Fish Passage Site 20501249

Coordinates (dec. deg.): 61.76489°, -149.55006°
Legal Description: S019N002W01
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

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-WFR11

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. Outfall height gray

Comments: None

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 30.2
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 3
Approach Angle: 25.0
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):3.0 3.0
Height(ft):3.0 3.0
Apron Length(ft):
Water Depth(ft): 0.29
Rustline Height(ft):1.2
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.16
Outfall Type: Free Fall In To Pool
Constriction Ratio: 0.6
Culvert Gradient: 1.49%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient red
  2. Constriction ratio gray
  3. Outfall height gray

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:CobbleCobble
Subdominant:SandSand
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 77.0 5.50
Upstream ordinary high water 161.0 5.50
Upstream ordinary high water 192.0 4.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Outlet Pool Water Elev 1 97.06
U/S Headwater 1 97.98
D/S Water Surface Elev (@GP) 1 0.00 35.0 96.83
D/S Grade Ctrl (Thalweg) 1 0.00 35.0 96.41
D/S Tailcrest or 1st Thalweg 1 16.00 19.0 96.66
D/S Water Surface Elev (@TWC) 1 16.00 19.0 97.06
D/S Thalweg (bottom of pool) 1 29.00 6.0 95.34
D/S Thalweg 1 35.00 0.0 96.39
Outlet Invert 1 35.00 0.0 96.93
Road Elev 1 50.00 101.37
Inlet Culvert Invert 1 65.20 0.0 97.38
U/S Grade Ctrl (Thalweg) 1 65.70 0.5 97.41
U/S Water Surface Elev (@GP) 1 65.70 0.5 98.01

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): 0.75
Comments: no fish caught; 85ft u/s
 
Gear Type: Minnow Trap (B) Trap Duration(h): 0.75
Comments: 120ft d/s

Fish Observations

Species: juvenile Dolly Varden Life History: Not Recorded
Total Fish Observed: 1 Fish Measured: 1 Fork Lengths (mm) Min: 72 Max: 72 Mean: 72
Collected/Observed by Gear Type: Upstream Minnow Trap (1)  

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