Fish Passage Site 20501420

Coordinates (dec. deg.): 62.25486°, -150.08141°
Legal Description: S025N004W18
Region: South Central
Road Name: Talkeetna Spur Road

Datum: NAD83
Quad Name / ITM: Talkeetna B-1
AWC Stream #: 247-41-10200-2320-3010
Stream Name: Birch Creek

Elevation:

Site Comments: Outlet to Fish Lake.

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 PRK09-TSR01

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

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: Yes

Step Pools: No
Construction Year:


Site Observations:

  1. Outfall height red
  2. Mechanical damage or joints parting

Comments: Resurvey of PRK041A057. Majority of flow is in pipe 2; visual observations of many salmonids u/s of culverts

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Structural steel plate) Fish Passage Rating: Red
 
Length(ft): 143.7
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 2.0
Corrugation Width(in.): 6.0
Condition Rating(1-5): 2
Approach Angle: 33.0
Sedimentation At Inlet: Yes
Inlet Substrate: Cobble
Outlet Substrate: None
InletOutlet
Width(ft):5.4 5.5
Height(ft):6.0 6.2
Apron Length(ft):
Water Depth(ft): 0.72
Rustline Height(ft):2.8
Substrate Depth(ft):0.2 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.35
Outfall Type: Free Fall In To Pool
Constriction Ratio:
Culvert Gradient: 0.30%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Outfall height red
  2. Mechanical damage or joints parting
ID: 2 Structure Type: Circular pipe (Structural steel plate) Fish Passage Rating: Green
 
Length(ft): 141.5
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 2.0
Corrugation Width(in.): 6.0
Condition Rating(1-5): 3
Approach Angle: 45.0
Sedimentation At Inlet: Yes
Inlet Substrate: Cobble
Outlet Substrate: None
InletOutlet
Width(ft):5.5 5.5
Height(ft):6.3 6.3
Apron Length(ft):
Water Depth(ft): 1.8
Rustline Height(ft):3.5
Substrate Depth(ft):0.2 0.0
Backwatered?: Yes
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio:
Culvert Gradient: 0.40%
Max Slope:
Max Slope Length:
 

Comments: Pipe 2 (this pipe) has majority of flow.
  Culvert Observations:
  1. Mechanical damage or joints parting

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:CobbleCobble
Stream Slope(deg.):
Stream Flow Stage:Medium

No stream width data available.

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Outlet Pool Water Elev (turbulence - use 77.01 for TWS) 2 76.98
Outlet Pool Water Elev (outpools too deep to wade >6' WD) 1 77.01
U/S Headwater 1 78.54
U/S Headwater 2 78.56
D/S Water Surface Elev 0.00 83.0 76.87
D/S Grade Ctrl (Thalweg) 0.00 83.0 75.73
D/S Tailcrest or 1st Thalweg (Grade point for main thalweg both pipes) 2 35.00 48.0 76.12
D/S Water Surface Elev (ws @TWC) 2 35.00 48.0 77.01
D/S Tailcrest or 1st Thalweg (29' from pipe 1) 1 54.00 29.0 76.38
D/S Water Surface Elev (ws @ GP) 1 54.00 29.0 77.01
D/S Water Surface Elev (ws @ GP) 2 60.00 23.0 78.63
D/S Water Surface Elev (ws @ GP) 1 78.00 5.0 78.56
Outlet Invert 2 83.00 0.0 75.21
Outlet Invert 1 83.00 0.0 76.64
Road Elev 154.00 101.62
Inlet Culvert Invert 1 225.00 0.0 77.07
Inlet Culvert Invert 2 225.00 0.0 75.78
U/S Grade Ctrl (Thalweg) (5' from pipe 1 1st TC u/s) 1 230.00 5.0 77.93
U/S Thalweg (7' from pipe 2) 2 232.00 7.0 76.58
U/S Grade Ctrl (Thalweg) (main thalweg for site; 23' from pipe 2) 2 248.00 23.0 77.28

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: Visual Observation, Ground (A)
Comments: Juvenile fish observed upstream.

Fish Observations

No fish observations occurred during this survey.

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