Rapid Bio-Assessment Report North Clackamas Watersheds SUBMITTED TO North Clackamas Watersheds Council MAY 2020 PGE Salmon FUNDED BY Habitat Support Fund Rapid Bio-Assessment Report North Clackamas Watersheds SUBMITTED TO North Clackamas Watersheds Council 2416 SE Lake Rd. Milwaukie, Oregon 97222 PREPARED BY Inter-Fluve, Inc. 501 Portway Ave., Suite 101 Hood River, OR 97031 MAY 2020 NORTH CLACKAMAS WATERSHED RAPID BIO-ASSESSMENT TABLE OF CONTENTS 1. Executive Summary ...................................................................................................................... 9 2. Introduction & Background ........................................................................................................ 12 Land Use History ......................................................................................................................... 13 Salmonid Use and Status ............................................................................................................ 14 2.2.1 Lower Columbia River Coho Salmon ................................................................................... 15 2.2.2 Lower Columbia River Steelhead Trout ............................................................................... 16 2.2.3 Upper Willamette River Spring Chinook Salmon ................................................................. 16 2.2.4 Lower Columbia River Fall Chinook Salmon ........................................................................ 18 2.2.5 Other Species ....................................................................................................................... 18 2.2.6 Limiting Factors ................................................................................................................... 19 Previous Assessments ................................................................................................................. 22 3. Rapid Bio-Assessment Methods ................................................................................................. 23 Framework .................................................................................................................................. 23 3.1.1 Assessment Methodology Overview ................................................................................... 23 3.1.2 Modifications to AIP for the Rapid Bio-Assessment ............................................................ 24 3.1.3 ODFW Benchmarks ............................................................................................................. 25 4. Rapid Bio-Assessment Results .................................................................................................... 28 Kellogg Creek Reach 1 ................................................................................................................. 28 4.1.1 Overall Reach Conditions .................................................................................................... 28 4.1.2 Habitat Unit Composition ................................................................................................... 30 4.1.3 Channel Infrastructure and Road Crossings ........................................................................ 36 4.1.4 Summary ............................................................................................................................. 39 Mt. Scott Creek – Reach 3 ........................................................................................................... 41 4.2.1 Overall Reach Conditions .................................................................................................... 41 4.2.2 Habitat Unit Composition ................................................................................................... 43 4.2.3 Channel Infrastructure and Road Crossings ........................................................................ 48 4.2.4 Summary ............................................................................................................................. 50 Mt. Scott Creek – Reach 5 ........................................................................................................... 52 4.3.1 Overall Reach Conditions .................................................................................................... 52 4.3.2 Habitat Unit Composition ................................................................................................... 54 4.3.3 Channel Infrastructure and Road Crossings ........................................................................ 60 4.3.4 Summary ............................................................................................................................. 64 Boardman Creek – Reach 1 ......................................................................................................... 66 4.4.1 Overall Reach Conditions .................................................................................................... 66 4.4.2 Habitat Unit Composition ................................................................................................... 68 4.4.3 Channel Infrastructure and Road Crossings ........................................................................ 74 4.4.4 Summary ............................................................................................................................. 76 Rinearson Creek – Reaches 1 & 2 ............................................................................................... 78 MAY 2020 1 NORTH CLACKAMAS WATERSHED RAPID BIO-ASSESSMENT 4.5.1 Overall Reach Conditions .................................................................................................... 78 4.5.2 Habitat Unit Composition ................................................................................................... 80 4.5.3 Channel Infrastructure and Road Crossings ........................................................................ 86 4.5.4 Summary ............................................................................................................................. 87 River Forest Creek – Reach 1 ...................................................................................................... 89 4.6.1 Reach conditions ................................................................................................................. 89 4.6.2 Channel Infrastructure and Road Crossings ........................................................................ 94 4.6.3 Summary ............................................................................................................................. 94 Additional Reaches not Surveyed ............................................................................................... 94 4.7.1 Upper Kellogg Creek ............................................................................................................ 94 4.7.2 Upper Mt. Scott Creek ......................................................................................................... 95 5. Conclusions ................................................................................................................................ 98 6. Restoration Strategy .................................................................................................................. 99 Overview ..................................................................................................................................... 99 Restoration elements ................................................................................................................ 100 6.2.1 Protection .......................................................................................................................... 100 6.2.2 Reconnect and Restore ...................................................................................................... 101 6.2.3 Enhance and Create .......................................................................................................... 101 Strategy Constraints .................................................................................................................. 102 7. The Restoration-Actions Toolbox .............................................................................................. 103 Riparian Management .............................................................................................................. 104 Floodplain & Wetland Enhancement ........................................................................................ 104 Off-Channel Habitat .................................................................................................................. 105 Large Wood ............................................................................................................................... 105 Bank Treatments ....................................................................................................................... 106 Channel re-alignment ............................................................................................................... 106 Fish passage improvements ...................................................................................................... 107 8. Potential Project Identification ................................................................................................. 108 Kellogg Creek ............................................................................................................................. 109 Mt Scott Creek .........................................................................................................................