Fish Passage Site 20401350

Coordinates (dec. deg.): 61.66132°, -149.18829°
Legal Description: S018N001E12
Region: South Central
Road Name: Crabb Circle

Datum: WGS84
Quad Name / ITM: Anchorage C-6
AWC Stream #: 247-50-10260-2019
Stream Name: Wasilla Creek

Elevation:

Site Comments: None

Multiple surveys have been conducted at this site — click on the drop down
arrow to the right of the survey date below to choose a different report for this site.

Survey MSCS1-WA046

Observers: Edward Weiss, Olof Jacobsson, Joe Conner

Overall Fish Passage Rating: Gray

Tidal: No
Backwatered: No

Step Pools:
Construction Year:


Comments: None

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated Metal) Fish Passage Rating:
 
Length(ft): 50.0
Inlet Type: Projecting
Outlet Type:
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5):
Approach Angle:
Sedimentation At Inlet:
Inlet Substrate: Gravel
Outlet Substrate: Gravel
InletOutlet
Width(ft):5.0 5.0
Height(ft):5.0 5.0
Apron Length(ft):
Water Depth(ft):1.1 0.9
Rustline Height(ft):
Substrate Depth(ft):0.5 0.66
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height:
Outfall Type:
Constriction Ratio: 0.57
Culvert Gradient: -0.04%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. None of this type
ID: 2 Structure Type: Circular pipe (Corrugated Metal) Fish Passage Rating:
 
Length(ft): 50.0
Inlet Type: Projecting
Outlet Type:
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5):
Approach Angle:
Sedimentation At Inlet:
Inlet Substrate: Gravel
Outlet Substrate: Gravel
InletOutlet
Width(ft):5.0 5.0
Height(ft):5.0 5.0
Apron Length(ft):
Water Depth(ft):1.65 1.15
Rustline Height(ft):
Substrate Depth(ft):0.0 0.45
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height:
Outfall Type:
Constriction Ratio: 0.57
Culvert Gradient: -0.50%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. None of this type

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:
Subdominant:
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 50.0 11.00
Upstream ordinary high water 50.0 15.00
Upstream ordinary high water 110.0 20.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Thalweg 88.11
U/S Thalweg 89.25
Outlet Culvert Top 2 92.83
Outlet Culvert Top 1 92.84
Inlet Culvert Top 1 92.94
Inlet Culvert Top 2 92.97
D/S Thalweg 0.00 75.0 89.98
D/S Tailcrest or 1st Thalweg 67.00 8.0 88.99
D/S Thalweg 69.00 6.0 88.37
Outlet Thalweg 2 75.00 0.0 88.47
Outlet Invert 1 75.00 0.0 88.50
Outlet Thalweg 1 75.00 0.0 88.57
Outlet Invert 2 75.00 0.0 88.26
Road Elev 100.00 94.19
Road Elev 100.00 94.71
Inlet Culvert Invert 2 125.00 0.0 88.01
Inlet Thalweg 2 125.00 0.0 87.74
Inlet Culvert Invert 1 125.00 0.0 88.48
U/S Thalweg 1 126.50 1.5 88.63
U/S Thalweg 2 126.50 1.5 87.88
U/S Thalweg 235.00 110.0 89.75

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: Minnow Trap (A) Trap Duration(h): 1
 
Gear Type: Minnow Trap (B) Trap Duration(h): 1
 
Gear Type: Visual Observation, Ground (C)

Fish Observations

Species: juvenile/adult Dolly Varden Life History: Unknown
Total Fish Observed: 12 Fish Measured: 6 Fork Lengths (mm) Min: 95 Max: 124 Mean: 105
Collected/Observed by Gear Type: Downstream Minnow Trap (4)  Upstream Minnow Trap (8)  
 
Species: adult Chinook salmon Life History: Anadromous
Total Fish Observed: 1 Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: Upstream Visual Observation, Ground (1)  
Comments: One adult king salmon observed in culvert.
 
Species: adult chum salmon Life History: Anadromous
Total Fish Observed: 1 Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: Upstream Visual Observation, Ground (1)  
Comments: One adult chum salmon observed in culvert.
 
Species: juvenile coho salmon Life History: Anadromous
Total Fish Observed: 4 Fish Measured: 3 Fork Lengths (mm) Min: 78 Max: 109 Mean: 94
Collected/Observed by Gear Type: Downstream Minnow Trap (4)  

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