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Technical Study

First Mining files NI 43-101 PFS report for Springpole

Billion-Dollar CapEx Hurdle Casts Shadow Over Robust Springpole Economics

By The Northwire Desk — AI Analysis Dec 23, 2025 · 12:50 FF · 0.54 First Mining Gold Corp.
Executive Summary

On December 23, 2025, First Mining Gold Corp. filed its independent NI 43-101 Pre-Feasibility Study (PFS) technical report for the 100%-owned Springpole Gold Project in Ontario. This filing follows the summary announcement made on November 18, 2025. The 2025 PFS outlines a 30,000 tonne-per-day open pit operation with a 9.4-year mine life. Key economic metrics at a base case gold price of $3,100/oz USD include an after-tax NPV (5%) of $2.1 billion USD and an after-tax IRR of 41%. The study projects an average annual payable gold production of 330,000 oz for the first five years at a Life of Mine (LOM) All-In Sustaining Cost (AISC) of $938/oz USD.

Material Impact

The filing is a routine regulatory requirement that confirms the robust economics previously signaled to the market. However, a critical analysis reveals several material points: - Project Scale vs. Financial Capacity: The initial capital cost of $1.104 billion USD is nearly double the company's current market capitalization and over 40 times its current cash position. - Leverage to Gold Price: The project is highly sensitive to gold prices; an increase to $4,200/oz Au pushes the after-tax NPV to $3.8 billion USD. - Operating Efficiency: The AISC of $938/oz is competitive, but the initial capital intensity is high ($1.1B for a 9.4-year life). - First Majestic Stream: Investors must account for the existing silver purchase agreement where First Majestic Silver Corp. owns 50% of the payable silver produced for the life of the project.

FF · Price
Company Overview

First Mining Gold Corp. is a Canadian developer with two primary assets. - Springpole Gold Project (Ontario): One of the largest undeveloped open-pit gold deposits in Canada. It holds 3.8 million ounces of gold in Probable Reserves. The project is currently in the Feasibility and Permitting stage. - Duparquet Gold Project (Quebec): A multi-million ounce deposit located in the Abitibi region. 2025 exploration has significantly expanded the known mineralization zones (Miroir, Aiguille).

Read the original news release →

More from First Mining Gold Corp.

Jun 30, 2026 · 17:05

First Mining Gold secured federal environmental assessment approval for its Springpole project, clearing the path to construction.

Regulatory Jun 30, 2026 · 16:46

First Mining and Slate Falls Nation Agree to Key Terms of Project Agreement for Springpole Gold Project

M&A / Property Jun 16, 2026 · 07:30

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Other Jun 16, 2026 · 07:30

First Mining secured First Nations support for its Springpole project, clearing a key hurdle toward developing Canada’s next major gold mine.

Regulatory May 21, 2026 · 07:00

Drilling Execution Continues Amidst Permitting Delays and Portfolio Restructuring

Drill Results May 19, 2026 · 07:00

Duparquet Drilling Confirms Resource Growth, But Springpole Capital Gap Remains Critical Risk

Drill Results