Fish Passage Site 20300998

Coordinates (dec. deg.): 60.45785°, -150.19827°
Legal Description: S004N005W08
Region: South Central
Road Name: Skilak Lake Road

Datum: NAD83
Quad Name / ITM: Kenai B-1
AWC Stream #: 244-30-10010-2137
Stream Name: Hidden Creek

Elevation:

Site Comments: None

Multiple surveys have been conducted at this site — click on the drop down
arrow to the right of the survey date below to choose a different report for this site.

Survey KPCS1-NK043

Observers: Cecil Rich, Michael Lund, James Maple

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools:
Construction Year:


Comments: Structural plate crushed at outlet.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated Metal) Fish Passage Rating:
 
Length(ft): 60.0
Inlet Type: Projecting
Outlet Type:
Corrugation Depth(in.): 2.0
Corrugation Width(in.): 6.0
Condition Rating(1-5):
Approach Angle:
Sedimentation At Inlet:
Inlet Substrate: Cobble
Outlet Substrate: Gravel
InletOutlet
Width(ft):7.9 4.5
Height(ft):6.69 6.2
Apron Length(ft):
Water Depth(ft):0.83 0.83
Rustline Height(ft):
Substrate Depth(ft):2.4 0.0
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height: 0.54
Outfall Type:
Constriction Ratio: 0.31
Culvert Gradient: -2.38%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Other, including vibrations, cavitation, etc.

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:CobbleCobble
Subdominant:GravelGravel
Stream Slope(deg.):
Stream Flow Stage:
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 10.0 22.50
Downstream ordinary high water 50.0 29.60
Downstream ordinary high water 100.0 19.00
Upstream ordinary high water 5.0 24.90
Upstream ordinary high water 62.0 24.60
Upstream ordinary high water 100.0 25.60

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Thalweg 0.00 100.0 95.21
D/S Water Surface Elev 0.00 100.0 95.58
D/S OHW Elev 0.00 100.0 96.37
D/S Thalweg 50.00 50.0 95.79
D/S OHW Elev 50.00 50.0 96.48
D/S Water Surface Elev 50.00 50.0 96.15
D/S Water Surface Elev 90.00 10.0 96.98
OHW Left Bank 90.00 10.0 97.40
D/S Tailcrest or 1st Thalweg 90.00 10.0 95.96
OHW Left Bank 95.00 5.0 97.48
OHW Left Bank 95.00 5.0 96.92
Max Pool Depth 97.50 2.5 94.57
D/S Thalweg 97.60 2.4 94.65
Outlet Thalweg 1 100.00 0.0 95.30
Outlet Invert 1 100.00 0.0 96.63
Outlet Rustline Height 1 100.00 0.0 98.21
Outlet Culvert Top 1 100.00 0.0 102.13
Road Elev 130.00 106.92
Road Elev 130.00 107.00
Inlet Culvert Top 1 160.00 0.0 103.11
Inlet Rustline Height 1 160.00 0.0 98.49
Inlet Culvert Invert 1 160.00 0.0 95.20
Inlet Thalweg 1 160.00 0.0 96.43
U/S Thalweg 1 161.00 1.0 96.51
U/S Thalweg 1 165.00 5.0 96.68
U/S Water Surface Elev 1 165.00 5.0 97.66
U/S OHW elevation 1 165.00 5.0 98.09
U/S Thalweg 1 178.80 18.8 96.80
U/S Thalweg 222.00 62.0 97.74
U/S Water Surface Elev 222.00 62.0 98.91
U/S Headwater 222.00 62.0 99.88
U/S Headwater 260.00 100.0 100.22
U/S Water Surface Elev 260.00 100.0 99.13
U/S Thalweg 260.00 100.0 98.68

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): 1.3
 
Gear Type: Minnow Trap (B) Trap Duration(h): 2.1

Fish Observations

Species: juvenile Dolly Varden Life History: Resident
Total Fish Observed: 6 Fish Measured: 2 Fork Lengths (mm) Min: 64 Max: 138 Mean: 101
Collected/Observed by Gear Type: Downstream Minnow Trap (2)  Upstream Minnow Trap (4)  
 
Species: adult stickleback-unspecified Life History: Resident
Total Fish Observed: 14 Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: Downstream Minnow Trap (12)  Upstream Minnow Trap (2)  
 
Species: juvenile Chinook salmon Life History: Anadromous
Total Fish Observed: 7 Fish Measured: 3 Fork Lengths (mm) Min: 90 Max: 105 Mean: 97
Collected/Observed by Gear Type: Downstream Minnow Trap (6)  Upstream Minnow Trap (1)  
 
Species: juvenile coho salmon Life History: Anadromous
Total Fish Observed: 126 Fish Measured: 20 Fork Lengths (mm) Min: 48 Max: 90 Mean: 66
Collected/Observed by Gear Type: Downstream Minnow Trap (85)  Upstream Minnow Trap (41)  
 
Species: juvenile rainbow trout Life History: Resident
Total Fish Observed: 7 Fish Measured: 3 Fork Lengths (mm) Min: 59 Max: 81 Mean: 71
Collected/Observed by Gear Type: Downstream Minnow Trap (2)  Upstream Minnow Trap (5)  
 
Species: juvenile/adult sculpin-unspecified Life History: Resident
Total Fish Observed: 1 Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: Upstream Minnow Trap (1)  

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