Fish Passage Site 50101619

Coordinates (dec. deg.): 64.73909°, -165.23665°
Legal Description: K009S033W03
Region: Arctic
Road Name: Kougarok Road

Datum: NAD83
Quad Name / ITM: Nome C-1
AWC Stream #:
Stream Name: Unnamed

Elevation:

Site Comments: Mile 20.1. BLM "Cadastrak" survey marker 125' u/s of x-ing.

Survey Date: Sep 26, 2005

Survey SEW05-KR31

Project Supervisor: Dave Ryland,
Observers: Dave Ryland, Jason Cheney, Paul Thompson

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Outfall height red
  2. Culvert gradient gray
  3. Constriction ratio red
  4. Mechanical damage or joints parting
  5. Inlet perch

Comments: Adult coho observed u/s of crossing.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 72.0
Inlet Type: Mitered
Outlet Type: Mitered
Corrugation Depth(in.): 0.75
Corrugation Width(in.): 2.75
Condition Rating(1-5): 3
Approach Angle: 52.0
Sedimentation At Inlet:
Inlet Substrate: Boulder
Outlet Substrate: None
InletOutlet
Width(ft):5.0
Height(ft):5.0
Apron Length(ft):
Water Depth(ft): 1.5
Rustline Height(ft):1.0
Substrate Depth(ft):0.0 0.0
Backwatered?:
Baffles Present: No
Embedded?: No
Embedded Depth(ft): 0.0
Outfall Height: 0.81
Outfall Type: Free Fall In To Pool
Constriction Ratio: 0.33
Culvert Gradient: 1.81%
Max Slope:
Max Slope Length:
 

Comments: Inlet contains 2 or 3 (1.5-2'-dia) boulders;Rust line hgt estimated;
  Culvert Observations:
  1. Mechanical damage or joints parting
  2. Culvert is poorly aligned
  3. Outfall height red
  4. Culvert gradient gray
  5. Constriction ratio red
  6. Inlet perch
ID: 2 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 71.9
Inlet Type: Mitered
Outlet Type: Mitered
Corrugation Depth(in.): 0.75
Corrugation Width(in.): 2.75
Condition Rating(1-5): 3
Approach Angle: 52.0
Sedimentation At Inlet:
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):5.0
Height(ft):5.0
Apron Length(ft):
Water Depth(ft): 1.0
Rustline Height(ft):0.7
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Embedded Depth(ft): 0.0
Outfall Height: 0.73
Outfall Type: Free Fall In To Pool
Constriction Ratio: 0.33
Culvert Gradient: 3.09%
Max Slope:
Max Slope Length:
 

Comments: primary flow is in Lt pipe; U/s end section of Rt pipe is bent upward increasing the slope for last 5 ft
  Culvert Observations:
  1. Culvert is poorly aligned
  2. Mechanical damage or joints parting
  3. Outfall height red
  4. Culvert gradient red
  5. Constriction ratio red
  6. Inlet perch

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelCobble
Subdominant:CobbleGravel
Stream Slope(deg.):
Stream Flow Stage:
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water
Downstream ordinary high water 146.0 19.10
Upstream bank full 75.0 26.70
Upstream bank full 100.0 20.00
Upstream bank full 125.0 31.60
Upstream bank full 150.0 45.10
Upstream bed width 75.0 14.70
Upstream bed width 100.0 11.20
Upstream bed width 125.0 8.20
Upstream bed width 150.0 19.40
Upstream ordinary high water 75.0 20.80
Upstream ordinary high water 100.0 14.30
Upstream ordinary high water 125.0 16.10
Upstream ordinary high water 150.0 34.30

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Max Pool Depth 2 2.10
Outlet Pool Water Elev 94.70
Max Pool Depth 1 2.00
U/S Thalweg 97.72
D/S Grade Ctrl (Thalweg) 0.00 146.0 92.95
D/S Tailcrest or 1st Thalweg 114.00 32.0 93.81
OHW (Outlet Tailcrest) 114.00 32.0 94.75
D/S Thalweg 2 141.00 5.0 1.80
D/S Thalweg 1 141.00 5.0 2.00
Outlet Invert 1 146.00 0.0 94.01
Outlet Invert 2 146.00 0.0 94.43
Road Elev 182.00 102.19
Inlet Culvert Invert 2 218.00 0.0 96.65
Inlet Culvert Invert 1 218.00 0.0 95.31
U/S Thalweg 1 228.00 10.0 96.60
U/S Thalweg 2 228.00 10.0 97.22
U/S Thalweg 343.00 125.0 96.82

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

No fish sampling occurred during this survey.

Fish Observations

No fish observations occurred during this survey.

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