Fish Passage Site 20100774

Coordinates (dec. deg.): 62.43242°, -144.95736°
Legal Description: C008N002E36
Region: South Central
Road Name: Tok Cut-Off

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

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 UPDATE-TOK07

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. Outfall height gray
  2. Culvert gradient gray
  3. Beaver Activity
  4. Inlet perch

Comments: This assessment was conducted by the Copper River Watershed Project.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Structural steel plate) Fish Passage Rating: Gray
 
Length(ft): 110.8
Inlet Type: Mitered
Outlet Type: Mitered
Corrugation Depth(in.): 2.0
Corrugation Width(in.): 6.5
Condition Rating(1-5): 3
Approach Angle: 25.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):7.75 8.02
Height(ft):7.35 8.19
Apron Length(ft):
Water Depth(ft): 0.5
Rustline Height(ft):1.4
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.27
Outfall Type: Cascade Over Rip-Rap
Constriction Ratio: 1.43
Culvert Gradient: 0.69%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Outfall height gray
  2. Beaver Activity
  3. Inlet perch
ID: 2 Structure Type: Circular pipe (Structural steel plate) Fish Passage Rating: Gray
 
Length(ft): 110.8
Inlet Type: Mitered
Outlet Type: Mitered
Corrugation Depth(in.): 2.0
Corrugation Width(in.): 6.5
Condition Rating(1-5): 3
Approach Angle: 25.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):7.92 8.02
Height(ft):7.38 8.45
Apron Length(ft):
Water Depth(ft): 0.85
Rustline Height(ft):1.53
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: 1.43
Culvert Gradient: 1.07%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient gray
  2. Outfall height gray
  3. Beaver Activity
  4. Inlet perch

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:CobbleCobble
Subdominant:GravelGravel
Stream Slope(deg.):0.5
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)
Stream
Width (ft)
Downstream ordinary high water 8.10
Downstream ordinary high water 9.20
Downstream ordinary high water 7.20
Upstream ordinary high water 6.90
Upstream ordinary high water 8.40
Upstream ordinary high water 7.80

Elevations

Locator ID Culvert
Number
River
Distance (ft)1
Distance From
Crossing (ft)2
Relative
Elevation (ft)
Inlet Culvert Top 1 100.11
Inlet Culvert Top 2 100.21
Road Elev 109.76
Outlet Culvert Top 1 100.18
Outlet Culvert Top 2 100.09
D/S Grade Ctrl (Thalweg) 0.00 90.02
D/S Water Surface Elev 0.00 90.82
D/S Thalweg (top of gravel bar, at end of pool) 38.00 90.66
D/S Water Surface Elev 38.00 91.02
Max Pool Depth 1 48.00 88.95
Outlet Pool Water Elev 1 48.00 91.00
Max Pool Depth 2 48.00 88.51
Outlet Pool Water Elev 2 48.00 91.03
D/S Thalweg (outlet riffle) 2 67.00 91.36
D/S Water Surface Elev 2 67.00 92.46
D/S Thalweg (outlet riffle) 2 69.00 91.17
D/S Water Surface Elev 2 69.00 92.22
Outlet Invert 1 73.00 91.99
D/S Water Surface Elev 1 73.00 92.49
Outlet Invert 2 73.00 91.64
D/S Water Surface Elev 2 73.00 92.49
Inlet Culvert Invert 1 183.80 92.76
U/S Water Surface Elev 1 183.80 93.71
Inlet Culvert Invert 2 183.80 92.83
U/S Water Surface Elev 2 183.80 93.68
U/S Grade Ctrl (Thalweg) 1 195.80 93.70
U/S Water Surface Elev 1 195.80 94.16
U/S Grade Ctrl (Thalweg) 2 195.80 93.51
U/S Water Surface Elev 2 195.80 94.26
U/S Grade Ctrl (Thalweg) 224.80 91.24
U/S Water Surface Elev 224.80 94.29
U/S Grade Ctrl (Thalweg) 256.80 90.69
U/S Water Surface Elev 256.80 94.35
U/S Grade Ctrl (Thalweg) 268.80 93.20
U/S Water Surface Elev 268.80 94.35
U/S Grade Ctrl (Thalweg) 283.80 91.43
U/S Water Surface Elev 283.80 94.37

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 (A) Trap Duration(h): 18.0
Comments: 2 traps set upstream.
 
Gear Type: Minnow Trap (B) Trap Duration(h): 18.0
Comments: 2 Traps set downstream, no fish caught.
 
Gear Type: Visual Observation, Ground (C)

Fish Observations

Species: Dolly Varden Life History:
Total Fish Observed: 1 Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: At Site Visual Observation, Ground (1)  
 
Species: Arctic grayling Life History:
Total Fish Observed: 2 Fish Measured: 2 Fork Lengths (mm) Min: 80 Max: 90 Mean: 85
Collected/Observed by Gear Type: Upstream Minnow Trap (2)  

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