Fish Passage Site 10103577

Coordinates (dec. deg.): 55.80071°, -133.03371°
Legal Description: C070S081E17
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 15, 2017

Survey SEA17-NPW11

Observers: Elizabeth Flory, Kelly Petty

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Outfall height red
  2. Culvert gradient red

Comments: Small channel upstream with cascading step pools, slightly bigger downstream with lots of logging slash before turning into pond. No fish caught. Outfall on to riprap. Stream gradient visually accessed at about 2.5%.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 75.4
Inlet Type: Mitered
Outlet Type: Mitered
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.0
Condition Rating(1-5): 4
Approach Angle: 0.0
Sedimentation At Inlet: Yes
Inlet Substrate: Cobble
Outlet Substrate: None
InletOutlet
Width(ft):3.2 3.0
Height(ft):3.0 3.0
Apron Length(ft):
Water Depth(ft): 0.25
Rustline Height(ft):1.0
Substrate Depth(ft):0.2 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 14.35
Outfall Type: Free Fall on To Rip Rap
Constriction Ratio: 1.37
Culvert Gradient: 2.63%
Max Slope:
Max Slope Length:
 

Comments: Outfall height measured from base of riprap. Top of culvert length 63.4.
  Culvert Observations:
  1. Outfall height red
  2. Culvert gradient red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:CobbleSilt/Clay
Subdominant:BoulderOrganic
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 40.0 4.80
Downstream ordinary high water 80.0 4.20
Downstream ordinary high water 100.0 3.70
Upstream ordinary high water 30.0 2.50
Upstream ordinary high water 50.0 3.00
Upstream ordinary high water 100.0 1.50

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 107.44
D/S Grade Ctrl (Thalweg) (base of riprap) 0.00 82.59
D/S Water Surface Elev 0.00 82.81
D/S Grade Ctrl (Thalweg) 32.00 92.59
D/S Water Surface Elev 32.00 92.99
D/S Grade Ctrl (Thalweg) (pool top of riprap) 39.00 94.65
D/S Water Surface Elev 39.00 94.92
Outlet Invert (end of mitre) 40.00 96.91
D/S Water Surface Elev 40.00 97.16
Outlet Culvert Top 46.00 100.00
Inlet Culvert Top 109.40 101.69
Inlet Culvert Invert 114.40 98.89
U/S Water Surface Elev 114.40 99.00
U/S Grade Ctrl (Thalweg) 118.40 99.02
U/S Water Surface Elev 118.40 99.23
U/S Grade Ctrl (Thalweg) (gravel) 135.40 99.68
U/S Water Surface Elev 135.40 99.76
U/S Grade Ctrl (Thalweg) (top of boulder falls, too much log slash beyond) 153.40 99.80
U/S Water Surface Elev 153.40 100.28

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): 1.5
Comments: no fish
 
Gear Type: Minnow Trap (B) Trap Duration(h): 1.5
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