Sherman Mine and Channel Construction Project

Aug 26, 2024 | Active Projects

Project Background
The Sherman Mine, also known as Day Mines, is situated in the upper Iowa Gulch at the base of Mt. Sherman, approximately 8 miles northwest of Leadville. The mine operated from 1968 to 1982, primarily producing silver, lead, and zinc. In 2008, the Colorado Division of Reclamation, Mining, and Safety (DRMS) completed reclamation efforts to reestablish the natural drainage route through Iowa Gulch and stabilize the waste rock pile. However, lateral erosion from runoff and storm events has since destabilized and widened the channel, causing the transport of waste rock and degradation of sensitive wetland areas downstream. This project aims to construct grouted riprap channels to stabilize the waste rock and prevent further sedimentation, thereby protecting the wetland ecosystem below the mine.

Approach
The project will address approximately 2,000 feet of drainage channel, divided into the North Channel, South Channel, and Energy Dissipation zones. The channels will be stabilized using a combination of grouted riprap and boulders, providing a long-term solution to the excessive erosion and material mobilization that threaten the wetland. This stabilization effort is particularly critical given a 2008 blowout at the mine portal, which sent 8,000 to 10,000 cubic yards of material downstream. The project will be conducted entirely on Bureau of Land Management (BLM) lands, with the added benefit of restoring approximately 2 acres of wetland habitat. The improved habitat will support native greenback trout and enhance recreational fishing opportunities on public lands.

Expected Outcome
The Sherman Mine Channel Construction Project aims to significantly reduce sediment loads entering the downstream wetland, leading to improved habitat for native fish species such as the greenback trout. In addition to habitat restoration, the project will enhance public access to recreational fishing opportunities on BLM lands, contributing to both environmental and community benefits.

 

Trout Unlimited ‘s Sherman Mine Restoration Site

The Arkansas River Basin Roundtable invites you to a special seminar on Tuesday, February 18th, at Otero College in La Junta, CO, focused on the critical issue of Arkansas River channel morphology and its changes over time. This event, running from 9:30 AM to 1:30 PM, will feature expert insights into the river’s dynamic landscape, its historical shifts, and ongoing efforts to improve and manage its channel.

Event Highlights:

  • Keynote Speaker: Mr. Bill Tyner, PE, will lead the seminar, offering a comprehensive look at Arkansas River channel morphology, from past changes to present-day challenges.
  • Expert Presentations: Learn from representatives from USGS, CWCB, LAVWCD, and more. Each will provide valuable information on their role in monitoring, managing, and improving the river’s health and function.
  • Audience Q&A: Attendees will have the opportunity to engage directly with speakers during the Q&A session, fostering discussion and sharing of ideas.
  • Collaborative Paths Forward: This seminar will also explore potential collaborative strategies to improve the river’s channel, with input from experts and stakeholders.
  • Lunch and Refreshments Provided: Enjoy a provided lunch while networking with other attendees and discussing the seminar topics.

This is a fantastic opportunity for anyone interested in river management, restoration, and collaboration. Whether you are involved in water resources, environmental science, or community planning, this seminar will offer important insights and actionable knowledge.

RSVP Details:

Date: Tuesday, February 18th
Time: 9:30 AM – 1:30 PM (Presentations begin at 10 AM)
Location: Otero College, La Junta, CO
RSVP by February 4th: Please RSVP to Katie Garrett at [email protected].

Don’t miss out on this opportunity to engage with experts and fellow stakeholders as we work together to shape the future of the Arkansas River’s channel!