Fish Passage Site 20501236

Coordinates (dec. deg.): 61.77345°, -149.32980°
Legal Description: S020N001E32
Region: South Central
Road Name: Upper Willow Road

Datum: WGS84
Quad Name / ITM: Anchorage D-7
AWC Stream #:
Stream Name: Upper Willow Creek

Elevation:

Site Comments: None

Survey Date: Sep 10, 2009

Survey MSB09-UWR01

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. Outfall height gray
  3. Constriction ratio red
  4. Culvert is poorly aligned
  5. Mechanical damage or joints parting

Comments: Pipe is collapsed in middle, and has hydraulic jump (drop over rocks).

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 38.1
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 1
Approach Angle: 45.0
Sedimentation At Inlet: Yes
Inlet Substrate: Sand
Outlet Substrate: None
InletOutlet
Width(ft):3.9 4.0
Height(ft):3.5 2.8
Apron Length(ft):
Water Depth(ft): 0.48
Rustline Height(ft):1.6
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: 0.27
Culvert Gradient: 5.12%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient red
  2. Constriction ratio red
  3. Culvert is poorly aligned
  4. Mechanical damage or joints parting
ID: 2 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 40.4
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 3
Approach Angle: 45.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):4.0 4.0
Height(ft):4.0 2.9
Apron Length(ft):
Water Depth(ft): 0.61
Rustline Height(ft):2.1
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.25
Outfall Type: Free Fall In To Pool
Constriction Ratio: 0.27
Culvert Gradient: 3.00%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient red
  2. Outfall height gray
  3. Constriction ratio red
  4. Culvert is poorly aligned
  5. Mechanical damage or joints parting

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:CobbleCobble
Subdominant:GravelGravel
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 80.0 16.00
Upstream ordinary high water 165.0 23.00
Upstream ordinary high water 220.0 22.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Outlet Pool Water Elev 1 95.04
Outlet Pool Water Elev 2 95.20
U/S Headwater (turbulent) 2 96.63
U/S Headwater 1 96.91
D/S Grade Ctrl (Thalweg) (both pipes) 0.00 13.0 94.49
D/S Water Surface Elev (@GP) 0.00 13.0 94.92
D/S Water Surface Elev (@ pipe 2 TWC) 2 5.00 5.0 95.19
D/S Tailcrest or 1st Thalweg (pipe 2 only TWC) 2 8.00 5.0 94.66
D/S Tailcrest or 1st Thalweg (pipe 1 only TWC) 1 10.00 3.0 94.60
D/S Water Surface Elev (WS @ pipe 1 TWC) 1 10.00 3.0 95.04
D/S Thalweg (bottom of outlet pool pipe 2) 2 11.50 2.5 94.25
D/S Thalweg (bottom of out pool Pipe 1) 1 11.80 1.2 94.28
D/S Thalweg 2 13.00 0.0 94.32
Outlet Invert 1 13.00 0.0 94.56
Outlet Invert 2 13.00 0.0 94.84
Road Elev 33.00 102.13
Inlet Culvert Invert 1 51.10 0.0 96.51
Inlet Culvert Invert 2 53.40 0.0 96.05
U/S Thalweg (u/s grade change) 72.40 19.0 97.81
U/S Grade Ctrl (Thalweg) (1st TC u/s in thalweg (side pools lower)) 87.40 34.0 99.01
D/S Water Surface Elev (@GP) 87.40 34.0 99.72

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; 150ft u/s
 
Gear Type: Minnow Trap (B) Trap Duration(h): 1.0
Comments: no fish caught; 150ft d/s

Fish Observations

No fish observations occurred during this survey.

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