South Park HMA and the City of Jackson Water Treatment facilities are located approximately 8 miles south of the town of Jackson, Wyoming. The highest concentration of waterfowl and shorebirds in the Jackson area occur at this site. The state portion of the area was acquired with federal aid funds to provide an elk feed ground for approximately 1,000 elk, 4 months of the year. Additionally, the area is managed to provide hunting, fishing, wildlife viewing, and provide waterfowl production. The area is located along the Snake River drainage and is an excellent waterfowl production area as well as migration staging area. In addition, Trumpeter Swans overwinter in the area, with as many as 10 to 100 swans recorded using the ponds during winter. Three migration ponds were constructed on the WGFD's South Park unit as migration for the expansion of the town's wastewater treatment facility. Additional wetland ponds were constructed as mitigation for the Jackson Lake Dam construction project.

Ornithological Summary

The area is critical wintering grounds for Trumpeter Swans, nesting Bald Eagles and ospreys, and holds large concentrations of waterfowl over the course of the year especially in winter and during migration. Barrow's Goldeneye over winter on the area with as many as 200-500 birds seen from November until March.

Conservation Issues

Habitat management is needed to maintain integrity. Weed control: WGFD has contracted with Teton County Weed and Pest to control weeds in the area. This program needs to be continued and perhaps expanded. Water quality of the wetland ponds during the late summer period: Water passes into the ponds from the Treatment Plant adjacent to the unit before flowing into the Snake River. During summer, flows are lower and algae accumulate on the pond surfaces. Condition of nesting islands: Islands were constructed in the wetlands ponds for nesting and loafing habitat for waterfowl. Exotic vegetation and weeds have become established on the islands. Cottonwood Regeneration: The cottonwood gallery forest needs to be monitored to make sure that adequate numbers of young trees are established over time to keep the forest viable. Dike construction along the Snake River and grazing pressure from elk both may contribute to lack of seedling establishment.


City, State, and Federal (BLM). All these areas are managed by the state.


The major habitat types that make up the area includes: lowland riparian, open water, and mature cottonwood gallery. South Park WHMA IBA includes Flat Creek, which runs through the area, 3 mitigation ponds (Snowy Egret Pond=16.8 acres, Sandhill Crane Pond=11.5 acres, and Great Blue Heron Pond=8.3 acres). South Park wetlands were created as mitigation for the expansion of the town's wastewater treatment facility. The main goal of the creation of the wetland area was aimed at enhancing: nesting success, juvenile survival, foraging sites, staging areas and wintering habitat for waterfowl. Natural wetland areas also occur along Flat Creek, the Snake River boarders the area's southern edge.

Land Use

The primary land uses are nature and wildlife conservation, and hunting/fishing. The area is closed to the public from December 1- May 1.

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