Project Background
Along an 11-mile stretch of the Arkansas River, almost 7 acres of fluvial tailings—contaminated deposits from historic mining operations in the Leadville Mining District—pose significant environmental and public health risks. These white, crystalline deposits are barren of vegetation and contain high levels of harmful metals. The exposed tailings are prone to erosion, which threatens to spread contaminants into shallow surface and groundwater, as well as the surrounding ecosystem. The impacted area is also a popular recreational spot, doubling as a winter elk sanctuary and a high-traffic location for anglers, further increasing the urgency for remediation.
Approach
Building on the success of previous remediation efforts, Trout Unlimited (TU), ARWC, and additional project partners will use in-situ phytostabilization techniques to remediate the contaminated soils. This method has proven effective in similar projects across the state, restoring over 100 acres of fluvial tailings at other abandoned mine land (AML) sites. The goal is to rehabilitate 6.9 acres of riparian habitat by stabilizing soils and establishing native vegetation. This will reduce runoff, prevent stormwater contamination, and control sediment yields from un-vegetated areas. The project will protect the Arkansas River’s water quality, improve shallow groundwater, and enhance the experience for anglers and other recreational users by reducing potential exposure to contaminants.
Expected Outcome
This project will transform the affected area into a healthy riparian habitat, reducing non-point source pollution and improving water quality in the Arkansas River. The restoration of vegetation will stabilize the soil, curbing erosion and sedimentation that have long plagued the region. Additionally, the project will enhance public access and safety, making the area more enjoyable for fishing and other recreational activities.
Fluvial tailings on the soil surface (photo credit Trout Unlimited).