Mad Creek Sub-basin Fish Passage Improvement Projects

The Mad Creek drainage is 1 of 4 sub-basins in the Mid­dle Reach North San­tiam (i.e. the area just down­stream of Detroit and Big Cliff Dams down to Lyons) that pro­vides spawn­ing and rear­ing habi­tat for ESA listed threat­ened pop­u­la­tions of Upper Willamette River (UWR) Chi­nook salmon and (UWR) Win­ter Steel­head. The Mad Creek sub-basin, located near the City of Gates, con­sists of two peren­nial streams orig­i­nat­ing in forested uplands: Mad Creek & Lit­tle Rock Creek.

2013 Mad Creek/Gates Bridge East Project

To mit­i­gate the impacts of the I-5 Santiam-Kuebler Ore­gon Depart­ment of Trans­porta­tion (ODOT) project, National Marine Fish­eries Ser­vice (NMFS) issued a bio­log­i­cal opin­ion (BO) requir­ing ODOT to improve exist­ing fish pas­sage con­di­tions on Mill Creek near the Kue­bler project site. After dis­cus­sions between ODOT and NMFS, NMFS issued a let­ter with a follow-up email with the con­clu­sion that the mit­i­ga­tion mea­sures ini­tially set forth in the BO for the ODOT Project would be bet­ter reme­died in the form of off-site fish pas­sage restora­tion and habi­tat enhance­ment as agreed among ODOT, NMFS and the North San­tiam Water­shed Coun­cil (NSWC) in order to meet the terms and con­di­tions of the ini­tial BO. As part of the mit­i­ga­tion ODOT retained the ser­vices of Linn County to replace the par­tial fish bar­rier (under­sized cul­vert) on Mad Creek near the con­flu­ence of the North San­tiam River with a fish pass­able bridge cross­ing. In Octo­ber of 2013 Linn County com­pleted this project.

Mad Creek Bridge 9-27-13 (2)


2001 Mad Creek Stream Cross­ing Improve­ment Project. 

The North San­tiam Water­shed Coun­cil in part­ner with the Linn County Pub­lic Works received an Ore­gon Water­shed Enhance­ment Board (OWEB) grant in 2001 titled the Mad Creek Stream Cross­ing Improve­ment Project. This project was located upstream of where the recently com­pleted 2013 bridge project is located.  This Mad Creek stream cross­ing had been iden­ti­fied by the Ore­gon Depart­ment of Fish and Wildlife (ODFW) as an imped­i­ment to fish pas­sage. Both juve­nile and adult win­ter steel­head had been impacted by the bar­rier and ODFW had listed the site as high pri­or­ity in the ODFW Cul­vert Inven­tory of 1997. The OWEB funds awarded were used to replace two under­sized cul­verts with a bridge  which opened up prime spawn­ing and rear­ing habi­tat for ESA listed Chi­nook salmon and win­ter steel­head. This project was com­pleted in Octo­ber of 2002.