2012-01-06_PERMIT FILE - C1982057A ‎(2)‎

• Permit No: C1982057A
• IBM Index Class Name: Permit File
• Doc Date: 1/6/2012
• Section_Exhibit Name: TAB 11 WILDLIFE
• Media Type: D
• Archive: Yes

• Pool bottom fauna collected from lower Dry Creek (Site D-3) in May was not very abundant
and was dominated by ba etid mayflies with lesser catches of limnephilid caddi sflies,
si mulids, and tipulids (Table 11-33). Later, in November, pool bottom fauna from lower
Dry Creek was scarce (Table 11-34), however a second sample collected from a riffle
area revealed considerably greater numbers and diversity of benthic fauna (Table
11-35 ). The riffle sample was strongly dominated (68.4 percent) by caddi sflies, most of
the genus Hydropsyche.
Blackfly larvae dominated the benthic fauna found in upper Sage Creek (Site 5-1) in May
(Table 11-36). Baetid mayflies were second in dominance while stoneflies were third in
order of abundance. In May, upper Sage Creek flow was rapid and the water was clear and
well oxygenated. The substrate in upper Sage Creek is coarse gravel and rubble which
provides nearly ideal habitat for stonefly niads and blackfly larvae.
Worms of the family Lumb ri culidae dominated the benthic fauna at Sage Creek below Sage
Creek Reservoir (Site S-2, Table 11-37). Blackfly and midge larvae were next in abundance
and Baetid mayflies were present in si gnf icant numbers. The banks at this station are
• lined with dense willow trees and the substrate is mostly fine gravel, The predominance
of Lumb ricul id worms at this station is not readily explainable except that such worms are
common inhabitants of stony streams and their abundance can fluctuate rather unexpectedly
(Hynes, 1970).
Baetid mayflies were generally abundant and dominated the benthic fauna in lower Sage
Creek (Site S-3) in both May and November. Several species of stoneflies were also
abundant, especially in November (Tables 11-38, 11-39, and 11-40). Numerous caddisflies
of the genus Hydropsyche were collected from riffle habitat during the November sample
collection.
More stoneflies were collected at the Sage Creek stations than at the Dry Creek stations.
The dominant species of Isoperla Patricia, Capnia sp., and Nemoura sp., like most
stoneflies, require clean, cool, highly oxygenated water and prefer stony substrates.
Stonier substrate and lower levels of total dissolved solids in Sage Creek than in Dry
Creek probably provide a more suitable habitat for these benthic animals.
• Periphyton and Benthos - Ponds. Fewer organisms were collected from the "mud slide" lake
(Site P-1) than from the upper beaver pond (Site P-2) as indicated in Tables 11-41 and
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