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Investigative Methods for Controlling Groundwater Flow to Underground Mine Workings

Appendix A—Elkhorn Mine Riparian and Wetlands Characterization and Mapping

Methods

The office procedures, field investigations, and mapping results are discussed on pages 17 and 18. Figure 1 shows the points where data were collected for the wetland and riparian characterization and mapping.

A topographic map of the Elkhorn Mine area with stop points.
Figure 1—Stop points (data collection sites) for the wetland and riparian characterization and mapping in the Elkhorn Mine area.

Brief descriptions of the major ecological units follow.

The large grassy parks to the southwest, west, and northwest of the mine surface workings reflect a combination of clay soils and seasonally to yearlong saturation of the upper soil profile. Within the parks closest to the mine sites, the wettest areas occupy the lowest parts of the valley bottoms along small intermittent and perennial streams (figure 2).

An image of a meadow.
Figure 2—Map unit 1H: A wet meadow ponded at the surface. Beaked sedge and water sedge dominate the plant community. Soils have an 8-inch-thick fibric organic surface layer.
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