{"@type": "dcat:Dataset", "accessLevel": "public", "accrualPeriodicity": "R/PT1S", "bureauCode": ["000:00"], "contactPoint": {"@type": "vcard:Contact", "fn": "Victor Yu", "hasEmail": "mailto:yu.victor@dol.gov"}, "dataQuality": true, "describedBy": "https://arlweb.msha.gov/OpenGovernmentData/DataSets/ContractorProdQuarterly_Definition_File.txt", "describedByType": "text/plain", "description": "Contains employment and coal production reported by contractors for each quarter in a calendar year, by subunit and mine ID. The subunit code identifies the location or operation of the mine relating to the: (01) Underground; (02) Surface at underground; (03) Strip, quarry, open pit; (04) Auger; (05) Culm bank/refuse pile; (06) Dredge; (12) Other mining; (17) Independent shops or yards; (30) Mill operation/preparation plant; (99) Office workers at mine site.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://www.msha.gov/mine-data-retrieval-system", "title": "Mine Data Retrieval System - Explore MSHA Datasets"}], "identifier": "MSHA-19-012:030-168", "keyword": ["MSHA", "Part 50", "Part 50 data", "mining", "mining contractor employment", "mining contractor production"], "landingPage": "https://www.msha.gov/mine-data-retrieval-system", "language": ["en-US"], "modified": "2026-03-12T12:22:35.616Z", "programCode": ["000:000"], "publisher": {"@type": "org:Organization", "name": "Mine Safety and Health Administration", "subOrganizationOf": {"@type": "org:Organization", "name": "Mine Safety and Health Administration"}}, "rights": "true", "temporal": "1983-01-01/2025-12-31", "title": "Contractor Employment and Production - Quarterly"}