. Aquatic surveys and assessment of the Slim Buttes region of Harding and Butte Co., SD . Figure 51. Hay Creek (AES D005) a tributary to South Figure 52. Hay Creek (AES DO 05) aquatic water- Fork Moreau River looking upstream plantain (Alisma triviale) Location: Accessed from County Rd. 2 miles west of Rt. 85 at bridge crossing and proceeded upstream -25m to the first pool designated the bottom of the reach. Nearest Town: Redig, Butte County, SD Ecoregion: Typical Northern Great Plains Steppe Aquatic Ecological System Type: D005-Northwestern Great Plains Intermittent Stream Key Environmental
. Aquatic surveys and assessment of the Slim Buttes region of Harding and Butte Co., SD . Figure 51. Hay Creek (AES D005) a tributary to South Figure 52. Hay Creek (AES DO 05) aquatic water- Fork Moreau River looking upstream plantain (Alisma triviale) Location: Accessed from County Rd. 2 miles west of Rt. 85 at bridge crossing and proceeded upstream -25m to the first pool designated the bottom of the reach. Nearest Town: Redig, Butte County, SD Ecoregion: Typical Northern Great Plains Steppe Aquatic Ecological System Type: D005-Northwestern Great Plains Intermittent Stream Key Environmental Factors: Hydrology—upstream dams or diversions in the watershed; Grazing— moderate impacts Rare or Unique Species: Aquatic water-plantain, Alisma triviale (Figure 52). Rare Features: No rare features documented Introduced/Exotic Species: None Overall Ecological Site Condition: Fair Reach Summary: The 100 m reach consisted of 1 run/pool complex with the lower pool being -80m long and produced by an earthen uprising near the road culvert. This contained the deepest fish holding habitat. This stream reach has sparse aquatic habitat and low species diversity (1 fish species, low numbers). Only 8 fathead minnows were captured after multiple seine hauls. All substrate of the pools was silt dominated with abundant growth of the water-plantain, Alisma gramineum (Figure 52). This was the only site of all site visits that contained this wetland obligate plant. The riparian vegetation was dominated by Scirpus sp. (rushes) and Eleocharis palustris, common spikerush. Aquatic vegetation and overhanging banks provided the most significant stream habitat in this stream reach. Livestock use index (LUI) was moderate with -15 cow pies counted on a 50 m walk of the left & right banks. Pugging and 51
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