{"@context":{"@vocab":"https://schema.org/"},"@type":"ItemList","@id":"https://api.morvs.ai/api/v1/msha/violations/check?name=Northstar%20Materials%2C%20Inc.","name":"Northstar Materials, Inc.","_source":{"data_provider":"AI Analytics","brand_name":"MORVS","brand_url":"https://morvs.ai/","data_provider_url":"https://api.morvs.ai","license":"https://creativecommons.org/publicdomain/zero/1.0/","primary_source":"https://arlweb.msha.gov/OpenGovernmentData/OGIMSHA.asp","generated_at":"2026-10-04T10:52:48.156Z"},"summary":{"total_violations":273,"significant_and_substantial":47,"proposed_penalty_usd":53281,"amount_paid_usd":43546},"top_violated_rules":[{"part_section":"56.14107(a)","n":48},{"part_section":"56.12004","n":35},{"part_section":"56.14100(b)","n":13},{"part_section":"56.12032","n":9},{"part_section":"56.14101(a)(2)","n":8},{"part_section":"56.14132(a)","n":7},{"part_section":"56.14112(b)","n":7},{"part_section":"56.11002","n":7},{"part_section":"56.1000","n":7},{"part_section":"56.14112(a)(1)","n":6}],"recent_violations":[{"violation_no":"6159148","issue_date":"12/08/2003","mine_id":"2103185","controller_name":"MDU Resources Group Inc","violator_name":"Northstar Materials Inc dba Knife River Materials","sig_sub":"N","part_section":"50.30(a)","negligence":"LowNegligence","proposed_penalty":60,"canonical_url":"https://api.morvs.ai/mine-violation/6159148"},{"violation_no":"6159584","issue_date":"12/01/2004","mine_id":"2103127","controller_name":"MDU Resources Group Inc","violator_name":"Northstar Materials Inc dba Knife River Materials","sig_sub":"N","part_section":"56.14107(a)","negligence":"ModNegligence","proposed_penalty":60,"canonical_url":"https://api.morvs.ai/mine-violation/6159584"},{"violation_no":"6159583","issue_date":"12/01/2004","mine_id":"2103185","controller_name":"MDU Resources Group Inc","violator_name":"Northstar Materials Inc dba Knife River Materials","sig_sub":"N","part_section":"56.14107(a)","negligence":"ModNegligence","proposed_penalty":60,"canonical_url":"https://api.morvs.ai/mine-violation/6159583"},{"violation_no":"6159582","issue_date":"12/01/2004","mine_id":"2103248","controller_name":"MDU Resources Group Inc","violator_name":"Northstar Materials Inc dba Knife River Materials","sig_sub":"N","part_section":"56.16006","negligence":"ModNegligence","proposed_penalty":60,"canonical_url":"https://api.morvs.ai/mine-violation/6159582"},{"violation_no":"8946671","issue_date":"11/30/2016","mine_id":"2102718","controller_name":"MDU Resources Group Inc","violator_name":"Northstar Materials Inc dba Knife River Materials","sig_sub":"Y","part_section":"56.15005","negligence":"LowNegligence","proposed_penalty":593,"canonical_url":"https://api.morvs.ai/mine-violation/8946671"},{"violation_no":"6176784","issue_date":"11/30/2006","mine_id":"2102718","controller_name":"MDU Resources Group Inc","violator_name":"Northstar Materials Inc dba Knife River Materials","sig_sub":"N","part_section":"56.12004","negligence":"LowNegligence","proposed_penalty":60,"canonical_url":"https://api.morvs.ai/mine-violation/6176784"},{"violation_no":"6176785","issue_date":"11/30/2006","mine_id":"2102718","controller_name":"MDU Resources Group Inc","violator_name":"Northstar Materials Inc dba Knife River Materials","sig_sub":"N","part_section":"56.12004","negligence":"LowNegligence","proposed_penalty":60,"canonical_url":"https://api.morvs.ai/mine-violation/6176785"},{"violation_no":"8946670","issue_date":"11/29/2016","mine_id":"2102718","controller_name":"MDU Resources Group Inc","violator_name":"Northstar Materials Inc dba Knife River Materials","sig_sub":null,"part_section":null,"negligence":null,"proposed_penalty":null,"canonical_url":"https://api.morvs.ai/mine-violation/8946670"},{"violation_no":"8946672","issue_date":"11/29/2016","mine_id":"2102718","controller_name":"MDU Resources Group Inc","violator_name":"Northstar Materials Inc dba Knife River