Fish Passage Site 20401359

Coordinates (dec. deg.): 61.56653°, -149.31348°
Legal Description: S017N001E17
Region: South Central
Road Name: Fireweed Road

Datum: NAD83
Quad Name / ITM: Anchorage C-7
AWC Stream #: 247-50-10260-2019-3038
Stream Name: Wasilla Creek tributary

Elevation:

Site Comments: 80 ft downstream (channel length) is inlet to culvert under Alaska Railroad grade.

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-WA079

Observers: Edward Weiss, Olof Jacobsson

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools:
Construction Year:


Comments: Larger pipe is blocked with 4 X 8 wood to maintain water level in upstream wetland pond.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated Metal) Fish Passage Rating:
 
Length(ft): 51.0
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: Sand
Outlet Substrate: Sand
InletOutlet
Width(ft):3.0 3.0
Height(ft):2.7 2.4
Apron Length(ft):
Water Depth(ft):0.3 0.2
Rustline Height(ft):
Substrate Depth(ft):0.3 0.6
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height:
Outfall Type:
Constriction Ratio:
Culvert Gradient: 0.76%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Improper bedding
ID: 2 Structure Type: Circular pipe (Corrugated Metal) Fish Passage Rating:
 
Length(ft): 46.0
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: Sand
Outlet Substrate: Sand
InletOutlet
Width(ft):2.0 2.0
Height(ft):2.0 2.0
Apron Length(ft):
Water Depth(ft):0.5 0.2
Rustline Height(ft):
Substrate Depth(ft):0.0 0.0
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height:
Outfall Type:
Constriction Ratio:
Culvert Gradient: 1.09%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Cut-slope slumping or sliding into culvert (single event)

Stream Measurements

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

No stream width data available.

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
U/S Thalweg 91.30
D/S Thalweg 88.66
Outlet Culvert Top 2 93.11
Outlet Culvert Top 1 93.21
Inlet Culvert Top 2 93.49
Inlet Culvert Top 1 94.01
D/S Thalweg 0.00 120.0 88.29
Outlet Thalweg 1 120.00 0.0 90.84
Outlet Invert 1 120.00 0.0 90.86
Outlet Thalweg 2 120.00 0.0 90.86
Outlet Invert 2 120.00 0.0 91.03
Road Elev 144.00 95.00
Road Elev 144.00 95.19
Inlet Thalweg 1 168.00 0.0 92.02
Inlet Culvert Invert 1 168.00 0.0 91.25
Inlet Culvert Invert 2 168.00 0.0 91.53
Inlet Thalweg 2 168.00 0.0 91.53
U/S Thalweg 1 168.50 0.5 91.56
U/S Thalweg 176.00 8.0 90.51

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): 20
Comments: Slow water set.
 
Gear Type: Minnow Trap (B) Trap Duration(h): 20
Comments: Fast water set.

Fish Observations

Species: juvenile/adult Dolly Varden Life History: Unknown
Total Fish Observed: 2 Fish Measured: 1 Fork Lengths (mm) Min: 138 Max: 138 Mean: 138
Collected/Observed by Gear Type: Downstream Minnow Trap ()  Upstream Minnow Trap (2)  
 
Species: juvenile coho salmon Life History: Anadromous
Total Fish Observed: 28 Fish Measured: 12 Fork Lengths (mm) Min: 62 Max: 118 Mean: 87
Collected/Observed by Gear Type: Downstream Minnow Trap (4)  Upstream Minnow Trap (24)  
 
Species: juvenile/adult sculpin-unspecified Life History: Resident
Total Fish Observed: 4 Fish Measured: 2 Fork Lengths (mm) Min: 58 Max: 86 Mean: 72
Collected/Observed by Gear Type: Downstream Minnow Trap (2)  Upstream Minnow Trap (2)  

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