Old Tyonek Creek Tributary Culvert Survey and Design

Salmonid Restoration Planning and Assessments

Project ID	AK56010
Recovery Domains	-
Start Date	03/01/2023
End Date	05/31/2024
Year	2022
Status	Completed
Last Edited	05/01/2025

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Description

This project developed the engineering and design documentation needed for a fish-friendly culvert replacement on a tributary of Old Tyonek Creek in West Cook Inlet. It generated a hydrology and hydraulics (H&H) report and completed the 100% design construction plans for the culvert replacement, set for construction in 2025. The design adhered to the FWS Culvert Design Guidelines for Ecological Function, ensuring ecological integrity and the longevity of the investment. Replacing the undersized culvert (Alaska Department of Fish and Game culvert #20601535) will restore habitat connectivity for 1.4 km of stream and 1.4 ha of wetland, benefiting the coho salmon (Oncorhynchus kisutch) population vital to the Tyonek Subdistricts subsistence setnet fishery in Cook Inlet.

Project Benefit

This project will provide design and engineering plans for a culvert replacement that will make accessible the full extent of salmon habitat along an Old Tyonek Creek tributary, reconnecting 1.4 km of stream and 1.4 ha of wetlands. A fish-friendly culvert will restore self-sustaining natural ecosystem function and processes along this creek tributary and wetland area and ensure that the connectivity between both sides of the road is maintained so anadromous fishes are able to easily move through habitat as needed for their growth and survival.

Accomplishments

Metric

Completed

Originally
Proposed

Planning and Assessment

Stream Miles Assessed

.31

.60

Source

Funds

PCSRF

$67,500

Other

$26,527

Report Total:

$94,027

Worksites

52653665

Worksite Identifier: 52653665
Start Date:
End Date:

Area Description

No Area Description data was found for this worksite.

Location Information

Basin: Western Cook Inlet (190206)
Subbasin: Redoubt-Trading Bays (19020601)
Watershed: Old Tyonek Creek-Frontal Cook Inlet (1902060119)
Subwatershed: Old Tyonek Creek (190206011903)

State: Alaska
Recovery Domain:
Latitude: 61.066578
Longitude: -151.32608

ESU

Un-Named ESU Coho

Map

Photos

Metrics

B.0 Salmonid Restoration Planning and AssessmentsY (Y/N)
- . . B.0.a Planning And Assessment Funding 94,027.00
- . . B.0.b.1 Area Encompassed .0
- . . B.1 Restoration Planning And CoordinationY (Y/N)
  - . . . . B.1.a Planning and Coordination funding 91,379.00
  - . . . . B.1.b.11 Engineering/design work for restoration projectsY (Y/N)
    - . . . . . . B.1.b.11.a
      Name of plan implemented
      
      Tyonek Tribal Conservation District culvert prioritization (2021)
    - . . . . . . B.1.b.11.b
      Description and scope of the plan implemented
      
      This project developed design and engineering plans for a fish-friendly culvert to replace the existing fish passage barrier culvert #20601535.
  - . . B.2 Salmonid Habitat Assessment / InventoryY (Y/N)
    - . . . . B.2.a Habitat Assessment Funding 2,647.64
    - . . . . B.2.c Instream SurveyY (Y/N)
      - . . . . . . B.2.c.1 Type of instream survey (LOV)
      - . . . . . . B.2.c.2 Stream miles assessed .31
      - . . . . . . B.2.c.3 Stream miles assessed that contained salmonids .31
      - . . . . . . B.2.c.4 Stream miles assessed that needed restoration .00
      - . . . . . . B.2.c.5 Stream miles assessed for regulatory actions .00
      - . . . . . . B.2.c.6 Fish passage impediments identified 0