products":["annual trend","backfill","quarterly reconciliation"],"rowCount":3,"firstDate":null,"lastDate":null,"metrics":{},"periods":{"2000":{"hours":1710,"employees":3,"production":0},"2001":{"hours":3400,"employees":2,"production":0},"2002":{"hours":585,"employees":1,"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":[]},{"id":"msha-personal-health-samples","name":"Metal and Nonmetal Personal Health Samples","domains":["health","safety"],"products":["personal exposure trend","occupation patterns","analyte coverage"],"rowCount":1,"firstDate":"2000-10-18","lastDate":"2000-10-18","metrics":{"recentRows":0,"actionTaken":1,"maxExposureRatio":0,"overExposureLimit":0,"exposureRatioTotal":0},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"202754","EVENT_NO":"0725988","SAMPLE_NO":"800000200000205000","SAMPLE_DATE":"10/18/2000","CONTAMINANT_DESC":"Respirable dust, <.1mg","CONCENTRATION":"0000.00","EXPOSURE_LIMIT":"0000.00","C_OVER_E":"00.00","JOB_CD_DESC":"Crusher Oper/Worker","ACTION_TAKEN_DESC":"NO ACTION","sourceDate":"2000-10-18"}]},{"id":"msha-violations","name":"Violations","domains":["compliance","safety","legal"],"products":["citation and order record","condition text","Title 30 linkage","abatement patterns"],"rowCount":5,"firstDate":"2000-10-18","lastDate":"2001-11-15","metrics":{"ss":3,"amountDue":332,"contested":0,"amountPaid":332,"recentRows":0,"section104d":0,"unterminated":0,"proposedPenalty":332},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"1276357","VIOLATION_NO":"7746184","VIOLATION_ISSUE_DT":"11/15/2001","SIG_SUB":"Y","PART_SECTION":"56.9301","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Reasonably","INJ_ILLNESS":"LostDays","NO_AFFECTED":"1","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"11/15/2001","PROPOSED_PENALTY":"66","AMOUNT_DUE":"66","AMOUNT_PAID":"66","CONTESTED_IND":"N","sourceDate":"2001-11-15"},{"SOURCE_ROW_NUMBER":"1276356","VIOLATION_NO":"7746183","VIOLATION_ISSUE_DT":"11/15/2001","SIG_SUB":"N","PART_SECTION":"56.12032","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Unlikely","INJ_ILLNESS":"LostDays","NO_AFFECTED":"1","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"11/15/2001","PROPOSED_PENALTY":"55","AMOUNT_DUE":"55","AMOUNT_PAID":"55","CONTESTED_IND":"N","sourceDate":"2001-11-15"},{"SOURCE_ROW_NUMBER":"1276355","VIOLATION_NO":"7746182","VIOLATION_ISSUE_DT":"11/15/2001","SIG_SUB":"Y","PART_SECTION":"56.14112(b)","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Reasonably","INJ_ILLNESS":"LostDays","NO_AFFECTED":"1","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"11/15/2001","PROPOSED_PENALTY":"66","AMOUNT_DUE":"66","AMOUNT_PAID":"66","CONTESTED_IND":"N","sourceDate":"2001-11-15"},{"SOURCE_ROW_NUMBER":"1276354","VIOLATION_NO":"7733700","VIOLATION_ISSUE_DT":"10/18/2000","SIG_SUB":"N","PART_SECTION":"62.120","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Unlikely","INJ_ILLNESS":"Permanent","NO_AFFECTED":"1","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"11/15/2001","PROPOSED_PENALTY":"55","AMOUNT_DUE":"55","AMOUNT_PAID":"55","CONTESTED_IND":"N","sourceDate":"2000-10-18"},{"SOURCE_ROW_NUMBER":"1276353","VIOLATION_NO":"7733699","VIOLATION_ISSUE_DT":"10/18/2000","SIG_SUB":"Y","PART_SECTION":"56.14107(a)","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Reasonably","INJ_ILLNESS":"Permanent","NO_AFFECTED":"1","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"10/19/2000","PROPOSED_PENALTY":"90","AMOUNT_DUE":"90","AMOUNT_PAID":"90","CONTESTED_IND":"N","sourceDate":"2000-10-18"}]}],"safety":{"href":"/api/v1/mines/1901050/safety","description":"Full-period safety series, top CFR sections and paginated activity. Requires PostgreSQL."},"silica":{"href":"/api/v1/mines/1901050/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":[{"chapter":"I","heading":"Dump site restraints.","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9301","part":"56","subchapter":"K","subpart":"H","id":"56.9301","citation":"30 CFR 56.9301","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","subchapterHeading":"SUBCHAPTER K—METAL AND NONMETAL MINE SAFETY AND HEALTH","partHeading":"PART 56—SAFETY AND HEALTH STANDARDS—SURFACE METAL AND NONMETAL MINES","subpartHeading":"","text":null,"occurrenceCount":1},{"chapter":"I","heading":"Inspection and cover plates.","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12032","part":"56","subchapter":"K","subpart":"K","id":"56.12032","citation":"30 CFR 56.12032","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","subchapterHeading":"SUBCHAPTER K—METAL AND NONMETAL MINE SAFETY AND HEALTH","partHeading":"PART 56—SAFETY AND HEALTH STANDARDS—SURFACE METAL AND NONMETAL MINES","subpartHeading":"","text":null,"occurrenceCount":1},{"chapter":"I","heading":"Construction and maintenance of guards.","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14112","part":"56","subchapter":"K","subpart":"M","id":"56.14112","citation":"30 CFR 56.14112","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","subchapterHeading":"SUBCHAPTER K—METAL AND NONMETAL MINE SAFETY AND HEALTH","partHeading":"PART 56—SAFETY AND HEALTH STANDARDS—SURFACE METAL AND NONMETAL MINES","subpartHeading":"","text":null,"occurrenceCount":1},{"chapter":"I","heading":"Action level.","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-M/part-62/section-62.120","part":"62","subchapter":"M","subpart":"","id":"62.120","citation":"30 CFR 62.120","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","subchapterHeading":"SUBCHAPTER M—UNIFORM MINE HEALTH REGULATIONS","partHeading":"PART 62—OCCUPATIONAL NOISE EXPOSURE","subpartHeading":"","text":null,"occurrenceCount":1},{"chapter":"I","heading":"Moving machine parts.","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107","part":"56","subchapter":"K","subpart":"M","id":"56.14107","citation":"30 CFR 56.14107","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","subchapterHeading":"SUBCHAPTER K—METAL AND NONMETAL MINE SAFETY AND HEALTH","partHeading":"PART 56—SAFETY AND HEALTH STANDARDS—SURFACE METAL AND NONMETAL MINES","subpartHeading":"","text":null,"occurrenceCount":1}],"fullCorpus":"/data/title30-sections.json"}}},"meta":{"representation":"json","mineId":"1901050","dataSource":"postgres","snapshotId":"2026-10-13T11:19:05.459773+00:00","completedAt":"2026-10-13T11:26:59.401Z","sourceCount":20,"totalRows":17906804}}