Fish Passage Site 10302249

Coordinates (dec. deg.): 58.44124°, -135.73212°
Legal Description: C040S059E06
Region: Southeast
Road Name: Wilson Road

Datum: NAD83
Quad Name / ITM: Juneau B-6
AWC Stream #:
Stream Name: Airport Ditch

Elevation:

Site Comments: None

Survey Date: Aug 13, 2011

Survey SEA11-WLR05

Project Supervisor: Gillian O'Doherty, Alaska Department of Fish and Game — Anchorage, AK
Observers: Jason Olds, Charmagne Gutierrez

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: Yes

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert gradient gray
  2. Mechanical damage or joints parting

Comments: 4 pipe system, water stagnant and ponded upstream and downstream of culverts. Fish observed downstream in pond. Many Bufa borealis morphs observed around culverts. Large amounts of shrub and tree trimmings left at inverts. Culvert 1 dry.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Gray
 
Length(ft): 36.3
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 3.0
Condition Rating(1-5): 2
Approach Angle: 11.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):3.0 3.0
Height(ft):3.0 3.0
Apron Length(ft):
Water Depth(ft): 0.0
Rustline Height(ft):0.7
Substrate Depth(ft):0.0 0.0
Backwatered?: Yes
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio:
Culvert Gradient: 0.47%
Max Slope:
Max Slope Length:
 

Comments: Mechanical damage to interior of pipe visible. Dry
  Culvert Observations:
  1. Culvert gradient gray
  2. Mechanical damage or joints parting
ID: 2 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 36.8
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle: 11.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):3.0 3.0
Height(ft):3.0 3.0
Apron Length(ft):
Water Depth(ft): 0.55
Rustline Height(ft):0.7
Substrate Depth(ft):0.0 0.0
Backwatered?: Yes
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio:
Culvert Gradient: 0.63%
Max Slope:
Max Slope Length:
 

Comments: Pipe 2 is backwatered.
  Culvert Observations:
  1. None of this type
ID: 3 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 37.2
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle: 11.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):3.0 3.0
Height(ft):3.0 3.0
Apron Length(ft):
Water Depth(ft): 0.34
Rustline Height(ft):0.7
Substrate Depth(ft):0.0 0.0
Backwatered?: Yes
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio:
Culvert Gradient: -0.08%
Max Slope:
Max Slope Length:
 

Comments: Pipe 3 is backwatered.
  Culvert Observations:
  1. None of this type
ID: 4 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 36.9
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle: 11.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):3.0 3.0
Height(ft):3.0 3.0
Apron Length(ft):
Water Depth(ft): 0.08
Rustline Height(ft):0.7
Substrate Depth(ft):0.0 0.0
Backwatered?: Yes
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio:
Culvert Gradient: -0.14%
Max Slope:
Max Slope Length:
 

Comments: Pipe 4 is backwatered.
  Culvert Observations:
  1. None of this type

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:OrganicOrganic
Subdominant:SandSand
Stream Slope(deg.):
Stream Flow Stage:Low

No stream width data available.

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 96.91
D/S Water Surface Elev (Wetted pool surface edge) 0.00 91.34
D/S Tailcrest or 1st Thalweg (dry) 8.00 91.35
Outlet Pool Water Elev 25.00 91.37
Max Pool Depth 25.00 89.63
Outlet Invert (C2) 2 34.00 90.81
Outlet Invert (C1, dry) 1 34.00 90.88
Outlet Invert (C3) 3 34.00 91.02
D/S Water Surface Elev (C2) 2 34.00 91.36
D/S Water Surface Elev (C3) 3 34.00 91.36
D/S Water Surface Elev (C4) 4 34.00 91.36
Outlet Invert (C4) 4 34.00 91.28
Outlet Culvert Top (C4) 4 34.00 94.22
Outlet Culvert Top (C1) 1 34.00 93.69
Outlet Culvert Top (C2) 2 34.00 93.81
Outlet Culvert Top (C3) 3 34.00 94.09
Inlet Culvert Top (C1) 1 70.00 94.14
Inlet Culvert Top (C3) 3 70.00 94.15
Inlet Culvert Top (C2) 2 70.00 94.16
Inlet Culvert Top (C4) 4 70.00 94.42
U/S Water Surface Elev (C2) 2 70.00 91.38
U/S Water Surface Elev (C3) 3 70.00 91.38
U/S Water Surface Elev (C4) 4 70.00 91.38
Inlet Culvert Invert (C2) 2 70.00 91.04
Inlet Culvert Invert (C1, dry) 1 70.00 91.05
Inlet Culvert Invert (C4) 4 70.00 91.23
Inlet Culvert Invert (C3) 3 70.00 90.99
U/S Headwater 72.00 91.38
Misc. (Survey point, dry) 75.00 91.75

Notes:

  1. River distance is measured continuously throughout the survey reach along the thalweg of the stream.
  2. Measured from each end of the crossing along the thalweg of the stream.

Fish Sampling Efforts

Gear Type: Visual Observation, Ground (A) Trap Duration(h): 0.25
Channel Type: Main Channel (>50% of water flow)
Comments: Juvenile fish observed visually in pond downstream.

Fish Observations

Species: juvenile salmonid-unspecified Life History: Unknown
Total Fish Observed: 1 Fish Measured: 1 Fork Lengths (mm) Min: 80 Max: 80 Mean: 80
Collected/Observed by Gear Type: Downstream Visual Observation, Ground (1)  

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