Fish Passage Site 40501769

Coordinates (dec. deg.): 65.28932°, -146.54779°
Legal Description: F005N006E05
Region: Interior
Road Name: Steese Highway

Datum: WGS84
Quad Name / ITM: Circle B-6
AWC Stream #:
Stream Name: Caribou Creek

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 EDS10-STS20

Observers: Ben Histand, Justin Leon

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert gradient red
  2. Inlet perch
  3. Structural Problem
  4. Compound gradient in pipe

Comments: The inlet of this pipe is bent up. The miter on the inlet extends 6.5 feet from the top of the pipe. There is a compound gradient in the pipe. This is because the miter at the inlet is bent up. An adult arctic grayling was seen swimming downstream through the pipe during this survey.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 195.4
Inlet Type: Mitered
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.5
Condition Rating(1-5): 2
Approach Angle: 11.0
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):5.7 5.5
Height(ft):6.4 6.5
Apron Length(ft):
Water Depth(ft): 1.28
Rustline Height(ft):1.7
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: 0.79
Culvert Gradient: 2.58%
Max Slope: 17.5
Max Slope Length: 6.4
  Culvert Observations:
  1. Culvert gradient red
  2. Inlet perch
  3. Structural Problem
  4. Compound gradient in pipe

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:CobbleCobble
Subdominant:GravelGravel
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 49.0 6.30
Upstream ordinary high water 79.0 8.10
Upstream ordinary high water 146.0 6.60

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev (Road Surface) 100.14
D/S Tailcrest or 1st Thalweg (Tailcrest of Outlet Pool - Backs Up Water Partway Up Pipe) 0.00 62.74
D/S Water Surface Elev (Water Surface) 0.00 63.56
D/S Thalweg (Bottom of Outlet Pool) 19.00 61.79
D/S Water Surface Elev (Outside of Pipe) 36.00 63.60
D/S Water Surface Elev (Glide - Water Surface) 38.00 63.60
Outlet Invert (Bottom of Pipe) 38.00 62.32
Outlet Culvert Top (Top of Pipe) 38.00 68.89
Inlet Culvert Top (Top of Pipe) 226.90 72.56
U/S Thalweg (Bottom of Pipe - Below Top of Miter - Miter is Bent Up Steeply) 227.00 66.25
U/S Thalweg (Water Surface) 227.00 66.52
Inlet Culvert Invert (Bottom of Pipe) 233.40 67.37
U/S Water Surface Elev (Water Surface) 233.40 67.87
U/S Headwater (Water Surface Outside of Inlet) 235.00 67.88

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): 3.0
Channel Type: Main Channel (>50% of water flow)
Comments: Nothing was caught.
 
Gear Type: Minnow Trap (B) Trap Duration(h): 3.0
Channel Type: Main Channel (>50% of water flow)
Comments: 2 freshwater sculpin were caught: one measuring 60mm and the other measuring 65mm.
 
Gear Type: Visual Observation, Ground (C)
Comments: An adult arctic grayling was seen swimming downstream through the pipe during this survey.

Fish Observations

Species: sculpin-unspecified Life History: Resident
Total Fish Observed: 2 Fish Measured: 2 Fork Lengths (mm) Min: 60 Max: 65 Mean: 62
Collected/Observed by Gear Type: Downstream Minnow Trap (2)  
 
Species: no fish collected or observed Life History: Not Applicable
Total Fish Observed: 0 Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: Upstream Minnow Trap (0)  
 
Species: adult Arctic grayling Life History: Resident
Total Fish Observed: 1 Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: At Site Visual Observation, Ground (1)  

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