Fish Passage Site 10103571

Coordinates (dec. deg.): 55.82262°, -133.04231°
Legal Description: C070S081E06
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 12, 2017

Survey SEA17-NPW05

Observers: Elizabeth Flory, Kelly Petty

Overall Fish Passage Rating: Gray

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert gradient gray
  2. Beaver Activity

Comments: Upstream has lower gradient than pipe. Beaver dam downstream forms 4ft high step. Looks backwatered but is not.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Gray
 
Length(ft): 73.7
Inlet Type: Mitered
Outlet Type: Mitered
Corrugation Depth(in.): 2.0
Corrugation Width(in.): 3.4
Condition Rating(1-5): 4
Approach Angle: 3.0
Sedimentation At Inlet: Yes
Inlet Substrate: Cobble
Outlet Substrate: Organic
InletOutlet
Width(ft):5.6 6.4
Height(ft):3.0 5.3
Apron Length(ft):
Water Depth(ft): 0.46
Rustline Height(ft):
Substrate Depth(ft):2.6 1.1
Backwatered?: No
Baffles Present: No
Embedded?: Yes
Embedded Depth(ft): 1.1
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 1.61
Culvert Gradient: 2.45%
Max Slope:
Max Slope Length:
 

Comments: No visible rustline. No fish observed. Pipe gradient over 1% greater than stream gradient. Top of culvert length 61.7'.
  Culvert Observations:
  1. Culvert gradient gray
  2. Beaver Activity

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:OrganicOrganic
Subdominant:GravelGravel
Stream Slope(deg.):1.25
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 25.0 2.40
Upstream ordinary high water 50.0 6.20
Upstream ordinary high water 100.0 3.20
Upstream ordinary high water 150.0 2.10

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 105.12
D/S Grade Ctrl (Thalweg) (log step) 0.00 92.20
D/S Water Surface Elev 0.00 92.39
D/S Tailcrest or 1st Thalweg 16.00 93.64
D/S Water Surface Elev 16.00 94.08
D/S Water Surface Elev 17.00 94.08
Outlet Invert (on substrate) 17.00 93.62
Outlet Culvert Top 23.00 98.49
Inlet Culvert Top 84.70 100.00
Inlet Culvert Invert (on substrate) 90.70 96.68
U/S Water Surface Elev 90.70 96.86
U/S Grade Ctrl (Thalweg) (rocks) 97.70 97.12
U/S Water Surface Elev 97.70 97.32
U/S Grade Ctrl (Thalweg) (rocks) 105.70 97.52
U/S Water Surface Elev 105.70 97.82
U/S Water Surface Elev 165.70 99.20
U/S Grade Ctrl (Thalweg) (logs) 165.70 99.21
U/S Water Surface Elev 206.70 98.68
U/S Grade Ctrl (Thalweg) (logs) 206.70 98.94

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: no fish
 
Gear Type: Minnow Trap (B) Trap Duration(h): 2.0
Comments: no fish

Fish Observations

No fish observations occurred during this survey.

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