Sieben-Riverbend Side Channel Enhancement
Project Overview
Basics
Sieben-Riverbend Side Channel Enhancement
Completed
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 with the Clackamas River. The project increased channel complexity and connectivity of the 1/3 mile long side channel. The constructed apex jam is racking up material and created a scour pool frequented by juvenile salmonids and other native fishes. Habitat structures throughout the channel have added structure, provide cover and help form scour pools. Log structures built in the alcove at the downstream end of the project provide additional complexity and habitat for our native fish and wildlife.
2020
2022
2024
12/2/2024
Location
Right bank above Sah-Hah-Lee Golf Course
On lower Mainstem Clackamas River
Organizations
| Funders | |
| Lead Implementer | |
| Other Partners | BLM |
Contacts
Isaac Sanders - Clackamas River Basin Council (CRBC) (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 |
| > 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 | 4 | acres |
| Total | 4 | acres |
| Side Channel Habitat Increase | ||
|---|---|---|
| Inundation frequency | 2022 | Units |
| Equal or more frequent than annual | 1,750 | lf |
| Total | 1,750 | lf |
Financials
Budget
| Comment: | None provided |
|---|
Reported Expenditures
| 2020 | 2021 | 2022 | 2023 | 2024 | Total | |
|---|---|---|---|---|---|---|
| Bureau of Land Management (BLM) | $0.00 | $0.00 | $67,500.00 | $0.00 | $0.00 | $67,500.00 |
| Metro Nature in Neighborhoods (Metro) | $8,038.00 | $1,790.00 | $4,500.00 | $0.00 | $0.00 | $14,328.00 |
| OWEB Focused Investment Partnership (FIP) (OWEB) | $7,527.00 | $106,403.00 | $394,823.00 | $60,000.23 | $25,406.00 | $594,159.23 |
| Grand Total | $15,565.00 | $108,193.00 | $466,823.00 | $60,000.23 | $25,406.00 | $675,987.23 |
| Note: | BLM expenditure is in-kind in logs for project |
|---|
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
Project Details
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.