Fish Passage Site 20501258

Coordinates (dec. deg.): 61.65263°, -149.82623°
Legal Description: S018N003W16
Region: South Central
Road Name: Zero Lakes Road

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

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 MSB09-ZLR01

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

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert gradient red
  2. Compound gradient in pipe

Comments: Pipe 1 is set as overflow pipe and dry.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 31.9
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 3
Approach Angle: 12.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):1.9 2.0
Height(ft):1.9 2.0
Apron Length(ft):
Water Depth(ft): 0.0
Rustline Height(ft):0.0
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: Overflow Pipe
Constriction Ratio:
Culvert Gradient: 2.98%
Max Slope:
Max Slope Length:
 

Comments: Pipe is dry overflow pipe.
  Culvert Observations:
  1. Culvert gradient red
ID: 2 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 30.1
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 2
Approach Angle: 12.0
Sedimentation At Inlet: Yes
Inlet Substrate: Silt/Clay
Outlet Substrate: None
InletOutlet
Width(ft):4.0 4.1
Height(ft):3.4 3.9
Apron Length(ft):
Water Depth(ft): 0.4
Rustline Height(ft):0.6
Substrate Depth(ft):0.7 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 1.14
Culvert Gradient: 2.29%
Max Slope:
Max Slope Length:
 

Comments: Compound grade b/c uneven distrib of subs in pipe. Pipe gradient w/o subs is nearly flat. Gradient taken on substrate for %slope.
  Culvert Observations:
  1. Culvert gradient red
  2. Compound gradient in pipe

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:Silt/ClayGravel
Subdominant:GravelGravel
Stream Slope(deg.):
Stream Flow Stage:Low
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 96.0 4.50
Upstream ordinary high water 125.0 4.00
Upstream ordinary high water 148.0 2.50

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Outlet Pool Water Elev 2 96.80
U/S Headwater 2 97.27
D/S Grade Ctrl (Thalweg) 2 0.00 18.0 95.83
D/S Water Surface Elev (@GP) 2 0.00 18.0 95.96
D/S Tailcrest or 1st Thalweg 2 11.00 7.0 96.66
D/S Water Surface Elev (@TWC) 2 11.00 7.0 96.79
D/S Thalweg 2 13.00 5.0 96.46
Outlet Invert ((no water)) 1 18.00 0.0 97.95
Outlet Invert 2 18.00 0.0 96.40
Road Elev 2 33.50 102.49
Inlet Culvert Invert (main pipe (on substrate)) 2 48.10 0.0 97.09
U/S Grade Ctrl (Thalweg) (TC of 1st u/s pool) 2 49.10 1.0 97.15
U/S Water Surface Elev (@GP) 2 49.10 1.0 97.32
Inlet Culvert Invert (pipe 1 is small overflow pipe (dry)) 1 49.90 0.0 98.90

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): 1.0
Comments: no fish caught; 60ft d/s
 
Gear Type: Minnow Trap (B) Trap Duration(h): 1.0
Comments: 30ft u/s

Fish Observations

Species: rainbow trout Life History: Not Recorded
Total Fish Observed: 2 Fish Measured: 2 Fork Lengths (mm) Min: 71 Max: 104 Mean: 87
Collected/Observed by Gear Type: Upstream Minnow Trap (2)  

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