Nearest Town: Hoover. Butte Count\, SD 



Ecoregion: Northwestern Great Plains (Typical) 



Aquatic Ecological System Type: C005-Northwestem Great Plains Perennial Stream 



Key Environmental Factors: Hydrology — upstream dams or diversions in the watershed; Grazing — 

 slight impacts 



Rare or I nique Species: No rare species or communities documented 



Rare Features: No rare features documented 



Introduced/Exotic Species: Black bullhead, golden shiner and green sunfish (all rare) 



Overall Ecological Site Condition: Good 



Reach Summary: The 300 m reach consisted of 2 riffle/run/pool complexes (full flowing connectivity) 

 w ith the lowermost pool being -^ 1 00m long. ~40cm deep and containing the most tlsh holding habitat. This 

 stream reach has moderate quality habitat and a fair diversity of microhabitats. thus leading to high tlsh 

 species diversity ( 1 1 species. 8 native). All substrate of the top riflfle/run was gravel dominated with some 

 silt and cobbles and pools I and 2 with surrounding vegetation dominated by Scirpus sp. (rushes) and 

 Eleocharis palustris. common spikerush (Figure 31 ). Aquatic geomorpiiic features and overhanging 

 banks provided the most significant stream habitat in this stream reach. Vegetation coverage along the 

 riparian stream channel was largely intact and dominated by grasses. Livestock use index (LUI) was low 

 with -10 cow pies counted on a 75m walk of the left & right banks. Pugging and hummocking was 

 minimal. 



Reach Riparian Rankin};: BLM= 95% (23 of 24) EPA RBP= 89% (178 of 200) 



Reach Riparian Geomorphology: Ihe geomorphology of this stream reach is a Rosgen C-4 uilii a 

 gentle-medium slope (~1 %). moderate sinuosity, a riffle/run/pool configuration with substrate dominated 

 by gravels & cobbles and ranging to gravel to silt-dominated pools. Pools are slightly incised and averaged 

 >40 cm in depth, wetted width of the reach was 4.4m. Surrounding bank materials are tlner than the 

 channel bed materials and the bluff bank upstream (Figure 32) probably contributes sediments in high 

 flow events. 



Amphibian Community: I adult Northern leopard Frog(NLF) observed in the uppermost pool. 



Fish Community: 1 1 fish species (8 native) were seined in the 2 riffle/run/pools. Dominant species 

 were the plains minnows, sand shiners and llathead chubs, which are the expected llsh for this stream 

 type. Although a few introduced species were present (black bullhead, golden shiners and green sunllsh), 

 they were not abundant and did not have a large detrimental elTect on the 1131, which was an excellent 

 score. 



Fish Community (Quality: IBI= 90.3 0/E= 8/7.5 or 103% ol the expected fish community. 



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