Fish Passage Site 10103575

Coordinates (dec. deg.): 55.81110°, -133.03659°
Legal Description: C070S081E08
Region: Southeast
Road Name: North Prince of Wales Road

Datum: NAD83
Quad Name / ITM: Craig D-4
AWC Stream #:
Stream Name: Unnamed

Elevation:

Site Comments: None

Survey Date: Jun 14, 2017

Survey SEA17-NPW09

Observers: Elizabeth Flory, Kelly Petty

Overall Fish Passage Rating: Gray

Tidal: Maybe
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Debris Flow
  2. Compound gradient in pipe
  3. Culvert gradient gray

Comments: Trout upstream and downstream. Stream gradient includes bedrock chute - trout found above chute.

Culvert Measurements

ID: 1 Structure Type: Open-bottom arch (Structural steel plate) Fish Passage Rating: Gray
 
Length(ft): 87.6
Inlet Type: Projecting
Outlet Type: Mitered
Corrugation Depth(in.): 3.0
Corrugation Width(in.): 6.6
Condition Rating(1-5): 3
Approach Angle: 4.0
Sedimentation At Inlet: Yes
Inlet Substrate: Cobble
Outlet Substrate: Cobble
InletOutlet
Width(ft):7.78 8.0
Height(ft):3.11 4.68
Apron Length(ft):
Water Depth(ft): 0.25
Rustline Height(ft):3.0
Substrate Depth(ft):4.67 3.32
Backwatered?: No
Baffles Present: No
Embedded?: Yes
Embedded Depth(ft): 3.32
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio:
Culvert Gradient: 7.64%
Max Slope:
Max Slope Length:
 

Comments: Gradient break inside pipe, rock step of 1ft, pool at base of step is 1.5ft deep. Lots of big rocks inside pipe. Hydraulic jump caused by big rocks. Mitre at outlet only. Stream reach short for gradient 84ft instead of 100ft. Included bedrock chute. Less steep above. Water surface gradient through culvert 9.19%. Bedrock step inside culvert may be a potential barrier to juvenile passage.
  Culvert Observations:
  1. Debris Flow
  2. Compound gradient in pipe

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:BedrockCobble
Subdominant:CobbleBoulder
Stream Slope(deg.):8.77
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 50.0 4.89
Upstream ordinary high water 100.0 6.00
Upstream ordinary high water 150.0 4.10

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 115.15
D/S Grade Ctrl (Thalweg) (boulders) 0.00 92.88
D/S Water Surface Elev 0.00 96.29
D/S Tailcrest or 1st Thalweg (boulders) 15.00 93.61
D/S Water Surface Elev 15.00 94.01
D/S Water Surface Elev 18.00 94.02
Max Pool Depth 18.00 93.19
Outlet Invert (on substrate) 22.00 93.71
D/S Water Surface Elev 22.00 93.96
D/S Grade Ctrl (Thalweg) (pipe step) 25.00 94.87
D/S Water Surface Elev 25.00 95.09
Outlet Culvert Top 28.00 100.00
Inlet Culvert Top 115.60 106.69
Inlet Culvert Invert (on substrate) 117.60 102.46
U/S Water Surface Elev 117.60 102.69
U/S Grade Ctrl (Thalweg) (pool) 124.60 102.26
U/S Water Surface Elev 124.60 103.01
U/S Grade Ctrl (Thalweg) (boulders) 126.60 103.56
U/S Water Surface Elev 126.60 103.72
U/S Water Surface Elev 133.60 103.21
U/S Grade Ctrl (Thalweg) 133.60 102.92
U/S Grade Ctrl (Thalweg) 173.60 107.54
U/S Water Surface Elev 173.60 107.69
U/S Grade Ctrl (Thalweg) 208.60 110.18
U/S Water Surface Elev 208.60 110.38

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): 2.0
Comments: 1 rainbow 20ft upstream
 
Gear Type: Minnow Trap (B) Trap Duration(h): 2.0
Comments: 1 cutthroat 3ft downstream

Fish Observations

Species: juvenile rainbow trout Life History:
Total Fish Observed: 1 Fish Measured: 1 Fork Lengths (mm) Min: 75 Max: 75 Mean: 75
Collected/Observed by Gear Type: Upstream Minnow Trap (1)  
 
Species: juvenile cutthroat trout Life History:
Total Fish Observed: 1 Fish Measured: 1 Fork Lengths (mm) Min: 102 Max: 102 Mean: 102
Collected/Observed by Gear Type: Downstream Minnow Trap (1)  

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