Fish Passage Site 20100773

Coordinates (dec. deg.): 62.46309°, -144.86108°
Legal Description: C008N003E21
Region: South Central
Road Name: Tok Cut-Off

Datum: NAD83
Quad Name / ITM: Gulkana B-2
AWC Stream #:
Stream Name: Unnamed


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.


Project Supervisor: Gillian O'Doherty, ADFG
Observers: Kirsti Jurica

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:

Comments: Survey and Photos CRWP. Upstream channel sprawls into wetland area about 100 feet upstream from crossing

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
Length(ft): 115.5
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.75
Condition Rating(1-5): 3
Approach Angle: 10.0
Sedimentation At Inlet: Yes
Inlet Substrate: Gravel
Outlet Substrate: Gravel
Width(ft):4.75 4.85
Height(ft):3.62 3.39
Apron Length(ft):
Water Depth(ft): 0.85
Rustline Height(ft):
Substrate Depth(ft):0.8 0.5
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 2.03
Culvert Gradient: -0.29%
Max Slope:
Max Slope Length:

Comments: Culvert appears to have been repaired but not replaced since 2002 survey. Uneven substrate at outlet.

Stream Measurements

Stream SubstratesUpstreamDownstream
Stream Slope(deg.):2
Stream Flow Stage:
Stream Width Type Distance From
Crossing (ft)
Width (ft)
Downstream ordinary high water 2.50
Downstream ordinary high water 1.80
Downstream ordinary high water 2.70


Locator ID Culvert
Distance (ft)1
Distance From
Crossing (ft)2
Elevation (ft)
Road Elev 100.00
D/S Grade Ctrl (Thalweg) 0.00 84.01
D/S Water Surface Elev 0.00 84.58
D/S Grade Ctrl (Thalweg) 30.00 84.86
D/S Water Surface Elev 30.00 85.36
Outlet Culvert Top 34.00 88.44
Outlet Invert (Invert on left side, uneven sediment) 34.00 85.05
Outlet Invert (Invert on right side, uneven sediment) 34.00 84.51
D/S Water Surface Elev 34.00 85.36
Inlet Culvert Invert 149.50 84.49
U/S Water Surface Elev 149.50 85.81
Inlet Culvert Top 149.50 88.11
U/S Grade Ctrl (Thalweg) 163.50 85.54
U/S Water Surface Elev 163.50 85.90
U/S Grade Ctrl (Thalweg) 181.50 83.66
U/S Water Surface Elev 181.50 85.85
U/S Grade Ctrl (Thalweg) 249.50 85.31
U/S Water Surface Elev 249.50 86.01


  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: Visual Observation, Ground (A)
Comments: Sticklebacks visually observed at site

Fish Observations

Species: stickleback-unspecified Life History:
Total Fish Observed: 10 Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: At Site Visual Observation, Ground (10)  
Comments: Sticklebacks visually observed at site

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