Fish Passage Site 20501255

Coordinates (dec. deg.): 61.76906°, -149.43297°
Legal Description: S019N001W03
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 10, 2009

Survey MSB09-WFR17

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
  5. Road bank erosion

Comments: Unmapped stream; pipe too short; no fish caught.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 20.1
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 3
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): 0.07
Rustline Height(ft):0.6
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.08
Outfall Type: Free Fall In To Pool
Constriction Ratio: 0.71
Culvert Gradient: 7.16%
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
  5. Road bank erosion

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:GravelGravel
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 62.0 4.00
Upstream ordinary high water 125.0 2.50
Upstream ordinary high water 180.0 2.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Outlet Pool Water Elev 1 95.84
U/S Headwater 1 97.45
D/S Grade Ctrl (Thalweg) 1 0.00 22.0 94.52
D/S Water Surface Elev (@GP) 1 0.00 22.0 94.71
D/S Tailcrest or 1st Thalweg 1 15.00 7.0 95.72
D/S Water Surface Elev (@TWC) 1 15.00 7.0 95.83
D/S Thalweg (bottom of outlet pool) 1 19.40 2.6 94.89
D/S Thalweg 1 22.00 0.0 95.51
Outlet Invert 1 22.00 0.0 95.85
Road Elev 1 32.00 100.44
Inlet Culvert Invert 1 42.10 0.0 97.29
U/S Grade Ctrl (Thalweg) (1st TC u/s) 1 43.70 1.6 97.41
U/S Water Surface Elev 1 43.70 1.6 97.59

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
 
Gear Type: Minnow Trap (B) Trap Duration(h): 1.0
Comments: no fish caught; 100ft d/s

Fish Observations

No fish observations occurred during this survey.

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