Fish Passage Site 20501241

Coordinates (dec. deg.): 61.76481°, -149.61507°
Legal Description: S019N002W03
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: 4.09' to Willow Creek

Survey Date: Jul 29, 2009

Survey MSB09-WFR03

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. Outfall height red
  2. Culvert gradient red
  3. Compound gradient in pipe
  4. Shallow fill; inadequate roadfill volume above culvert

Comments: U/s flows in ditch beside road; pipe badly bent at inlet; OH = 0.26' to TWS, 4.09' to Willow Creek

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 44.8
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 2
Approach Angle: 95.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):3.1 3.0
Height(ft):2.0 3.0
Apron Length(ft):
Water Depth(ft): 0.13
Rustline Height(ft):1.2
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.26
Outfall Type: Free Fall In To Pool
Constriction Ratio:
Culvert Gradient: 3.10%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Outfall height red
  2. Culvert gradient red
  3. Compound gradient in pipe
  4. Shallow fill; inadequate roadfill volume above culvert

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelCobble
Subdominant:SandSand
Stream Slope(deg.):
Stream Flow Stage:Medium

No stream width data available.

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Outlet Pool Water Elev 1 95.56
U/S Headwater (pool immed. u/s of inlet) 1 97.37
D/S Water Surface Elev (WS of Willow Cr) 1 0.00 10.0 91.73
D/S Thalweg (lip of drop over rip-rap to Willow Cr) 1 3.00 7.0 95.05
D/S Thalweg (riffle to 7') 1 10.00 0.0 95.22
Outlet Invert 1 10.00 0.0 95.69
Road Elev 1 32.00 103.37
Inlet Culvert Invert 1 54.80 0.0 97.08

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; 400ft u/s

Fish Observations

No fish observations occurred during this survey.

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