{"schema_version":"secwatch.filing_event.v1","accession":"0001493152-21-023603","form_type":"8-K","ticker":"BHLL","cik":"0001407583","company_name":"Bunker Hill Mining Corp.","filed_at":"2021-09-24T23:59:59+00:00","discovered_at":"2026-05-14T18:04:17.973103+00:00","generated_at":"2026-06-29T01:30:05.866451+00:00","sec_items":["8.01","9.01"],"event_type":"other_material","sentiment":"positive","materiality_score":0.65,"calibrated_materiality_score":0.65,"confidence":"high","headline":"Bunker Hill PEA shows 42% NPV increase to $143M; AISC down 29% to $0.47/lb","bullets":["After-tax NPV (5%) of $143M vs. $101M in June PEA; IRR 35.2% with 2.6-year payback.","All-in sustaining cost (AISC) falls 29% to $0.47 per payable lb of zinc; cash costs down 33%.","Average annual free cash flow of $25.2M over extended 11-year mine life; 41% increase in total FCF.","Initial capital cost of $44M (incl. 20% contingency) for 18-month restart; total production of 990M zinc-equivalent lbs.","Metal price assumptions unchanged from April PEA ($1.15/lb Zn, $0.90/lb Pb, $20/oz Ag)."],"urls":{"canonical":"https://secwatch.observer/filing/0001493152-21-023603","json":"https://secwatch.observer/filing/0001493152-21-023603.json","markdown":"https://secwatch.observer/filing/0001493152-21-023603.md","text":"https://secwatch.observer/filing/0001493152-21-023603.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1407583/000149315221023603/0001493152-21-023603-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1407583/000149315221023603/form8-k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-29T01:30:05.866451+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}