Idaho-Maryland Mine Project
The Idaho-Maryland mine was once the second largest lode gold mine by annual production in the United States with total past production of 2.4 million oz of gold at an average mill head grade of 1/2 oz per ton.
Rise Gold Corp. has applied for a Use Permit to re-open the Idaho-Maryland mine.
The state-of-the-art underground mine and surface processing facilities have been meticulously designed to ensure minimal environmental impacts and disturbance to neighbors. The project enjoys strong local support and the majority of Nevada County support the re-opening of the mine.
Satisfying • Safe • Well-Paid Careers
600+ Local Jobs created
312 Employees at commercial production
Extensive training programs
$94,000 Avg. annual wages - 2x the average local wages
$122,000 Average annual earnings – including robust benefit packages
In November 2019, Rise submitted an application for a Use Permit to Nevada County to allow the reopening of the Idaho-Maryland Mine. Nevada County’s independent Draft Environmental Impact report is expected to be released soon and is a major milestone in the permitting process.
- Once the 2nd largest gold mine in the US
- Historic production of 2.4 million oz gold 0.5oz per ton mill head grade
- ~121,000 oz / year in 1940-41
- Forced closure in WWII
- Closed in 1956 due to fixed price of gold
- Private land
- No royalties
Exploration Drill Results
- Numerous mineralized intercepts up to 1 km below historic mine.
- Drill hole I-18-10 assayed
149.3 gpt / 6.81 m (4.35 oz per ton / 22.4ft), included 2190.0 gpt / 0.46 m (63.85 oz per ton / 1.5 ft) - True width unknown.
Green Gold and Green Economy
- 50% less CO2 per $1M GDP than California Average
Compared to world gold industry – per oz
- 90% less CO2
- 90% less water consumed
- 95% less “mine waste” produced
- 99% less NOx and SOx emissions
The Company believes it drilling program has been successful but cautions investors no current mineral resources or mineral reserves have been defined. The Company’s submission of an application for a Use Permit from Nevada County requires information regarding planned throughput and material quantities. The Company cautions investors that no technical report has been filed to support that this rate of production can be achieved. The Company has not completed a feasibility study to establish mineral reserves and therefore has not demonstrated economic viability of the IM Mine. The Company has not made a production decision for the IM Mine.
Ben Mossman, P.Eng is the qualified person responsible for this website.
Rise owns the past producing Idaho-Maryland Gold Mine located in Nevada County, California USA. Total past production from the Idaho-Maryland Mine is 2,414,000 oz gold with an average mill head grade of 0.50 oz/ton (~17 gpt)
Discovered during the gold rush, the Idaho #1 Vein produced a remarkable 935,000 oz of gold at an average head grade of 1.1 oz per ton and by 1892 the mine was believed to be the deepest gold mine in the world and the greatest gold producer on the continent.
New discoveries in the early 20th century allowed a second era of prosperity at the mine and by 1939 the Idaho-Maryland was the largest producing lode gold mine in the California and 2nd in the United States only to the mighty Homestake Mine. In the two years before forced closure, in 1940 and 1941, mine production averaged 920 tons per day with a mill head grade of 0.38 oz per ton (12.9 gpt) and 121,000 oz of gold production per year.