Fish Passage Site 20100772

Coordinates (dec. deg.): 62.54926°, -144.76309°
Legal Description: C009N003E24
Region: South Central
Road Name: Tok Cut-Off

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

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-TOK05

Project Supervisor: Gillian O'Doherty, ADFG
Observers: Andrew Kastning

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: Yes

Step Pools: No
Construction Year:


Site Observations:

  1. Beaver Activity

Comments: This assessment was conducted by the Copper River Watershed Project. Flooded area due to beaver activity, Culvert inlets submerged. Ongoing road work has added an overflow pipe in this area to increase drainage.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 127.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.75
Condition Rating(1-5): 3
Approach Angle: 0.0
Sedimentation At Inlet:
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft): 4.1
Height(ft):3.99 4.09
Apron Length(ft):
Water Depth(ft):
Rustline Height(ft):
Substrate Depth(ft):0.0 0.0
Backwatered?: Yes
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.55
Culvert Gradient: 0.60%
Max Slope:
Max Slope Length:
 

Comments: Constriction and upstream measurments taken from 2009 CRWP site visit.
  Culvert Observations:
  1. Beaver Activity
ID: 2 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 127.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.75
Condition Rating(1-5): 3
Approach Angle: 0.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft): 4.05
Height(ft):4.11 4.0
Apron Length(ft):
Water Depth(ft):
Rustline Height(ft):
Substrate Depth(ft):0.0 0.0
Backwatered?: Yes
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.55
Culvert Gradient: 0.40%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Beaver Activity

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:OrganicOrganic
Subdominant:GravelGravel
Stream Slope(deg.):
Stream Flow Stage:High

No stream width data available.

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 101.41
Max Pool Depth 0.00 86.42
Outlet Pool Water Elev 0.00 89.24
D/S Water Surface Elev 1 8.00 89.26
D/S Water Surface Elev 2 8.00 89.28
Outlet Culvert Top 2 8.00 90.57
Outlet Culvert Top 1 8.00 90.63
Outlet Invert 1 8.00 86.54
Outlet Invert 2 8.00 86.57
Inlet Culvert Invert (inlet submerged) 2 135.00 87.00
Inlet Culvert Invert (inlet submerged) 1 135.00 87.33
Inlet Culvert Top 2 135.00 91.11
Inlet Culvert Top 1 135.00 91.32
U/S Water Surface Elev 1 135.00 93.55
U/S Water Surface Elev 2 135.00 93.56

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: Visual Observation, Ground (A)
Comments: Adult arctic grayling observed at site.
 
Gear Type: Minnow Trap (B) Trap Duration(h): 19.0
Comments: 3 traps set upstream. No fish caught
 
Gear Type: Minnow Trap (C) Trap Duration(h): 19.0
Comments: 3 traps set downstream

Fish Observations

Species: adult Arctic grayling Life History: Unknown
Total Fish Observed: 1 Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: At Site Visual Observation, Ground (1)  
Comments: Adult grayling observed at site.
 
Species: Arctic grayling Life History: Unknown
Total Fish Observed: 4 Fish Measured: 4 Fork Lengths (mm) Min: 75 Max: 92 Mean: 82
Collected/Observed by Gear Type: Downstream Minnow Trap (4)  

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