---
schema_version: "secwatch.filing_event.v1"
accession: "0001493152-22-029352"
form_type: "8-K"
ticker: "BHLL"
cik: "0001407583"
company_name: "Bunker Hill Mining Corp."
filed_at: "2022-10-21T23:59:59+00:00"
generated_at: "2026-06-23T01:54:14.605469+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 announces PFS filing, $3M liquidity boost from new EPA bond

## Summary
- Filed independent Preliminary Feasibility Study for Bunker Hill Mine (Idaho) with no material differences from Sept 6 update.
- Secured $5M payment bond to replace US EPA letter of credit; restricted cash collateral reduced by $3M, improving liquidity.
- Awarded water management contract to MineWater LLC through Sep 2023; $60k cash and 1,599,150 RSUs as consideration.
- Payment bond to increase to $7M upon Sprott stream advance, targeting additional $2M liquidity improvement.

## SEC filing metadata
- accession: 0001493152-22-029352
- form_type: 8-K
- ticker: BHLL
- cik: 0001407583
- company_name: Bunker Hill Mining Corp.
- filed_at: 2022-10-21T23:59:59+00:00
- event_type: other_material
- sentiment: positive
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1407583/000149315222029352/0001493152-22-029352-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1407583/000149315222029352/form8-k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001493152-22-029352
- JSON: https://secwatch.observer/filing/0001493152-22-029352.json
- Plain text: https://secwatch.observer/filing/0001493152-22-029352.txt

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