Fish Passage Site 10103601

Coordinates (dec. deg.): 55.72002°, -132.92995°
Legal Description: C071S081E13
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 18, 2017

Survey SEA17-NPW35

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
  3. Compound gradient in pipe

Comments: Small stream, mostly low gradient riffle downstream with some large woody debris. Log step 1ft high 50ft downstream. Upstream some big boulders, first resting about 20ft from inlet. Upstream channels turns south after 50ft.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 127.0
Inlet Type: Mitered
Outlet Type: Mitered
Corrugation Depth(in.): 2.0
Corrugation Width(in.): 3.3
Condition Rating(1-5): 3
Approach Angle: 0.0
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):2.9 2.9
Height(ft):2.9 2.98
Apron Length(ft):
Water Depth(ft): 0.03
Rustline Height(ft):1.0
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 1.89
Outfall Type: Free Fall on To Rip Rap
Constriction Ratio: 1.23
Culvert Gradient: 7.52%
Max Slope:
Max Slope Length:
 

Comments: Top of culvert length 113'.
  Culvert Observations:
  1. Outfall height red
  2. Culvert gradient red
  3. Compound gradient in pipe

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:CobbleGravel
Subdominant:GravelCobble
Stream Slope(deg.):8.04
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 10.0 1.30
Upstream ordinary high water 40.0 2.80
Upstream ordinary high water 70.0 1.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 120.97
D/S Grade Ctrl (Thalweg) 0.00 92.93
D/S Water Surface Elev 0.00 92.99
D/S Tailcrest or 1st Thalweg (gravel bar) 15.00 93.72
D/S Water Surface Elev 15.00 94.83
Outlet Pool Water Elev 20.00 94.79
Max Pool Depth 20.00 93.29
D/S Grade Ctrl (Thalweg) (outfall hits rock) 29.00 95.19
D/S Water Surface Elev 29.00 95.84
Outlet Invert (on pipe) 29.00 96.65
D/S Water Surface Elev 29.00 96.68
Outlet Culvert Top 36.00 100.00
Inlet Culvert Top 149.00 109.19
Inlet Culvert Invert (on pipe) 156.00 106.20
U/S Water Surface Elev 156.00 106.47
U/S Grade Ctrl (Thalweg) 160.00 107.37
U/S Water Surface Elev 160.00 107.54
U/S Grade Ctrl (Thalweg) 185.00 111.96
U/S Water Surface Elev 185.00 112.18
U/S Grade Ctrl (Thalweg) 200.00 113.06
U/S Water Surface Elev 200.00 113.73
U/S Grade Ctrl (Thalweg) 254.00 114.84
U/S Water Surface Elev 254.00 114.94

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): 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