Proposal to Establish Intensively Monitored Watersheds for ...

TECHNICAL REVIEW DRAFT SRFB IMW-1degrading habitat through riparian vegetation removal, stormwater runoff, fish passage barriers,and high sediment loads (W Kitsap WSA 1998; Seiler et al. 2002)Germany/Mill/Abernathy ComplexThe GMA monitoring complex is located on the Lower Columbia River downstream of Longview,Washington. Watershed areas above the smolt trap are similar (Table 3) ranging from 14,400 to18,700 acres. Abernathy and Germany Creeks drain steep basins with headwater elevations ofup to 806-m. Mill Creek is a lower elevation basin with headwater elevations of 555-m. Landcover is largely forested with land use in all three basins focused on timber production.Abernathy and Germany Creeks are primarily comprised of private timberlands, whereas DNRowns a large share of the Mill Creek watershed. Residential and agricultural development islight and concentrated in the lower portion of all three basins. Juvenile chinook, and cohosalmon and cutthroat and steelhead trout are have trapped since 2001 but adult escapement isnot monitored.# Smolt TrapGermany CrAbernathy CrMill Cr###NColumbia R1 0 1 2 MilesFigure 3. Location of traps on Germany, Mill, and Abernathy creeks provide very goodestimates for chinook, coho, cutthroat, and steelhead.10