Fish Passage Site 20501247

Coordinates (dec. deg.): 61.76535°, -149.57161°
Legal Description: S019N002W02
Region: South Central
Road Name: Willow Fishhook Road

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

Elevation:

Site Comments: None

Survey Date: Sep 08, 2009

Survey MSB09-WFR09

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. Constriction ratio red
  2. Culvert gradient red
  3. Culvert gradient gray
  4. Shallow fill; inadequate roadfill volume above culvert
  5. Culvert is poorly aligned
  6. Mechanical damage or joints parting

Comments: ~12 cm salmonid (dolly?) obs u/s. **Updated site photos and fish capture information from 9/20/16 site visit from Sampling Unmapped Streams in the MSB project.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 60.5
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 3
Approach Angle: 52.0
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):3.0 3.0
Height(ft):2.9 3.0
Apron Length(ft):
Water Depth(ft): 0.0
Rustline Height(ft):0.1
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height:
Outfall Type:
Constriction Ratio: 0.33
Culvert Gradient: 1.74%
Max Slope:
Max Slope Length:
 

Comments: Pipe is dry.
  Culvert Observations:
  1. Constriction ratio red
  2. Culvert gradient red
  3. Shallow fill; inadequate roadfill volume above culvert
  4. Culvert is poorly aligned
  5. Mechanical damage or joints parting
ID: 2 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 55.9
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.0
Condition Rating(1-5): 2
Approach Angle: 23.0
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):3.8 4.9
Height(ft):5.0 4.9
Apron Length(ft):
Water Depth(ft): 0.63
Rustline Height(ft):1.6
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.33
Culvert Gradient: 0.91%
Max Slope:
Max Slope Length:
 

Comments: Inlet of pipe badly mangled.
  Culvert Observations:
  1. Constriction ratio red
  2. Culvert gradient gray
  3. Shallow fill; inadequate roadfill volume above culvert
  4. Culvert is poorly aligned
  5. Mechanical damage or joints parting

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:GravelCobble
Stream Slope(deg.):
Stream Flow Stage:Low
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 115.0 10.50
Upstream ordinary high water 160.0 12.00
Upstream ordinary high water 200.0 12.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Outlet Pool Water Elev 2 95.81
U/S Headwater 2 96.13
U/S Headwater (3' from inlet end of pipe) 1 96.90
D/S Grade Ctrl (Thalweg) 2 0.00 49.0 94.57
D/S Water Surface Elev (@GP) 2 0.00 49.0 94.79
D/S Tailcrest or 1st Thalweg 2 27.00 22.0 95.36
D/S Water Surface Elev (@TWC) 2 27.00 22.0 95.80
D/S Thalweg (bottom of out pool) 2 42.50 6.5 93.44
D/S Tailcrest or 1st Thalweg (if water present) 1 47.00 2.0 95.64
D/S Thalweg (bottom of dry outlet pool) 1 48.50 0.5 95.25
D/S Thalweg 2 49.00 0.0 94.96
Outlet Invert 2 49.00 0.0 95.18
Outlet Invert 1 49.00 0.0 96.01
Road Elev (over pipe 1) 1 78.00 101.55
Road Elev (over pipe 2) 2 78.00 102.06
Inlet Culvert Invert 2 104.90 0.0 95.69
U/S Thalweg (TC of 1st pool u/s) 2 106.70 1.8 96.12
U/S Water Surface Elev (@GP) 2 106.70 1.8 96.55
Inlet Culvert Invert (dry pipe) 1 109.70 0.0 97.06

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; 100ft u/s; salmonid observed, prob DV

Fish Observations

Species: Life History:
Total Fish Observed: Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type:
 
Species: juvenile/adult sculpin-unspecified Life History: Resident
Total Fish Observed: 3 Fish Measured: 1 Fork Lengths (mm) Min: 69 Max: 69 Mean: 69
Collected/Observed by Gear Type:

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