Fish Passage Site 20303745

Coordinates (dec. deg.): 60.48698°, -150.99910°
Legal Description: S005N010W35
Region: South Central
Road Name: Private Drive

Datum: NAD83
Quad Name / ITM: Kenai B-3
AWC Stream #:
Stream Name: Unnamed

Elevation:

Site Comments: Site is on an unnamed road down from the gravel pit by the state forestry office on the Sterling Highway.

Survey Date: May 19, 2017

Survey KEN17-DOF01

Observers: Elise Idle, Maggie Schaffer

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert gradient gray
  2. Constriction ratio gray
  3. Outfall height red

Comments: Information collected and submitted by USFWS and KWF. AWC Stream #244-30-10010-2041 is just downstream from this site. Site was used as a training exercise for assessing culvert and fish passage.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 20.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.5
Condition Rating(1-5): 3
Approach Angle: 60.0
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):1.25 1.25
Height(ft):1.25 1.25
Apron Length(ft):
Water Depth(ft): 0.13
Rustline Height(ft):0.4
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.85
Outfall Type: Free Fall In To Pool
Constriction Ratio: 0.56
Culvert Gradient: 0.85%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient gray
  2. Constriction ratio gray
  3. Outfall height red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:Silt/ClaySilt/Clay
Subdominant:OrganicOrganic
Stream Slope(deg.):0.18
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 28.0 1.90
Upstream ordinary high water 39.5 2.40
Upstream ordinary high water 46.0 2.40

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 98.55
D/S Thalweg 0.00 94.55
D/S Water Surface Elev 0.00 95.46
D/S Water Surface Elev 12.90 95.50
D/S Thalweg 12.90 94.96
D/S Thalweg 18.20 95.10
D/S Water Surface Elev 18.20 95.52
D/S Grade Ctrl (Thalweg) (Log top) 18.70 95.81
D/S Grade Ctrl (Thalweg) (Log bottom) 18.70 95.91
Outlet Pool Water Elev 19.20 95.78
Max Pool Depth 19.20 95.26
Outlet Invert (On pipe) 20.00 96.24
D/S Water Surface Elev 20.00 96.37
Outlet Culvert Top 20.00 97.54
Inlet Culvert Top 40.00 97.68
Inlet Culvert Invert (on pipe) 40.00 96.39
U/S Water Surface Elev 40.00 96.78
U/S Water Surface Elev (stream gradient lower point) 65.00 96.79
U/S Thalweg 65.00 95.95
U/S Thalweg 80.00 96.06
U/S Water Surface Elev 80.00 96.81
U/S Water Surface Elev (stream gradient upper point) 180.00 97.00
U/S Thalweg 180.00 96.20

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: Trap set about 50 feet upstream.
 
Gear Type: Minnow Trap (B) Trap Duration(h): 2.0
Comments: Trap set about 150 feet downstream.

Fish Observations

Species: juvenile coho salmon Life History: Anadromous
Total Fish Observed: 3 Fish Measured: 3 Fork Lengths (mm) Min: 55 Max: 60 Mean: 58
Collected/Observed by Gear Type: Downstream Minnow Trap (3)  
 
Species: juvenile/adult Dolly Varden Life History: Unknown
Total Fish Observed: 1 Fish Measured: 1 Fork Lengths (mm) Min: 96 Max: 96 Mean: 96
Collected/Observed by Gear Type: Downstream Minnow Trap (1)  

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