Fish Passage Site 20200940

Coordinates (dec. deg.): 60.16592°, -149.40423°
Legal Description: S001N001W23
Region: South Central
Road Name: Seward Highway

Datum: NAD83
Quad Name / ITM: Seward A-7
AWC Stream #: 231-30-10080-2010-3031
Stream Name: Unnamed

Elevation:

Site Comments: Channel makes a 90 degree angle at outlet pool.

Survey Date: Aug 29, 2001

Survey KPCS1-EK056

Observers: Cecil Rich, William Glick, James Maple

Overall Fish Passage Rating: Gray

Tidal: No
Backwatered: No

Step Pools:
Construction Year:


Comments: Channel makes a 90 degree angle at outlet pool. Culverts not depressed, resting on channel bottom.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated Metal) Fish Passage Rating:
 
Length(ft): 81.0
Inlet Type: Projecting
Outlet Type:
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.0
Condition Rating(1-5):
Approach Angle:
Sedimentation At Inlet:
Inlet Substrate: None
Outlet Substrate: Sand
InletOutlet
Width(ft):4.9 4.9
Height(ft):5.12 5.08
Apron Length(ft):
Water Depth(ft):1.17 1.38
Rustline Height(ft):
Substrate Depth(ft):0.0 0.0
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height: 0.02
Outfall Type:
Constriction Ratio: 0.67
Culvert Gradient: 0.59%
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): 81.0
Inlet Type: Projecting
Outlet Type:
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.0
Condition Rating(1-5):
Approach Angle:
Sedimentation At Inlet:
Inlet Substrate: None
Outlet Substrate: Sand
InletOutlet
Width(ft):4.9 4.9
Height(ft):5.15 5.06
Apron Length(ft):
Water Depth(ft):1.21 1.33
Rustline Height(ft):
Substrate Depth(ft):0.0 0.0
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height: 0.02
Outfall Type:
Constriction Ratio: 0.67
Culvert Gradient: 0.36%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. None of this type

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:SandSand
Stream Slope(deg.):
Stream Flow Stage:
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 26.0 17.20
Downstream ordinary high water 67.0 13.80
Downstream ordinary high water 102.0 13.00
Upstream ordinary high water 5.0 11.30
Upstream ordinary high water 50.0 10.50
Upstream ordinary high water 92.0 18.60

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Thalweg 0.00 102.0 86.23
D/S OHW Elev 0.00 102.0 86.75
D/S Water Surface Elev 0.00 102.0 86.96
D/S OHW Elev 35.00 67.0 87.02
D/S Thalweg 35.00 67.0 86.69
D/S Water Surface Elev 35.00 67.0 87.27
OHW Left Bank 76.00 26.0 87.30
D/S Water Surface Elev 76.00 26.0 87.54
D/S Tailcrest or 1st Thalweg 76.00 26.0 86.31
Max Pool Depth 97.00 5.0 84.12
D/S Thalweg 97.00 5.0 84.12
OHW Left Bank 97.00 5.0 87.42
OHW Left Bank 97.00 5.0 87.58
Outlet Invert 1 102.00 0.0 86.17
Outlet Thalweg 1 102.00 0.0 86.17
Outlet Rustline Height 2 102.00 0.0 86.96
Outlet Rustline Height 1 102.00 0.0 86.98
Outlet Invert 2 102.00 0.0 86.27
Outlet Thalweg 2 102.00 0.0 86.27
Outlet Culvert Top 1 102.00 0.0 91.25
Outlet Culvert Top 2 102.00 0.0 91.33
Road Elev 142.50 0.0 97.29
Road Elev 142.50 98.23
Inlet Culvert Top 2 183.00 0.0 91.71
Inlet Culvert Top 1 183.00 0.0 91.77
Inlet Culvert Invert 1 183.00 0.0 86.65
Inlet Thalweg 1 183.00 0.0 86.65
Inlet Culvert Invert 2 183.00 0.0 86.56
Inlet Thalweg 2 183.00 0.0 86.56
Inlet Rustline Height 2 183.00 0.0 87.25
Inlet Rustline Height 1 183.00 0.0 87.31
U/S Thalweg 2 184.00 1.0 86.60
U/S Thalweg 1 184.00 1.0 86.79
U/S Thalweg 1 188.00 5.0 86.94
U/S Thalweg 2 188.00 5.0 87.21
U/S OHW elevation 1 188.00 5.0 87.60
U/S Water Surface Elev 1 188.00 5.0 87.79
U/S Thalweg 1 192.80 9.8 87.33
U/S Thalweg 233.00 50.0 87.21
U/S Headwater 233.00 50.0 87.94
U/S Water Surface Elev 233.00 50.0 88.10
U/S Headwater 275.00 92.0 88.23
U/S Water Surface Elev 275.00 92.0 88.46
U/S Thalweg 275.00 92.0 87.56

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): 1.45
 
Gear Type: Minnow Trap (B) Trap Duration(h): 2.0

Fish Observations

Species: juvenile Dolly Varden Life History: Resident
Total Fish Observed: 26 Fish Measured: 11 Fork Lengths (mm) Min: 71 Max: 125 Mean: 83
Collected/Observed by Gear Type: Downstream Minnow Trap (24)  Upstream Minnow Trap (2)  
 
Species: juvenile coho salmon Life History: Anadromous
Total Fish Observed: 38 Fish Measured: 16 Fork Lengths (mm) Min: 42 Max: 82 Mean: 63
Collected/Observed by Gear Type: Downstream Minnow Trap (26)  Upstream Minnow Trap (12)  

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