Fish Passage Site 20300962

Coordinates (dec. deg.): 60.73092°, -149.33543°
Legal Description: S007N001E06
Region: South Central
Road Name: Seward Highway

Datum: NAD83
Quad Name / ITM: Seward C-7
AWC Stream #:
Stream Name: Unnamed

Elevation:

Site Comments: None

Survey Date: Oct 04, 2001

Survey KPCS1-EK096

Observers: Cecil Rich, James Maple, Tom Sigurdsson

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools:
Construction Year:


Comments: Observed adult coho 130 feet downstream. Scoured outlet pool. Material from inlet fill slope scoured during high flow event and deposited in large bar midchannel below outlet pool.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated Metal) Fish Passage Rating:
 
Length(ft): 111.6
Inlet Type: Flared Inlet
Outlet Type:
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 3.0
Condition Rating(1-5):
Approach Angle:
Sedimentation At Inlet:
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):4.0 4.0
Height(ft):4.02 3.83
Apron Length(ft):
Water Depth(ft):0.46 0.06
Rustline Height(ft):
Substrate Depth(ft):0.0 0.0
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height: 0.06
Outfall Type:
Constriction Ratio: 0.21
Culvert Gradient: 0.60%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. None of this type

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:GravelGravel
Stream Slope(deg.):
Stream Flow Stage:
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 13.0 8.50
Downstream ordinary high water 54.0 11.20
Downstream ordinary high water 111.5 3.00
Upstream ordinary high water 5.0 8.20
Upstream ordinary high water 50.0 8.70
Upstream ordinary high water 103.0 29.50

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Thalweg 87.62
D/S OHW Elev 0.00 111.5 89.58
D/S Thalweg 0.00 111.5 89.12
D/S Water Surface Elev 0.00 111.5 89.33
D/S Thalweg 57.50 54.0 89.37
D/S Water Surface Elev 57.50 54.0 89.87
D/S OHW Elev 57.50 54.0 90.10
D/S Water Surface Elev 98.50 13.0 90.00
D/S Tailcrest or 1st Thalweg 98.50 13.0 89.83
OHW Left Bank 98.50 13.0 90.40
Max Pool Depth 106.50 5.0 87.90
OHW Left Bank 106.50 5.0 90.04
OHW Left Bank 106.50 5.0 90.33
Outlet Rustline Height 1 111.50 0.0 90.33
Outlet Invert 1 111.50 0.0 90.04
Outlet Thalweg 1 111.50 0.0 90.04
Outlet Culvert Top 1 111.50 0.0 93.87
Road Elev 167.00 97.54
Road Elev 167.00 98.12
Inlet Culvert Top 1 222.50 0.0 94.73
Inlet Culvert Invert 1 222.50 0.0 90.71
Inlet Thalweg 1 222.50 0.0 90.71
Inlet Rustline Height 1 222.50 0.0 91.27
U/S Thalweg 1 223.50 1.0 90.69
U/S Water Surface Elev 1 227.50 5.0 91.17
U/S Thalweg 1 227.50 5.0 90.48
U/S OHW elevation 1 227.50 5.0 91.52
U/S Thalweg 1 237.70 15.2 90.52
U/S Water Surface Elev 272.50 50.0 91.17
U/S Headwater 272.50 50.0 91.29
U/S Thalweg (in a pool) 272.50 50.0 89.40
U/S Thalweg 325.50 103.0 89.96
U/S Water Surface Elev 325.50 103.0 92.17
U/S Headwater 325.50 103.0 92.29

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): 1.2
 
Gear Type: Minnow Trap (B) Trap Duration(h): 0.55

Fish Observations

Species: juvenile Dolly Varden Life History: Resident
Total Fish Observed: 7 Fish Measured: 3 Fork Lengths (mm) Min: 74 Max: 125 Mean: 101
Collected/Observed by Gear Type: Downstream Minnow Trap (5)  Upstream Minnow Trap (2)  
 
Species: juvenile Chinook salmon Life History: Anadromous
Total Fish Observed: 4 Fish Measured: 2 Fork Lengths (mm) Min: 54 Max: 55 Mean: 54
Collected/Observed by Gear Type: Downstream Minnow Trap (4)  
 
Species: juvenile coho salmon Life History: Anadromous
Total Fish Observed: 75 Fish Measured: 16 Fork Lengths (mm) Min: 43 Max: 68 Mean: 56
Collected/Observed by Gear Type: Downstream Minnow Trap (63)  Upstream Minnow Trap (12)  

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