Fish Passage Site 20100765

Coordinates (dec. deg.): 62.71638°, -144.24256°
Legal Description: C011N006E23
Region: South Central
Road Name: Tok Cut-Off

Datum: NAD83
Quad Name / ITM: Gulkana C-1
AWC Stream #:
Stream Name: Copper River Tributary, Unnamed


Site Comments: MP 51.5

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: Gray

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:

Site Observations:

  1. Inlet perch

Comments: Assessment conducted by Copper River Watershed Project. Large amount of road fill, did not survey up and over. Upstream and downstream longitudinal profiles are not connected by a common benchmark and should only be used to assess featured above and below the culvert exclusive of each other.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Structural steel plate) Fish Passage Rating: Gray
Length(ft): 238.6
Inlet Type: Mitered
Outlet Type: Mitered
Corrugation Depth(in.): 2.0
Corrugation Width(in.): 6.0
Condition Rating(1-5): 4
Approach Angle: 10.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
Width(ft):9.02 9.02
Height(ft):9.47 11.04
Apron Length(ft):
Water Depth(ft): 0.85
Rustline Height(ft):1.1
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 2.65
Culvert Gradient:
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Inlet perch

Stream Measurements

Stream SubstratesUpstreamDownstream
Stream Slope(deg.):0.5
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)
Width (ft)
Downstream ordinary high water 9.20
Downstream ordinary high water 5.60
Downstream ordinary high water 8.80
Upstream ordinary high water 3.10
Upstream ordinary high water 4.40
Upstream ordinary high water 2.60


Locator ID Culvert
Distance (ft)1
Distance From
Crossing (ft)2
Elevation (ft)
D/S Grade Ctrl (Thalweg) 0.00 95.12
D/S Water Surface Elev 0.00 96.02
D/S Grade Ctrl (Thalweg) 39.00 96.49
D/S Water Surface Elev 39.00 97.49
D/S Tailcrest or 1st Thalweg 74.00 98.36
D/S Water Surface Elev 74.00 99.11
Max Pool Depth 79.00 98.31
Outlet Pool Water Elev 79.00 99.15
Outlet Invert (Downstream survey not related to upstream section!!) 83.40 98.40
Outlet Culvert Top 83.40 109.44
D/S Water Surface Elev 83.40 99.25
Inlet Culvert Invert 322.00 96.12
U/S Water Surface Elev 322.00 96.96
Inlet Culvert Top 322.00 105.59
U/S Grade Ctrl (Thalweg) 336.00 96.53
U/S Water Surface Elev 336.00 97.38
U/S Grade Ctrl (Thalweg) 363.00 96.54
U/S Water Surface Elev 363.00 97.53
U/S Grade Ctrl (Thalweg) (Upstream survey not related to downstream survey!) 398.00 95.85
U/S Water Surface Elev 398.00 97.57


  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 (A) Trap Duration(h): 18.0
Comments: 2 traps set upstream, no fish caught or observed.
Gear Type: Minnow Trap (B) Trap Duration(h): 18.0
Comments: 2 traps set downstream. No fish caught or observed.

Fish Observations

No fish observations occurred during this survey.

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