Fish Passage Site 20100775

Coordinates (dec. deg.): 62.40978°, -145.02932°
Legal Description: C007N002E03
Region: South Central
Road Name: Tok Cut-Off

Datum: NAD83
Quad Name / ITM: Gulkana B-3
AWC Stream #:
Stream Name: Unnamed

Elevation:

Site Comments: MP 15.5

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.

Survey UPDATE-TOK08

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

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert gradient red
  2. Constriction ratio gray
  3. Culvert is poorly aligned
  4. Inlet perch

Comments: This assessment was conducted by the Copper River Watershed Project. Upstream stream gradient 1.5%, downstream 3%.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 80.7
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.75
Condition Rating(1-5): 3
Approach Angle: 65.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):2.95 3.0
Height(ft):3.05 3.03
Apron Length(ft):
Water Depth(ft): 0.3
Rustline Height(ft):0.5
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: 0.74
Culvert Gradient: 2.04%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient red
  2. Culvert is poorly aligned
  3. Inlet perch
  4. Constriction ratio gray
ID: 2 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 80.5
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.75
Condition Rating(1-5): 3
Approach Angle: 65.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):3.05 3.03
Height(ft):2.99 2.96
Apron Length(ft):
Water Depth(ft): 0.25
Rustline Height(ft):0.4
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: 0.74
Culvert Gradient: 1.99%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient red
  2. Constriction ratio gray
  3. Culvert is poorly aligned
  4. Inlet perch

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:Silt/ClaySilt/Clay
Subdominant:GravelGravel
Stream Slope(deg.):1.5
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)
Stream
Width (ft)
Downstream ordinary high water 9.80
Downstream ordinary high water 11.00
Downstream ordinary high water 12.30
Upstream ordinary high water 4.20
Upstream ordinary high water 5.50
Upstream ordinary high water 7.50

Elevations

Locator ID Culvert
Number
River
Distance (ft)1
Distance From
Crossing (ft)2
Relative
Elevation (ft)
Road Elev 105.04
D/S Grade Ctrl (Thalweg) 0.00 87.73
D/S Water Surface Elev 0.00 89.95
D/S Grade Ctrl (Thalweg) 37.00 89.05
D/S Water Surface Elev 37.00 90.35
D/S Grade Ctrl (Thalweg) 42.00 90.36
D/S Water Surface Elev 42.00 90.96
D/S Tailcrest or 1st Thalweg 48.00 91.56
D/S Water Surface Elev 48.00 92.17
Max Pool Depth 59.00 91.16
Outlet Pool Water Elev 59.00 92.20
Outlet Culvert Top 1 63.00 94.95
Outlet Culvert Top 2 63.00 94.90
Outlet Invert 1 63.00 91.92
D/S Water Surface Elev 1 63.00 92.22
Outlet Invert 2 63.00 91.94
D/S Water Surface Elev 2 63.00 92.20
Inlet Culvert Invert 1 143.00 93.57
U/S Water Surface Elev 1 143.00 94.07
Inlet Culvert Invert 2 143.00 93.54
U/S Water Surface Elev 2 143.00 94.04
Inlet Culvert Top 1 143.00 96.62
Inlet Culvert Top 2 143.00 96.53
U/S Grade Ctrl (Thalweg) 154.00 91.96
U/S Water Surface Elev 154.00 94.16
U/S Grade Ctrl (Thalweg) 162.00 93.56
U/S Water Surface Elev 162.00 94.44
U/S Grade Ctrl (Thalweg) 175.00 93.91
U/S Water Surface Elev 175.00 95.22
U/S Grade Ctrl (Thalweg) 214.00 94.39
U/S Water Surface Elev 214.00 95.40
U/S Grade Ctrl (Thalweg) 246.00 94.41
U/S Water Surface Elev 246.00 95.56

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

Fish Observations

Species: Dolly Varden Life History:
Total Fish Observed: 1 Fish Measured: 1 Fork Lengths (mm) Min: 95 Max: 95 Mean: 95
Collected/Observed by Gear Type: Downstream Minnow Trap (1)  Upstream Minnow Trap ()  
Comments: Dolly Varden caught upstream of crossing.

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