Fish Passage Site 20501159

Coordinates (dec. deg.): 61.58184°, -149.59375°
Legal Description: S017N002W11
Region: South Central
Road Name: Alaska Railroad

Datum: WGS84
Quad Name / ITM: Anchorage C-7
AWC Stream #:
Stream Name: Unnamed

Elevation:

Site Comments: AKRR MP164.98

Survey Date: Aug 25, 2009

Survey MSB09-ARR02

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. Constriction ratio gray
  3. Compound gradient in pipe

Comments: Pipes bent up in middle; velocity slow at inlet, riffle at outlet; pipe const is CSP at inlet, SSP at outlet

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 103.8
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 2
Approach Angle: 18.0
Sedimentation At Inlet: No
Inlet Substrate: Gravel
Outlet Substrate: None
InletOutlet
Width(ft):2.0 2.0
Height(ft):1.9 1.9
Apron Length(ft):
Water Depth(ft): 0.3
Rustline Height(ft):0.7
Substrate Depth(ft):0.1 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.65
Culvert Gradient: 2.38%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient red
  2. Constriction ratio gray
  3. Compound gradient in pipe
ID: 2 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 104.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 2
Approach Angle: 18.0
Sedimentation At Inlet: No
Inlet Substrate: Gravel
Outlet Substrate: None
InletOutlet
Width(ft):2.0 2.2
Height(ft):1.7 1.6
Apron Length(ft):
Water Depth(ft): 0.17
Rustline Height(ft):0.5
Substrate Depth(ft):0.3 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.65
Culvert Gradient: 2.45%
Max Slope:
Max Slope Length:
 

Comments: pipe bent at outlet; bent up in middle, water velocity slow at inlet, riffle at outlet; CSP at inlet, SSP at outlet
  Culvert Observations:
  1. Culvert gradient red
  2. Constriction ratio gray
  3. Compound gradient in pipe

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:Silt/ClaySilt/Clay
Subdominant:GravelGravel
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 30.0 3.50
Upstream ordinary high water 65.0 4.50
Upstream ordinary high water 100.0 5.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Outlet Pool Water Elev 1 95.86
Outlet Pool Water Elev 2 95.87
U/S Headwater (pool immed. u/s) 1 98.50
U/S Headwater 2 98.52
D/S Water Surface Elev (@GP) 0.00 33.0 95.76
D/S Grade Ctrl (Thalweg) (~GP on mud) 0.00 33.0 95.06
D/S Water Surface Elev (@GP) 16.00 17.0 95.81
D/S Grade Ctrl (Thalweg) (~GP on mud) 16.00 17.0 94.79
D/S Thalweg 28.00 5.0 95.34
Outlet Invert 1 33.00 0.0 95.56
Outlet Invert 2 33.00 0.0 95.70
Road Elev ((railroad)) 84.50 102.98
Inlet Culvert Invert 1 136.80 0.0 98.03
Inlet Culvert Invert 2 137.00 0.0 98.25

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): 1.25
Comments: no fish caught; 60ft u/s
 
Gear Type: Minnow Trap (B) Trap Duration(h): 1.25
Comments: no fish caught; 60ft d/s

Fish Observations

No fish observations occurred during this survey.

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