The summary:
Metallic Minerals Corp, a Canadian prospecting company, with investment from Newmont Corp has been drilling exploratory core holes near Bedrock Creek in La Plata Canyon on the patented mining claim known as the Allard mine. They plan to drill more core holes in 2025 at Copper Hill on the other side of the Bedrock drainage. They have identified 16 other sites to investigate according to investor presentations. Recent news articles downplay the findings and development timeline. The company press releases are very optimistic about ore quality and ore body size. Outreach and information provided to the public and local residents has been minimal. The prospecting permit requirements do not take into account the much greater impacts to the area and environment that would occur if the activity progresses to mining and the permitting process has gone largely under the radar of the public. The impacts on the La Plata Canyons' river habitat, downstream water quality and other public uses are potentially very significant, particularly if the activities progress to industrial scale mining. Porphyry Copper deposits are typically mined with an open pit but Metallic Minerals suggests that it would be mined with an underground technique called block caving which is highly automated and would be destructive to the area above the mine.
In the News:
https://www.durangoherald.com/articles/exploratory-drilling-to-continue-in-la-plata-canyon/
https://www.durangotelegraph.com/news/top-stories/not-ready-to-break-ground/
https://www.durangoherald.com/articles/what-people-in-mancos-think-about-mining-in-the-la-platas/
https://www.ksut.org/environment-climate/2024-10-29/is-mining-coming-to-the-la-plata-mountains
What Metallic Minerals has to say:
https://mmgsilver.com/projects/laplata/technical-report/
https://mmgsilver.com/projects/laplata/property-overview/
A presentation to investors about how promising the La Plata exploration appears to the developer:
The exploration is being invested in by one of the worlds largest gold mining companies
Permits associated with the mining exploration pertaining to water use and beyond:
Links to informational stuff on the proposed mining method of block caving:
https://bdtbt.esdm.go.id/wp-content/uploads/2020/10/Underground-Freeport-Indonesia.pdf
https://www.youtube.com/watch?v=MWqMD85MVO4
https://www.e-education.psu.edu/geog000/node/911
https://www.northparkes.com/about/our-operations
https://kincoracopper.com/northparkes-project/