Fish Passage Site 20601546

Coordinates (dec. deg.): 61.10692°, -151.72321°
Legal Description: S012N014W26
Region: South Central
Road Name:

Datum: NAD83
Quad Name / ITM: Tyonek A-5
AWC Stream #:
Stream Name: Chuitkilnachna Creek

Elevation:

Site Comments: None

Survey Date: Jun 17, 2002

Survey TYCS1-TY020

Observers: Cecil Rich, Michael Anderson, Joe Buckwalter

Overall Fish Passage Rating: Gray

Tidal: No
Backwatered: No

Step Pools:
Construction Year:


Comments: Datum = WGS84. GPS accuracy = 24.4 feet. Left culvert was completely plugged and right culvert partially plugged (by beavers). Both culverts were cleared approximately 2 hours prior to survey. Right culvert bearing = 164 degrees.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated Metal) Fish Passage Rating:
 
Length(ft): 40.0
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):3.95 4.0
Height(ft):4.15 4.13
Apron Length(ft):
Water Depth(ft):1.3 0.82
Rustline Height(ft):
Substrate Depth(ft):0.0 0.0
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height: 0.1
Outfall Type:
Constriction Ratio: 0.19
Culvert Gradient: -0.90%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Beaver Activity
ID: 2 Structure Type: Circular pipe (Corrugated Metal) Fish Passage Rating:
 
Length(ft): 40.0
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):3.94 4.0
Height(ft):4.1 4.04
Apron Length(ft):
Water Depth(ft):0.75 0.68
Rustline Height(ft):
Substrate Depth(ft):0.0 0.0
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height: 0.1
Outfall Type:
Constriction Ratio: 0.19
Culvert Gradient: 0.28%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Beaver Activity

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 125.0 47.40
Downstream ordinary high water 224.0 48.00
Downstream ordinary high water 308.0 30.00
Upstream ordinary high water 5.0 42.50
Upstream ordinary high water 252.0 51.00
Upstream ordinary high water 394.0 32.50

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Tailcrest or 1st Thalweg 88.88
D/S OHW Elev 0.00 308.0 87.90
D/S Thalweg 0.00 308.0 87.08
D/S Water Surface Elev 0.00 308.0 87.63
D/S Thalweg 84.00 224.0 87.40
D/S Water Surface Elev 84.00 224.0 87.90
D/S OHW Elev 84.00 224.0 88.30
D/S Thalweg 296.00 12.0 83.89
Max Pool Depth 1 303.00 5.0 85.41
Max Pool Depth 2 303.00 5.0 85.75
Outlet Invert 1 308.00 0.0 87.67
Outlet Thalweg 1 308.00 0.0 87.20
Outlet Thalweg 2 308.00 0.0 87.29
OHW Left Bank 308.00 0.0 88.33
Outlet Invert 2 308.00 0.0 87.75
OHW Left Bank 308.00 0.0 88.68
Outlet Rustline Height (lowest of 3) 2 308.00 0.0 88.97
Outlet Rustline Height (lowest of 3 rustlines) 1 308.00 0.0 89.37
Outlet Culvert Top 2 308.00 0.0 91.79
Outlet Culvert Top 1 308.00 0.0 91.80
Road Elev 328.00 94.98
Road Elev 328.00 95.03
Inlet Rustline Height 2 348.00 0.0 89.23
Inlet Culvert Top 2 348.00 0.0 91.96
Inlet Culvert Top 1 348.00 0.0 91.46
U/S OHW elevation 2 348.00 0.0 88.93
U/S Water Surface Elev 1 348.00 0.0 88.68
Inlet Thalweg 2 348.00 0.0 87.78
Inlet Culvert Invert 2 348.00 0.0 87.86
U/S Water Surface Elev 2 348.00 0.0 88.67
Inlet Culvert Invert 1 348.00 0.0 87.31
Inlet Thalweg 1 348.00 0.0 87.36
U/S Thalweg 2 349.00 1.0 87.72
U/S Thalweg 1 349.00 1.0 87.40
U/S OHW elevation 1 349.00 1.0 89.02
U/S Thalweg 1 353.00 5.0 87.13
U/S Thalweg 2 353.00 5.0 86.88
U/S Thalweg 1 355.90 7.9 86.38
U/S Thalweg 2 356.00 8.0 86.46
U/S Thalweg 600.00 252.0 86.39
U/S Headwater 600.00 252.0 89.06
U/S Water Surface Elev 600.00 252.0 88.84

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): 3
 
Gear Type: Minnow Trap, 1/4 in. Mesh (B) Trap Duration(h): 2.75

Fish Observations

Species: ninespine stickleback Life History: Resident
Total Fish Observed: 2 Fish Measured: 1 Fork Lengths (mm) Min: 61 Max: 61 Mean: 61
Collected/Observed by Gear Type: Downstream Minnow Trap, 1/4 in. Mesh (2)  
 
Species: threespine stickleback Life History: Resident
Total Fish Observed: 6 Fish Measured: 3 Fork Lengths (mm) Min: 50 Max: 59 Mean: 55
Collected/Observed by Gear Type: Downstream Minnow Trap, 1/4 in. Mesh (6)  
 
Species: juvenile coho salmon Life History: Anadromous
Total Fish Observed: 16 Fish Measured: 8 Fork Lengths (mm) Min: 108 Max: 119 Mean: 113
Collected/Observed by Gear Type: Downstream Minnow Trap, 1/4 in. Mesh (8)  Upstream Minnow Trap, 1/4 in. Mesh (8)  
 
Species: sculpin-unspecified Life History: Resident
Total Fish Observed: 4 Fish Measured: 2 Fork Lengths (mm) Min: 70 Max: 72 Mean: 71
Collected/Observed by Gear Type: Downstream Minnow Trap, 1/4 in. Mesh (4)  

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