Fish Passage Site 20401335

Coordinates (dec. deg.): 61.63222°, -149.20032°
Legal Description: S018N001E24
Region: South Central
Road Name: private drive

Datum: NAD83
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-WA028

Observers: Edward Weiss, Olof Jacobsson, Joe Conner

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: No

Step Pools:
Construction Year:


Comments: None

Culvert Measurements

ID: 1 Structure Type: Open-bottom arch (Corrugated Metal) Fish Passage Rating:
 
Length(ft): 20.0
Inlet Type: Headwall
Outlet Type:
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.0
Condition Rating(1-5):
Approach Angle:
Sedimentation At Inlet:
Inlet Substrate: Gravel
Outlet Substrate: Gravel
InletOutlet
Width(ft):6.0
Height(ft):3.0
Apron Length(ft):
Water Depth(ft):0.9
Rustline Height(ft):
Substrate Depth(ft):
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height:
Outfall Type:
Constriction Ratio:
Culvert Gradient: -1.60%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. None of this type
ID: 2 Structure Type: Open-bottom arch (Corrugated Metal) Fish Passage Rating:
 
Length(ft): 20.0
Inlet Type: Headwall
Outlet Type:
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.0
Condition Rating(1-5):
Approach Angle:
Sedimentation At Inlet:
Inlet Substrate: Gravel
Outlet Substrate: Gravel
InletOutlet
Width(ft):6.0
Height(ft):3.0
Apron Length(ft):
Water Depth(ft):1.1 1.3
Rustline Height(ft):
Substrate Depth(ft):
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height:
Outfall Type:
Constriction Ratio:
Culvert Gradient:
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. None of this type
ID: 3 Structure Type: Open-bottom arch (Corrugated Metal) Fish Passage Rating:
 
Length(ft): 20.0
Inlet Type: Headwall
Outlet Type:
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.0
Condition Rating(1-5):
Approach Angle:
Sedimentation At Inlet:
Inlet Substrate: Gravel
Outlet Substrate: Gravel
InletOutlet
Width(ft):6.0 6.0
Height(ft):3.0 3.0
Apron Length(ft):
Water Depth(ft):0.55 1.0
Rustline Height(ft):
Substrate Depth(ft):
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height:
Outfall Type:
Constriction Ratio:
Culvert Gradient:
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 20.00
Downstream ordinary high water 85.0 23.00
Upstream ordinary high water 2.0 22.00
Upstream ordinary high water 50.0 16.00
Upstream ordinary high water 100.0 17.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Thalweg 89.96
Inlet Culvert Top (see data sheet) 3 92.60
Inlet Culvert Top (see data sheet) 2 92.61
Inlet Culvert Top (see data sheet) 1 92.64
Outlet Culvert Top (see data sheet) 3 92.80
Outlet Culvert Top (see data sheet) 2 92.85
Outlet Culvert Top (see data sheet) 1 92.96
D/S Thalweg 0.00 85.0 90.00
D/S Tailcrest or 1st Thalweg (distance is approximation) 72.50 12.5 90.56
D/S Thalweg 81.00 4.0 89.78
Outlet Thalweg (see data sheet) 3 85.00 0.0 89.88
Outlet Invert (see data sheet) 3 85.00 0.0 90.04
Outlet Invert (see data sheet) 1 85.00 0.0 90.63
Outlet Thalweg (see data sheet) 1 85.00 0.0 90.65
Outlet Thalweg (see data sheet) 2 85.00 0.0 89.73
Road Elev 95.00 94.60
Road Elev 95.00 94.61
Inlet Culvert Invert (see data sheet) 2 105.00 0.0 90.08
Inlet Culvert Invert (see data sheet) 1 105.00 0.0 90.31
Inlet Culvert Invert (see data sheet) 3 105.00 0.0 90.52
U/S Thalweg (see data sheet) 2 106.50 1.5 90.20
U/S Thalweg (see data sheet) 3 106.50 1.5 90.22
U/S Thalweg 155.00 50.0 90.40
U/S Thalweg 205.00 100.0 90.38

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): -238

Fish Observations

Species: juvenile/adult Dolly Varden Life History: Unknown
Total Fish Observed: 15 Fish Measured: 7 Fork Lengths (mm) Min: 55 Max: 129 Mean: 109
Collected/Observed by Gear Type: Downstream Minnow Trap (14)  Upstream Minnow Trap (1)  
 
Species: juvenile Chinook salmon Life History: Anadromous
Total Fish Observed: 4 Fish Measured: 2 Fork Lengths (mm) Min: 57 Max: 63 Mean: 60
Collected/Observed by Gear Type: Upstream Minnow Trap (4)  
 
Species: juvenile coho salmon Life History: Anadromous
Total Fish Observed: 10 Fish Measured: 5 Fork Lengths (mm) Min: 48 Max: 110 Mean: 67
Collected/Observed by Gear Type: Downstream Minnow Trap (4)  Upstream Minnow Trap (6)  

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