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View Fact Sheet

Riverbend Side Channel Enhancement

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Proposal
Planning/Design
Implementation
Post-Implementation
Completed

Contents

Project Overview

Basics

Degraded Channel and Riparian Areas
Isolated Side Channels and Off-Channel Habitats
Riverbend Side Channel Enhancement

Implementation
The Sieben Creek side channel reconnection project is on private property upstream of Sah-Hah-Lee Golf Course and downstream of the Rock Creek Confluence on the right bank of the Clackamas River. The project focuses on increasing channel complexity and connectivity which is currently inaccessible following the 1996 flood event. Constructing an apex jam will rack material and scour an upstream pool. Habitat structures throughout the channel would add structure, provide cover and initiate scour pools. Alcove enhancements at the downstream end of the project will include habitat structures to provide additional complexity.

2020
2022
2025
9/27/2022

Location

To zoom, hold down Shift and drag a rectangle.
Right bank above Sah-Hah-Lee Golf Course

  • Rock Creek-Clackamas River
On lower Mainstem Clackamas River

Organizations

Funders
  • Metro Nature in Neighborhoods
  • Oregon Watershed Enhancement Board
Lead Implementer
  • Clackamas River Basin Council
Other Partners BLM

Contacts

Isaac Sanders (isaac@clackamasriver.org)

Performance Measures

Expected Performance Measures

Large Wood Placement Placement Density: 15 - 25 yrd^3/1000 ft Placement Location: In Channel 1,750 lf
Riparian / Floodplain Invasive Species Removal Area Side of stream / river: Both sides of stream 4 acres
Riparian / Floodplain Native Planting Area Side of stream / river: Two sides 4 acres
Side Channel Habitat Increase Inundation frequency: Equal or more frequent than annual 1,750 lf

Reported Performance Measures

Large Wood Placement
Placement Density Placement Location 2022 Units
15 - 25 yrd^3/1000 ft In Channel 1,750 lf
Total 1,750 lf

Riparian / Floodplain Invasive Species Removal Area
Side of stream / river 2022 Units
Both sides of stream 4 acres
Total 4 acres

Riparian / Floodplain Native Planting Area
Side of stream / river 2022 Units
Two sides 0 acres
Total 0 acres

Side Channel Habitat Increase
Inundation frequency 2022 Units
Equal or more frequent than annual 1,750 lf
Total 1,750 lf

Financials

Budget

$593,749.00
$593,749.00
$0.00
$0.00
Total
Metro Nature in Neighborhoods (Metro) $22,000.00 $0.00 $22,000.00
OWEB Focused Investment Partnership (FIP) (OWEB) $571,749.00 $0.00 $571,749.00
Total $593,749.00 $0.00 $593,749.00
Comment: None provided

Reported Expenditures

2020 2021 2022 2023 Total
Metro Nature in Neighborhoods (Metro) $8,038.00 $1,790.00 $4,500.00 $0.00 $14,328.00
OWEB Focused Investment Partnership (FIP) (OWEB) $7,527.00 $106,403.00 $394,823.00 $0.00 $508,753.00
Grand Total $15,565.00 $108,193.00 $399,323.00 $0.00 $523,081.00

Note: None provided

Focal Species

Focal Species

Increased off channel habitat, large wood structures and riparian plantings will benefit all life stages.
Increased rearing and spawning habitat.
Increased off channel habitat, large wood structures and riparian plantings will benefit all life stages.
Increased off channel habitat, large wood structures and riparian plantings will benefit all life stages.
Increased off channel habitat, large wood structures and riparian plantings will benefit all life stages.

Project Types

Project Types

CRBC and our partners are working with the Clackamas River Community Cooperative on improving habitat and educating the residents on how to treat invasive plant species, protect water quality

FIP Bienniums

FIP Bienniums

No FIP Bienniums set for this Project.

Project Details

Attachments

No attachments

No attachments

Notes

12/05/2017 2:43 PM Zachary Bergen Project Prioritization:

1.) Focal species affected:
- Three or more species

2.) Limiting factors addressed:
- Addresses two or more primary and at least one secondary
6e 3. Physical habitat quality: Degraded channel structure and complexity.
6e 4. Physical habitat quality: Degraded floodplain connectivity and function.
6e 1. Physical habitat quality: Degraded riparian areas and large wood recruitment.

3.) Project protection benefits:
- Minimal protection from private landowners.

4.) Processed-based restoration
-Partial restoration- Project partially addresses restoring natural processes. Restoration actions would include wetland enhancement, riparian restoration, the creation of side channels, invasive species removal, and native plantings.

5.) Threats addressed:
-Climate change resiliency- Restoration partially or fully addresses climate change resiliency and the project focuses on key habitats that provide resiliency.

- Urbanization/development impacts- Restoration actions partially address habitat and watershed processes associated with current and future watershed urbanization.

6.) Project size and scale:
- Stream projects (linear scale)- 1/2 to 3/4 mile in length

- Floodplain/ riparian area extent (lateral extent)- Project includes some floodplain/riparian activities.

7.) Project readiness, constraints, and risks:
-Project readiness- The project's conceptual design does consider other factors such as constructability and how project effectiveness will be demonstrated.

-Project constraints and risks- There are moderate feasibility constraints or risks that may limit overall project success.

8.) Outreach, landowner relationship, and socio-economic benefits:
-Unknown if landowners support tours or outreach activities on their properties.

External Links

No External Links entered.

Photos

Photos

  •  

    Confluence of Sieben Creek and potential side channel
(Timing: Before) (~2,284 KB)
Credit: ZBB

    Confluence of Sieben Creek and potential side channel
    (Timing: Before) (~2,284 KB)
  •  

    Location of potential side channel
(Timing: Before) (~2,499 KB)
Credit: ZBB

    Location of potential side channel
    (Timing: Before) (~2,499 KB)
  •  

    Looking upstream of from the confluence of Sieben Creek and Clackamas River
(Timing: Before) (~1,428 KB)
Credit: ZBB

    Looking upstream of from the confluence of Sieben Creek and Clackamas River
    (Timing: Before) (~1,428 KB)
  •  

    Looking upstream of from the confluence of Sieben Creek and Clackamas River
(Timing: Before) (~1,571 KB)
Credit: ZBB

    Looking upstream of from the confluence of Sieben Creek and Clackamas River
    (Timing: Before) (~1,571 KB)

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Copyright (C) 2023 Tahoe Regional Planning Agency and ESA | Code last updated (compiled) at 2023-05-18 21:33:41.