Fish Passage Site 20501165

Coordinates (dec. deg.): 61.65770°, -149.93669°
Legal Description: S018N004W11
Region: South Central
Road Name: Alaska Railroad

Datum: WGS84
Quad Name / ITM: Anchorage C-8
AWC Stream #:
Stream Name: Lake Creek tributary

Elevation:

Site Comments: Trib to Lake Ck, TMP 178.5

Survey Date: Aug 28, 2009

Survey MSB09-ARR08

Project Supervisor: Gillian O'Doherty, ADFG
Observers: Gillian O'Doherty, Ben Histand

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools:
Construction Year:


Site Observations:

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

Comments: None

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 44.7
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 2
Approach Angle: 0.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):4.2 4.0
Height(ft):3.8 4.0
Apron Length(ft):
Water Depth(ft): 0.15
Rustline Height(ft):1.3
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.48
Outfall Type: Free Fall In To Pool
Constriction Ratio: 0.53
Culvert Gradient: 1.30%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient red
  2. Outfall height red
  3. Constriction ratio gray

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:GravelGravel
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 50.0 5.50
Upstream ordinary high water 125.0 6.50
Upstream ordinary high water 170.0 10.50

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Outlet Pool Water Elev 1 95.26
U/S Headwater 1 96.48
D/S Grade Ctrl (Thalweg) 1 0.00 34.0 94.53
D/S Water Surface Elev (@GP) 1 0.00 34.0 94.72
D/S Tailcrest or 1st Thalweg 1 19.00 15.0 95.12
D/S Water Surface Elev (@TWC) 1 19.00 15.0 95.26
D/S Thalweg (outlet pool bottom) 1 30.00 4.0 93.72
D/S Thalweg 1 34.00 0.0 95.06
Outlet Invert 1 34.00 0.0 95.59
Road Elev 1 56.00 105.68
Inlet Culvert Invert 1 78.70 0.0 96.17
U/S Grade Ctrl (Thalweg) 1 83.70 5.0 96.45
U/S Water Surface Elev (@GP) 1 83.70 5.0 96.67

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)
Comments: 70ft u/s; no set length recorded
 
Gear Type: Minnow Trap (B)
Comments: 100ft d/s; no set length recorded

Fish Observations

Species: juvenile Dolly Varden Life History: Not Recorded
Total Fish Observed: 2 Fish Measured: 2 Fork Lengths (mm) Min: 47 Max: 52 Mean: 49
Collected/Observed by Gear Type: Upstream Minnow Trap (2)  
 
Species: juvenile coho salmon Life History: Not Recorded
Total Fish Observed: 4 Fish Measured: 4 Fork Lengths (mm) Min: 51 Max: 60 Mean: 55
Collected/Observed by Gear Type: Downstream Minnow Trap (1)  Upstream Minnow Trap (3)  
 
Species: slimy sculpin Life History: Not Recorded
Total Fish Observed: 1 Fish Measured: 1 Fork Lengths (mm) Min: 83 Max: 83 Mean: 83
Collected/Observed by Gear Type: Downstream Minnow Trap (1)  
 
Species: ninespine stickleback Life History: Not Recorded
Total Fish Observed: 3 Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: Downstream Minnow Trap (3)  

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