---
schema_version: "secwatch.filing_event.v1"
accession: "0001493152-22-014580"
form_type: "8-K"
ticker: "BHLL"
cik: "0001407583"
company_name: "Bunker Hill Mining Corp."
filed_at: "2022-05-20T23:59:59+00:00"
generated_at: "2026-06-25T08:39:05.844056+00:00"
event_type: "other_material"
sentiment: "positive"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Bunker Hill Mining advances underground decline, water treatment, and mill relocation at Idaho mine

## Summary
- Decline from 5 Level to 6 Level on track for Q3 2022 completion; ventilation fans operational for first time in 40 years.
- Pilot water treatment plant now operational; testing during spring freshet to inform full-scale system.
- Surface yard clean-up prepares site for Pend Oreille mill relocation; final location to be set in PFS.
- Prefeasibility study results on track for June 2022, along with formal construction decision.
- Update on Pend Oreille mill closing and demobilization expected in May 2022.

## SEC filing metadata
- accession: 0001493152-22-014580
- form_type: 8-K
- ticker: BHLL
- cik: 0001407583
- company_name: Bunker Hill Mining Corp.
- filed_at: 2022-05-20T23:59:59+00:00
- event_type: other_material
- sentiment: positive
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1407583/000149315222014580/0001493152-22-014580-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1407583/000149315222014580/form8-k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001493152-22-014580
- JSON: https://secwatch.observer/filing/0001493152-22-014580.json
- Plain text: https://secwatch.observer/filing/0001493152-22-014580.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.