Fish Passage Site 20601554

Coordinates (dec. deg.): 61.04769°, -151.43751°
Legal Description: S011N012W17
Region: South Central
Road Name: Tyonek Road

Datum: NAD83
Quad Name / ITM: Tyonek A-4
AWC Stream #: 247-20-10050-2025
Stream Name: Congabuna Lake outlet

Elevation:

Site Comments: Shirleyville - Tyonek Rd

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-TY028

Observers: Cecil Rich, Michael Anderson, Joe Buckwalter

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools:
Construction Year:


Comments: Datum = WGS84. GPS accuracy 31.8 Site scheduled to be replaced in 2017.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated Metal) Fish Passage Rating:
 
Length(ft): 61.15
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: None
Outlet Substrate: None
InletOutlet
Width(ft):4.0 4.0
Height(ft): 4.03
Apron Length(ft):
Water Depth(ft):0.75 0.58
Rustline Height(ft):
Substrate Depth(ft):0.0 0.0
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height: 0.05
Outfall Type:
Constriction Ratio: 0.34
Culvert Gradient: 0.34%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. None of this type

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelCobble
Subdominant:GravelBoulder
Stream Slope(deg.):
Stream Flow Stage:
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 28.5 10.50
Downstream ordinary high water 65.0 12.50
Downstream ordinary high water 122.0 14.00
Upstream ordinary high water 5.0 16.00
Upstream ordinary high water 49.0 12.00
Upstream ordinary high water 96.5 11.30

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Tailcrest or 1st Thalweg 95.06
D/S Thalweg 0.00 122.0 94.09
D/S Water Surface Elev 0.00 122.0 94.57
D/S OHW Elev 0.00 122.0 94.96
D/S Thalweg 57.00 65.0 95.12
D/S Water Surface Elev 57.00 65.0 95.58
D/S OHW Elev 57.00 65.0 95.90
D/S Thalweg 112.20 9.8 93.64
Max Pool Depth 1 117.00 5.0 93.99
OHW Left Bank 119.00 3.0 96.08
OHW Left Bank 119.00 3.0 96.47
Outlet Rustline Height 1 122.00 0.0 96.80
Outlet Culvert Top 1 122.00 0.0 99.58
Outlet Invert 1 122.00 0.0 95.55
Outlet Thalweg 1 122.00 0.0 94.98
Road Elev 152.50 105.10
Road Elev 152.50 105.19
Inlet Culvert Top 1 183.00 0.0 99.77
Inlet Rustline Height 1 183.00 0.0 96.83
Inlet Thalweg 1 183.00 0.0 95.74
Inlet Culvert Invert 1 183.00 0.0 95.76
U/S Thalweg 1 184.00 1.0 96.17
U/S OHW elevation 1 184.00 1.0 97.57
U/S Water Surface Elev 1 188.00 5.0 96.88
U/S Thalweg 1 188.00 5.0 95.71
U/S Thalweg 1 191.00 8.0 96.23
U/S Thalweg 232.00 49.0 97.11
U/S Water Surface Elev 232.00 49.0 97.83
U/S Headwater 232.00 49.0 98.26
U/S Water Surface Elev 279.50 96.5 98.29
U/S Headwater 279.50 96.5 98.56
U/S Thalweg 279.50 96.5 97.93

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
 
Gear Type: Visual Observation, Ground (D)
Comments: in outlet pool

Fish Observations

Species: carcass eulachon Life History: Anadromous
Total Fish Observed: Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: Downstream Visual Observation, Ground ()  
 
Species: juvenile coho salmon Life History: Anadromous
Total Fish Observed: 8 Fish Measured: 4 Fork Lengths (mm) Min: 81 Max: 114 Mean: 94
Collected/Observed by Gear Type: Downstream Minnow Trap, 1/4 in. Mesh (8)  
 
Species: juvenile rainbow trout Life History: Resident
Total Fish Observed: 4 Fish Measured: 2 Fork Lengths (mm) Min: 113 Max: 116 Mean: 114
Collected/Observed by Gear Type: Downstream Minnow Trap, 1/4 in. Mesh (4)  
 
Species: no fish collected or observed Life History: Not Applicable
Total Fish Observed: 0 Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: Upstream Minnow Trap, 1/4 in. Mesh (0)  

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