Fish Passage Site 10302159

Coordinates (dec. deg.): 58.35938°, -134.50888°
Legal Description: C040S066E34
Region: Southeast
Road Name: Glacier Highway

Datum: NAD83
Quad Name / ITM: Juneau B-2
AWC Stream #:
Stream Name: Switzer Creek

Elevation:

Site Comments: No traps were set as stream is already in the AWC.

Survey Date: Jun 22, 2011

Survey SEA11-GLH04

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

Overall Fish Passage Rating: Green

Tidal: Yes
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. None of this type

Comments: Top of miter distances from zero point were as follows: culvert 1 at 78.35 feet and culvert 2 at 79.3 feet. Pipe may be tidally influenced at extremely high tides. Some garbage debris in creek. Potential for backwater in culvert 1 but water is flowing through. Coho fry were observed upstream, downstream and inside of pipe.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 92.35
Inlet Type: Mitered
Outlet Type: Mitered
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle: 48.0
Sedimentation At Inlet: Yes
Inlet Substrate: Gravel
Outlet Substrate: Gravel
InletOutlet
Width(ft):9.2 9.1
Height(ft):7.3 6.65
Apron Length(ft):
Water Depth(ft): 1.02
Rustline Height(ft):4.0
Substrate Depth(ft):2.0 2.5
Backwatered?: No
Baffles Present: No
Embedded?: Yes
Embedded Depth(ft): 2.0
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 1.57
Culvert Gradient: -0.19%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. None of this type
ID: 2 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 93.3
Inlet Type: Mitered
Outlet Type: Mitered
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle: 48.0
Sedimentation At Inlet: Yes
Inlet Substrate: Gravel
Outlet Substrate: Gravel
InletOutlet
Width(ft):8.7 9.2
Height(ft):6.5 6.45
Apron Length(ft):
Water Depth(ft): 0.63
Rustline Height(ft):3.6
Substrate Depth(ft):2.6 2.6
Backwatered?: No
Baffles Present: No
Embedded?: Yes
Embedded Depth(ft): 2.6
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 1.57
Culvert Gradient: 0.20%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. None of this type

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:CobbleSilt/Clay
Stream Slope(deg.):0.09
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 44.0 8.40
Upstream ordinary high water 91.0 8.20
Upstream ordinary high water 188.0 7.60

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 99.55
D/S Water Surface Elev 0.00 87.20
D/S Grade Ctrl (Thalweg) 0.00 87.33
D/S Water Surface Elev 28.00 88.27
D/S Tailcrest or 1st Thalweg 28.00 87.70
Outlet Pool Water Elev 39.00 88.27
Max Pool Depth 39.00 86.88
Outlet Invert (Invert out, culvert 1, on substrate, end of miter) 1 70.00 87.26
D/S Water Surface Elev (Invert out, culvert 1, end of miter) 1 70.00 88.28
D/S Water Surface Elev (Invert out, culvert 2, end of miter) 2 70.00 88.31
Outlet Invert (Invert out, culvert 2, on substrate, end of miter) 2 70.00 87.68
Outlet Culvert Top (Invert out, culvert 2, on metal, top of miter) 2 77.20 94.33
Outlet Culvert Top (Invert out, culvert 1, on metal, top of miter) 1 78.00 94.48
Inlet Culvert Top (Invert in, culvert 2, on metal, top of miter) 2 142.10 94.49
Inlet Culvert Top (Invert in, culvert 1, on metal, top of miter) 1 142.35 94.33
U/S Headwater (Invert in, culvert 1, end of miter) 1 148.35 88.43
Inlet Culvert Invert (Invert in, culvert 1, on substrate, end of miter) 1 148.35 87.65
U/S Headwater (Invert in, culvert 2, end of miter) 2 149.30 88.43
Inlet Culvert Invert (Invert in, culvert 2, on substrate, end of miter) 2 149.30 87.94
U/S Water Surface Elev 210.00 88.50
U/S Grade Ctrl (Thalweg) 210.00 87.18
U/S Grade Ctrl (Thalweg) 280.00 86.51
U/S Water Surface Elev 280.00 88.50
U/S Water Surface Elev 316.00 88.58
U/S Grade Ctrl (Thalweg) 316.00 86.91

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): 30.0
Channel Type: Main Channel (>50% of water flow)
Comments: Visual observation of juvenile coho upstream and downstream of culvert.
 
Gear Type: Visual Observation, Ground (B) Trap Duration(h): 30.0
Channel Type: Main Channel (>50% of water flow)
Comments: Visual observation

Fish Observations

Species: juvenile coho salmon Life History: Unknown
Total Fish Observed: 0 Fish Measured: 0 Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: Downstream Visual Observation, Ground (0)  Upstream Visual Observation, Ground (0)  

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