Fish Passage Site 20601538

Coordinates (dec. deg.): 61.08064°, -151.17912°
Legal Description: S012N011W35
Region: South Central
Road Name: Logging Road

Datum: NAD83
Quad Name / ITM: Tyonek A-4
AWC Stream #:
Stream Name: Unnamed

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 TYCS1-TY012

Observers: Cecil Rich, Michael Anderson, Joe Buckwalter

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools:
Construction Year:


Comments: Datum = WGS84. GPS error 17.4

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated Metal) Fish Passage Rating:
 
Length(ft): 50.4
Inlet Type: Projecting
Outlet Type:
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.625
Condition Rating(1-5):
Approach Angle:
Sedimentation At Inlet:
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):3.9 3.9
Height(ft):3.7 3.99
Apron Length(ft):
Water Depth(ft):1.26 2.58
Rustline Height(ft):
Substrate Depth(ft):0.0 0.0
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height: 0.05
Outfall Type:
Constriction Ratio: 0.31
Culvert Gradient: 2.64%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Mechanical damage or joints parting

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:Silt/ClaySilt/Clay
Subdominant:NoneGravel
Stream Slope(deg.):
Stream Flow Stage:
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 72.0 5.50
Downstream ordinary high water 123.0 11.00
Upstream ordinary high water 5.0 85.00
Upstream ordinary high water 95.0 12.10
Upstream ordinary high water 140.0 13.30

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Tailcrest or 1st Thalweg 93.21
D/S OHW Elev 0.00 123.0 92.85
D/S Thalweg 0.00 123.0 92.20
D/S Water Surface Elev 0.00 123.0 92.60
D/S Water Surface Elev 51.00 72.0 93.94
D/S OHW Elev 51.00 72.0 94.22
D/S Thalweg 51.00 72.0 93.37
D/S Thalweg 117.60 5.4 91.39
Max Pool Depth 118.00 5.0 91.58
OHW Left Bank 122.00 1.0 94.80
OHW Left Bank 122.00 1.0 95.04
Outlet Culvert Top 1 123.00 0.0 96.26
Outlet Rustline Height 1 123.00 0.0 95.02
Outlet Thalweg 1 123.00 0.0 92.09
Outlet Invert 1 123.00 0.0 92.27
Road Elev 148.00 100.83
Road Elev 148.00 101.32
Inlet Culvert Top (top mangled, apex) 1 173.00 0.0 97.30
Inlet Rustline Height 1 173.00 0.0 95.02
Inlet Culvert Invert 1 173.00 0.0 93.60
Inlet Thalweg 1 173.00 0.0 93.23
U/S Thalweg 1 174.00 1.0 92.79
U/S OHW elevation 1 174.00 1.0 95.30
U/S Water Surface Elev 1 178.00 5.0 94.80
U/S Thalweg 1 178.00 5.0 92.55
U/S Thalweg 1 181.00 8.0 92.26
U/S Thalweg 268.00 95.0 92.27
U/S Headwater 268.00 95.0 94.82
U/S Water Surface Elev 268.00 95.0 94.82
U/S Thalweg 313.00 140.0 92.85
U/S Headwater 313.00 140.0 94.76
U/S Water Surface Elev 313.00 140.0 94.76

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, 1/4 in. Mesh (A) Trap Duration(h): 2
 
Gear Type: Minnow Trap, 1/4 in. Mesh (B) Trap Duration(h): 2

Fish Observations

Species: juvenile Dolly Varden Life History: Unknown
Total Fish Observed: 6 Fish Measured: 3 Fork Lengths (mm) Min: 83 Max: 135 Mean: 112
Collected/Observed by Gear Type: Downstream Minnow Trap, 1/4 in. Mesh (4)  Upstream Minnow Trap, 1/4 in. Mesh (2)  
 
Species: juvenile coho salmon Life History: Anadromous
Total Fish Observed: 65 Fish Measured: 20 Fork Lengths (mm) Min: 69 Max: 106 Mean: 90
Collected/Observed by Gear Type: Downstream Minnow Trap, 1/4 in. Mesh (20)  Upstream Minnow Trap, 1/4 in. Mesh (45)  
 
Species: juvenile rainbow trout Life History: Unknown
Total Fish Observed: 2 Fish Measured: 1 Fork Lengths (mm) Min: 115 Max: 115 Mean: 115
Collected/Observed by Gear Type: Downstream Minnow Trap, 1/4 in. Mesh (2)  

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