Fish Passage Site 20601536

Coordinates (dec. deg.): 61.12846°, -151.22820°
Legal Description: S012N011W16
Region: South Central
Road Name: Pan Am Road

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

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-TY010

Observers: Cecil Rich, Michael Anderson, Joe Buckwalter

Overall Fish Passage Rating: Gray

Tidal: No
Backwatered: No

Step Pools:
Construction Year:


Comments: Datum = WGS84. bearing of culvert A is 139.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated Metal) Fish Passage Rating:
 
Length(ft): 30.13
Inlet Type: Projecting
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):2.0 2.0
Height(ft):2.04 1.97
Apron Length(ft):
Water Depth(ft):0.4 0.5
Rustline Height(ft):
Substrate Depth(ft):0.0 0.0
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height:
Outfall Type:
Constriction Ratio: 0.48
Culvert Gradient: 0.46%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Road Fill (pushed off road by grader)
ID: 2 Structure Type: Circular pipe (Corrugated Metal) Fish Passage Rating:
 
Length(ft): 24.14
Inlet Type: Projecting
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):3.0 3.0
Height(ft):3.02 3.03
Apron Length(ft):
Water Depth(ft):0.4 0.5
Rustline Height(ft):
Substrate Depth(ft):0.0 0.0
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height:
Outfall Type:
Constriction Ratio: 0.48
Culvert Gradient: 0.37%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Road Fill (pushed off road by grader)

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:SandGravel
Subdominant:Silt/ClayGravel
Stream Slope(deg.):
Stream Flow Stage:
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 12.0 15.50
Downstream ordinary high water 47.0 7.80
Downstream ordinary high water 118.0 10.00
Upstream ordinary high water 5.0 14.60
Upstream ordinary high water 82.0 11.40
Upstream ordinary high water 112.0 9.60

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Thalweg 0.00 118.0 90.33
D/S Water Surface Elev 0.00 118.0 90.48
D/S OHW Elev 0.00 118.0 90.77
D/S Thalweg 71.00 47.0 91.13
D/S Water Surface Elev 71.00 47.0 91.58
D/S OHW Elev 71.00 47.0 92.19
OHW Left Bank 113.00 5.0 92.56
Max Pool Depth 113.50 4.5 90.24
D/S Thalweg 113.50 4.5 90.24
D/S Tailcrest or 1st Thalweg 113.70 4.3 91.67
Outlet Culvert Top 1 118.00 0.0 93.62
Outlet Culvert Top 2 118.00 0.0 94.68
Outlet Thalweg 2 118.00 0.0 91.45
Outlet Thalweg 1 118.00 0.0 91.33
Outlet Invert 1 118.00 0.0 91.65
Outlet Invert 2 118.00 0.0 91.65
Road Elev 131.50 95.32
Road Elev 131.50 95.34
Inlet Culvert Top 2 145.00 0.0 94.76
Inlet Culvert Top 1 145.00 0.0 93.83
Inlet Culvert Invert 2 145.00 0.0 91.74
Inlet Culvert Invert 1 145.00 0.0 91.79
U/S Thalweg 1 146.00 1.0 91.89
U/S Thalweg 2 146.00 1.0 91.98
U/S Thalweg 1 149.00 4.0 91.62
U/S Thalweg 2 150.00 5.0 91.58
U/S Thalweg 1 150.00 5.0 91.69
U/S Headwater 150.00 5.0 92.91
U/S Water Surface Elev 150.00 5.0 92.24
U/S Thalweg 2 151.00 6.0 91.52
U/S Water Surface Elev 227.00 82.0 92.30
U/S Headwater 227.00 82.0 93.40
U/S Thalweg 227.00 82.0 91.71
U/S Headwater 257.00 112.0 93.50
U/S Water Surface Elev 257.00 112.0 92.30
U/S Thalweg 257.00 112.0 91.35

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): 3.0
 
Gear Type: Minnow Trap, 1/4 in. Mesh (B) Trap Duration(h): 3.0

Fish Observations

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: Downstream Minnow Trap, 1/4 in. Mesh (0)  Upstream Minnow Trap, 1/4 in. Mesh (0)  

Questions or comments about this report can be directed to dfg.dsf.webmaster@alaska.gov