Fish Passage Site 20303806

Coordinates (dec. deg.): 60.52429°, -149.64432°
Legal Description: S005N002W16
Region: South Central
Road Name: Sterling Highway

Datum: NAD83
Quad Name / ITM: Seward C-8
AWC Stream #: 244-30-10010-2177-3022
Stream Name: Unnamed

Elevation:

Site Comments: None

Survey Date: Aug 31, 2018

Survey KEN18-UCSH1

Observers: Maggie Harings, Alice Main

Overall Fish Passage Rating: Gray

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert sagging in middle
  2. Culvert gradient gray

Comments: Culvert Assessment and photos submitted by Kenai Watershed Forum.

Culvert Measurements

ID: 1 Structure Type: Pipe-arch (Corrugated steel) Fish Passage Rating: Gray
 
Length(ft): 114.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle:
Sedimentation At Inlet: No
Inlet Substrate: Gravel
Outlet Substrate: Silt/Clay
InletOutlet
Width(ft):6.7 6.6
Height(ft):5.34 5.4
Apron Length(ft):
Water Depth(ft): 1.62
Rustline Height(ft):
Substrate Depth(ft): 0.15
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.98
Culvert Gradient: 1.36%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient gray
  2. Culvert sagging in middle

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:SandSilt/Clay
Stream Slope(deg.):1.07
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 15.0 6.90
Upstream ordinary high water 30.0 7.10
Upstream ordinary high water 49.0 7.00
Upstream ordinary high water 78.0 6.40

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 101.39
D/S Grade Ctrl (Thalweg) 0.00 90.39
D/S Water Surface Elev 0.00 90.98
D/S Grade Ctrl (Thalweg) 24.00 91.10
D/S Water Surface Elev 24.00 91.37
D/S Tailcrest or 1st Thalweg 48.00 90.42
D/S Water Surface Elev 48.00 91.39
Outlet Pool Water Elev 69.00 91.38
Max Pool Depth 69.00 89.35
Outlet Invert 79.00 89.76
D/S Water Surface Elev 79.00 91.38
Outlet Culvert Top 79.00 95.12
Inlet Culvert Top 193.00 96.67
Inlet Culvert Invert (on substrate) 193.00 91.33
U/S Water Surface Elev 193.00 92.07
U/S Grade Ctrl (Thalweg) 221.00 92.11
U/S Water Surface Elev 221.00 92.80
U/S Thalweg 268.00 92.63
U/S Water Surface Elev 268.00 93.37
U/S Water Surface Elev 293.00 93.63
U/S Thalweg 293.00 93.02
U/S Water Surface Elev 323.00 93.89
U/S Grade Ctrl (Thalweg) 323.00 93.40
U/S Water Surface Elev 333.00 94.43
U/S Thalweg (Max pool depth) 333.00 92.89

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): 2.1
Comments: Trap set about 40 feet upstream.
 
Gear Type: Minnow Trap (B) Trap Duration(h): 1.9166666
Comments: Trap set about 45 feet downstream.

Fish Observations

Species: juvenile coho salmon Life History: Anadromous
Total Fish Observed: 3 Fish Measured: 3 Fork Lengths (mm) Min: 46 Max: 52 Mean: 48
Collected/Observed by Gear Type: Downstream Minnow Trap (3)  

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