For more information on species & ecosystem science:

Wildlife Science

Fish Science

Habitat Science


Intensively Monitored Watersheds

Lower Columbia Complex

Land use in the Lower Columbia complex (Germany, Mill, and Abernathy) is primarily commercial forestry. These watersheds provide the best opportunity to assess the effectiveness of restoration treatments and commercial forest management on increasing salmon production. Lack of large wood in the channels, reduction in off-channel habitat and alterations in sediment delivery and transport are factors likely influencing salmon production in these watersheds.

Chinook, coho, and steelhead are the focal species for population abundance and survival study in these watersheds. AAbundance of coho is estimated at three life stages life stages (parr, smolt, spawner). Abundance of Chinook and steelhead are estimated at two life stages (smolt, spawner). Coho parr are collected by electrofishing and seining in index reaches during late summer. Juvenile migrants of all species are captured in screw traps operated near the mouth of the creek during the outmigration period. Adult escapement is estimated using combinations of a resistance-board weir on Abernathy Creek and spawner surveys on all three creeks.

WDFW Staff

  • Pat Hanratty
  • Ned Pittman

Select a watershed from the map below:

Mill Creek Watershed Abernathy Creek Watershed Germany Creek Watershed


Lead Scientists:
Kirk Krueger (Habitat)
Mara Zimmerman (Fish)

Ecoregions: Northwest Coast

Ecological Systems: North Pacific Maritime Mesic-Wet Douglas-fir-Western Hemlock Forest, North Pacific Maritime Dry-Mesic Douglas-fir-Western Hemlock Forest, North Pacific Lowland Riparian Forest and Shrubland

Stream Habitat Information
Substrate Distribution
Habitat Types
Large Woody Debris
2005 Field Season