Fish Passage Site 20401351

Coordinates (dec. deg.): 61.57254°, -149.30899°
Legal Description: S017N001E08
Region: South Central
Road Name: South Grantham Road

Datum: NAD83
Quad Name / ITM: Anchorage C-7
AWC Stream #: 247-50-10260-2019
Stream Name: Wasilla Creek

Elevation:

Site Comments: Site is now a bridge. South Grantham off Hyer Road.

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 MSCS1-WA047

Observers: Edward Weiss, Olof Jacobsson, Joe Conner

Overall Fish Passage Rating: Gray

Tidal: No
Backwatered: No

Step Pools:
Construction Year:


Comments: Channel upstream and downstream primarily sand with FG riffles. 1. Fine road sediments (sands) running down embankment w/rains into stream. Rip-rap outlet cascade pushes outlet pool DS > 3cmp diams. 2. Outlet pool eddies before taking erosional bank.

Culvert Measurements

ID: 1 Structure Type: Open-bottom arch (Corrugated Metal) Fish Passage Rating:
 
Length(ft): 41.0
Inlet Type: Projecting
Outlet Type:
Corrugation Depth(in.): 2.0
Corrugation Width(in.): 6.0
Condition Rating(1-5):
Approach Angle:
Sedimentation At Inlet:
Inlet Substrate: Sand
Outlet Substrate: Sand
InletOutlet
Width(ft):11.0
Height(ft):5.0
Apron Length(ft):
Water Depth(ft):1.6 1.35
Rustline Height(ft):
Substrate Depth(ft):
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height:
Outfall Type:
Constriction Ratio: 0.67
Culvert Gradient:
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. None of this type

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:SandSand
Subdominant:
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 70.0 19.00
Upstream ordinary high water 100.0 14.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Thalweg 85.66
Inlet Culvert Top 1 93.08
Outlet Culvert Top 1 93.52
U/S Thalweg 88.25
D/S Thalweg 0.00 110.0 87.03
OHW Left Bank 94.00 16.0 86.85
Outlet Thalweg 1 110.00 0.0 88.49
Outlet Invert 1 110.00 0.0 88.10
Road Elev 130.50 94.55
Road Elev 130.50 94.86
Inlet Thalweg 1 151.00 0.0 87.27

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)
 
Gear Type: Visual Observation, Air-Not Recorded (C)
 
Gear Type: Visual Observation, Ground (D)

Fish Observations

Species: juvenile Dolly Varden Life History: Unknown
Total Fish Observed: Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: Upstream Minnow Trap ()  
 
Species: juvenile Chinook salmon Life History: Anadromous
Total Fish Observed: Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: Upstream Minnow Trap ()  
 
Species: juvenile coho salmon Life History: Anadromous
Total Fish Observed: Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: Upstream Minnow Trap ()  
 
Species: adult pink salmon Life History: Anadromous
Total Fish Observed: 1 Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: Downstream Visual Observation, Ground ()  Upstream Visual Observation, Air-Not Recorded (1)  
Comments: adult pink salmon observed in culvert

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