Materials","sig_sub":"Y","part_section":"56.14105","negligence":"LowNegligence","proposed_penalty":593,"canonical_url":"https://api.morvs.ai/mine-violation/8946672"},{"violation_no":"8946673","issue_date":"11/29/2016","mine_id":"2102718","controller_name":"MDU Resources Group Inc","violator_name":"Northstar Materials Inc dba Knife River Materials","sig_sub":"Y","part_section":"56.14110","negligence":"ModNegligence","proposed_penalty":145,"canonical_url":"https://api.morvs.ai/mine-violation/8946673"},{"violation_no":"8946678","issue_date":"11/29/2016","mine_id":"2103127","controller_name":"MDU Resources Group Inc","violator_name":"Northstar Materials Inc dba Knife River Materials","sig_sub":"N","part_section":"56.14100(b)","negligence":"LowNegligence","proposed_penalty":116,"canonical_url":"https://api.morvs.ai/mine-violation/8946678"},{"violation_no":"8946679","issue_date":"11/29/2016","mine_id":"2103127","controller_name":"MDU Resources Group Inc","violator_name":"Northstar Materials Inc dba Knife River Materials","sig_sub":"N","part_section":"56.11001","negligence":"ModNegligence","proposed_penalty":114,"canonical_url":"https://api.morvs.ai/mine-violation/8946679"},{"violation_no":"8946674","issue_date":"11/29/2016","mine_id":"2103185","controller_name":"MDU Resources Group Inc","violator_name":"Northstar Materials Inc dba Knife River Materials","sig_sub":"N","part_section":"56.12004","negligence":"LowNegligence","proposed_penalty":114,"canonical_url":"https://api.morvs.ai/mine-violation/8946674"},{"violation_no":"8946675","issue_date":"11/29/2016","mine_id":"2103185","controller_name":"MDU Resources Group Inc","violator_name":"Northstar Materials Inc dba Knife River Materials","sig_sub":"N","part_section":"56.14101(a)(2)","negligence":"LowNegligence","proposed_penalty":116,"canonical_url":"https://api.morvs.ai/mine-violation/8946675"},{"violation_no":"8946676","issue_date":"11/29/2016","mine_id":"2103185","controller_name":"MDU Resources Group Inc","violator_name":"Northstar Materials Inc dba Knife River Materials","sig_sub":"N","part_section":"56.14100(d)","negligence":"LowNegligence","proposed_penalty":114,"canonical_url":"https://api.morvs.ai/mine-violation/8946676"},{"violation_no":"8946677","issue_date":"11/29/2016","mine_id":"2103248","controller_name":"MDU Resources Group Inc","violator_name":"Northstar Materials Inc dba Knife River Materials","sig_sub":"N","part_section":"56.14112(b)","negligence":"ModNegligence","proposed_penalty":114,"canonical_url":"https://api.morvs.ai/mine-violation/8946677"},{"violation_no":"8740727","issue_date":"11/25/2013","mine_id":"2103248","controller_name":"MDU Resources Group Inc","violator_name":"Northstar Materials Inc dba Knife River Materials","sig_sub":"N","part_section":"56.4602","negligence":"ModNegligence","proposed_penalty":176,"canonical_url":"https://api.morvs.ai/mine-violation/8740727"},{"violation_no":"9481141","issue_date":"11/23/2020","mine_id":"2103870","controller_name":"MDU Resources Group Inc","violator_name":"Northstar Materials Inc dba Knife River Materials","sig_sub":"N","part_section":"56.14100(b)","negligence":"ModNegligence","proposed_penalty":123,"canonical_url":"https://api.morvs.ai/mine-violation/9481141"},{"violation_no":"9481142","issue_date":"11/23/2020","mine_id":"2103870","controller_name":"MDU Resources Group Inc","violator_name":"Northstar Materials Inc dba Knife River Materials","sig_sub":"N","part_section":"56.12005","negligence":"ModNegligence","proposed_penalty":123,"canonical_url":"https://api.morvs.ai/mine-violation/9481142"},{"violation_no":"8888880","issue_date":"11/19/2015","mine_id":"2103127","controller_name":"MDU Resources Group Inc","violator_name":"Northstar Materials Inc dba Knife River Materials","sig_sub":"N","part_section":"56.13015(a)","negligence":"ModNegligence","proposed_penalty":100,"canonical_url":"https://api.morvs.ai/mine-violation/8888880"}]}