Fish Passage Site 20503802

Coordinates (dec. deg.): 61.76166°, -150.06599°
Legal Description: S019N004W06
Region: South Central
Road Name: West Lillie Johnson Avenue

Datum: NAD83
Quad Name / ITM: Tyonek D-1
AWC Stream #:
Stream Name: Willow Lake Outlet

Elevation:

Site Comments: None

Survey Date: Sep 25, 2018

Survey UPDATE-LJA01

Project Supervisor: Gillian O'Doherty, ADFG
Observers: Mark Eisenman, Shane Hetzog

Overall Fish Passage Rating: Black

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Comments: Basic culvert measurements and photos taken during site visit. Site needs full assessment. Ponded upstream. C2 taking most flow. C1 set higher. Both culvert have beaver excluders at the inlet. Both culvert appear to be blocked by a beaver dam and debris creating a fish passage barrier. C2 set lower and diagonally to the road. C2 outlet comes out farther downstream and lower than C1.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Black
 
Length(ft):
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.):
Corrugation Width(in.):
Condition Rating(1-5): 2
Approach Angle:
Sedimentation At Inlet:
Inlet Substrate:
Outlet Substrate:
InletOutlet
Width(ft):2.0 2.0
Height(ft):2.0 2.0
Apron Length(ft):
Water Depth(ft):
Rustline Height(ft):
Substrate Depth(ft):
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio:
Culvert Gradient:
Max Slope:
Max Slope Length:
 

Comments: Beaver fencing around inlet has become clogged with debris forming a barrier. Cuvlert measured.
  Culvert Observations:
  1. Beaver Activity
ID: 2 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Black
 
Length(ft):
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.):
Corrugation Width(in.):
Condition Rating(1-5): 2
Approach Angle:
Sedimentation At Inlet:
Inlet Substrate:
Outlet Substrate:
InletOutlet
Width(ft):1.5 1.5
Height(ft):1.5 1.5
Apron Length(ft):
Water Depth(ft):
Rustline Height(ft):
Substrate Depth(ft):
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height:
Outfall Type: At Stream Grade
Constriction Ratio:
Culvert Gradient:
Max Slope:
Max Slope Length:
 

Comments: Beaver grate at inlet. Beaver dam has been built upstream around grating.

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:
Subdominant:
Stream Slope(deg.):
Stream Flow Stage:Medium

No stream width data available.

Elevations

No elevation data available.

Fish Sampling Efforts

Gear Type: Minnow Trap (A) Trap Duration(h): 4.83
 
Gear Type: Minnow Trap (B) Trap Duration(h): 5.75
 
Gear Type: Angling (C)

Fish Observations

Species: Alaska blackfish Life History: Resident
Total Fish Observed: 14 Fish Measured: 14 Fork Lengths (mm) Min: 85 Max: 134 Mean: 111
Collected/Observed by Gear Type: Upstream Minnow Trap (2)  Downstream Minnow Trap (12)  
 
Species: juvenile coho salmon Life History: Unknown
Total Fish Observed: 5 Fish Measured: 5 Fork Lengths (mm) Min: 64 Max: 115 Mean: 92
Collected/Observed by Gear Type: Upstream Angling (2)  Downstream Minnow Trap (3)  
 
Species: juvenile/adult rainbow trout Life History: Unknown
Total Fish Observed: 1 Fish Measured: 1 Fork Lengths (mm) Min: 220 Max: 220 Mean: 220
Collected/Observed by Gear Type: Upstream Angling (1)  
 
Species: threespine stickleback Life History: Resident
Total Fish Observed: 2 Fish Measured: 2 Fork Lengths (mm) Min: 39 Max: 45 Mean: 42
Collected/Observed by Gear Type: Upstream Minnow Trap (2)  

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