Fish Passage Site 10103591

Coordinates (dec. deg.): 55.74156°, -132.96973°
Legal Description: C071S081E03
Region: Southeast
Road Name: North Prince of Wales Road

Datum: NAD83
Quad Name / ITM: Craig C-3
AWC Stream #:
Stream Name: Unnamed

Elevation:

Site Comments: None

Survey Date: Jul 11, 2017

Survey SEA17-NPW25

Observers: Elizabeth Flory, Kelly Petty

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert is poorly aligned
  2. Outfall height red

Comments: Upstream runs from both north and south in road ditch into culvert. Downstream is nice gravel riffles and large woody debris pools, gentle gradient, cutthroat trout present. Baffles in culvert.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 87.0
Inlet Type: Mitered
Outlet Type: Mitered
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 3.0
Condition Rating(1-5): 4
Approach Angle: 54.0
Sedimentation At Inlet: Yes
Inlet Substrate: Boulder
Outlet Substrate: Boulder
InletOutlet
Width(ft):5.5 5.2
Height(ft):4.11 4.45
Apron Length(ft):
Water Depth(ft): 0.19
Rustline Height(ft):0.98
Substrate Depth(ft):1.39 0.75
Backwatered?: No
Baffles Present: Yes
Embedded?: No
Outfall Height: 0.62
Outfall Type: Free Fall In To Pool
Constriction Ratio: 1.4
Culvert Gradient: 3.05%
Max Slope:
Max Slope Length:
 

Comments: Outlet sitting high, not at grade. Top of culvert length 71ft. Through pipe gradient 3.78% Baffle at outlet has scoured away downstream sediment and created a .62' outfall barrier.
  Culvert Observations:
  1. Culvert is poorly aligned
  2. Outfall height red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:CobbleCobble
Stream Slope(deg.):3.76
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 35.0 4.00
Downstream ordinary high water 105.0 4.20
Downstream ordinary high water 115.0 3.60
Upstream ordinary high water 20.0 2.10
Upstream ordinary high water 40.0 2.30
Upstream ordinary high water 60.0 1.50

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 114.68
D/S Grade Ctrl (Thalweg) 0.00 95.00
D/S Water Surface Elev 0.00 95.24
D/S Grade Ctrl (Thalweg) 61.00 97.54
D/S Water Surface Elev 61.00 97.81
D/S Tailcrest or 1st Thalweg (gravel) 97.00 98.60
D/S Water Surface Elev 97.00 98.89
Max Pool Depth 104.00 97.80
D/S Water Surface Elev 104.00 98.83
D/S Water Surface Elev 106.50 98.92
Outlet Invert (end of mitre) 106.50 98.73
D/S Grade Ctrl (Thalweg) (Top of baffle) 107.00 99.13
D/S Water Surface Elev 107.00 99.45
Outlet Culvert Top 114.00 104.38
Inlet Culvert Top 185.00 106.55
Inlet Culvert Invert (end of mitre) 193.00 101.37
U/S Water Surface Elev 193.00 102.21
U/S Water Surface Elev 200.00 102.51
U/S Grade Ctrl (Thalweg) 200.00 101.32
U/S Grade Ctrl (Thalweg) 213.00 104.01
U/S Water Surface Elev 213.00 104.40

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): 1.75
Comments: no fish
 
Gear Type: Minnow Trap (B) Trap Duration(h): 1.75
Comments: 2 cutthroat, 20ft downstream

Fish Observations

Species: juvenile cutthroat trout Life History:
Total Fish Observed: 2 Fish Measured: 2 Fork Lengths (mm) Min: 60 Max: 73 Mean: 66
Collected/Observed by Gear Type: Downstream Minnow Trap (2)  

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