Fish Passage Site 20501252

Coordinates (dec. deg.): 61.76332°, -149.48238°
Legal Description: S019N001W05
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 09, 2009

Survey MSB09-WFR14

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 gray
  4. Shallow fill; inadequate roadfill volume above culvert

Comments: Unmapped stream; DV caught u/s.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 30.5
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 4
Approach Angle: 13.0
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):2.0 2.0
Height(ft):2.0 2.0
Apron Length(ft):
Water Depth(ft): 0.09
Rustline Height(ft):0.4
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.24
Outfall Type: Free Fall In To Pool
Constriction Ratio: 0.63
Culvert Gradient: 2.85%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient red
  2. Outfall height gray
  3. Constriction ratio gray
  4. Shallow fill; inadequate roadfill volume above culvert

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:SandGravel
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 50.0 3.50
Upstream ordinary high water 90.0 3.00
Upstream ordinary high water 115.0 3.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Outlet Pool Water Elev 1 96.92
U/S Headwater (pool immed. u/s of inlet) 1 98.11
D/S Grade Ctrl (Thalweg) 1 0.00 12.0 96.73
D/S Water Surface Elev (@GP) 1 0.00 12.0 96.92
D/S Tailcrest or 1st Thalweg 1 9.50 2.5 96.79
D/S Water Surface Elev (@TWC) 1 9.50 2.5 96.91
D/S Thalweg (pool bottom) 1 10.50 1.5 96.57
Outlet Invert 1 12.00 0.0 97.07
Road Elev 1 27.00 101.48
Inlet Culvert Invert 1 42.50 0.0 97.94

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: 55ft u/s
 
Gear Type: Minnow Trap (B) Trap Duration(h): 1.0
Comments: no fish caught; 130ft d/s, in Willow Creek

Fish Observations

Species: juvenile Dolly Varden Life History: Not Recorded
Total Fish Observed: 1 Fish Measured: 1 Fork Lengths (mm) Min: 107 Max: 107 Mean: 107
Collected/Observed by Gear Type: Upstream Minnow Trap (1)  

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