Dieckman Slough Restoration: Lower North Santiam Subbasin


Dieckman Crk Upstream - Invasives

Dieck­man Slough is a side chan­nel of the Lower North San­tiam River, just  down­stream of the City of Stay­ton, in Mar­ion County, flow­ing through flood­plain f  forests and com­mer­cial agri­cul­tural fields near Stayton-Jefferson Rd. This project  builds on sig­nif­i­cant exist­ing restora­tion in the area, includ­ing NRCS Wet­lands  Reserve Pro­gram ease­ments on a total of 331 acres, and the Hatch side-channel  fish pas­sage, instream, and flood­plain restora­tion (all just down­stream), as well as  the adja­cent, recently purc­ahsed Cha­hal­pam Wildlife area, a 338 acre  con­ser­va­tion ease­ment held by the Grand Ronde Tribe.

In its lower sec­tion, Dieck­man Slough is lack­ing instream habi­tat com­plex­ity and areas of flood­plain forests have been con­verted for com­mer­cial agri­cul­ture.  Many res­i­dent and migra­tory fish species (includ­ing Threat­ened Upper Willamette River spring Chi­nook, win­ter steel­head and Pacific lam­prey) uti­tl­ize Dieck­man Slough for spawn­ing and rear­ing.  Good qual­ity off-channel habi­tat is a high pri­or­ity restora­tion need in the North San­tiam River, as expressed in the draft Willamette/Lower Colum­bia ESA Salmon and Steel­head Recov­ery Plan and other plan­ning doc­u­ments.  OWEB grant funds and Farm Ser­vice Agency Con­ser­va­tion Reserve Enhance­ment funds were  used to restore 24 acres of  riparian/floodplain habitat.

Project Restora­tion began in the sum­mer of 2015

Win­ter of 2016:  49,187 native trees and shrubs were planted

Win­ter of 2017:  19,325 native trees and shrubs were interplanted

Win­ter of 2018: 2050 native trees and shrubs were interplanted

 The site expe­ri­enced beaver activ­ity in both 2017 and 2018. As a result the NSWC installed caged wil­lows and sev­eral beaver feed­ing sta­tions close to the water to help keep the beaver away from the young plantings.

The NSWC will con­tinue to assist the landowner with spring and fall plant estab­lish­ment activ­i­ties until the plant­i­ngs are “free-to-grow.”