Fish Passage Site 20401881

Coordinates (dec. deg.): 61.71913°, -149.10321°
Legal Description: S019N002E21
Region: South Central
Road Name: Samovar Way

Datum: NAD83
Quad Name / ITM: Anchorage C-6
AWC Stream #:
Stream Name: Wasilla Creek tributary

Elevation:

Site Comments: Culvert installed by MSB in 1999.

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-WA041

Observers: Edward Weiss, Doug Hill, Joe Conner, Dennis Gnath

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools:
Construction Year: 1999


Site Observations:

  1. Culvert is poorly aligned
  2. Other, including vibrations, cavitation, etc.
  3. Culvert gradient red

Comments: Culvert installed by MSB in 1999. Skewed with road. Channel changed above/below as part of the project. New portion eroding/settling could impact stream.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated Metal) Fish Passage Rating: Red
 
Length(ft): 80.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5):
Approach Angle:
Sedimentation At Inlet:
Inlet Substrate: Gravel
Outlet Substrate: Gravel
InletOutlet
Width(ft):4.0 4.0
Height(ft):4.0 3.3
Apron Length(ft):
Water Depth(ft):0.5 0.3
Rustline Height(ft):
Substrate Depth(ft):0.0 0.7
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height:
Outfall Type: At Stream Grade
Constriction Ratio: 1.23
Culvert Gradient: 5.24%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert is poorly aligned
  2. Other, including vibrations, cavitation, etc.
  3. Culvert gradient red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 49.0 4.00
Downstream ordinary high water 100.0 6.00
Upstream ordinary high water 45.0 3.50
Upstream ordinary high water 100.0 3.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Thalweg 74.42
Outlet Culvert Top 1 85.46
Inlet Culvert Top 1 90.20
U/S Thalweg 95.84
D/S Thalweg 0.00 49.0 77.87
D/S Tailcrest or 1st Thalweg 43.30 5.7 81.89
D/S Thalweg 45.20 3.8 81.81
Outlet Invert 1 49.00 0.0 82.01
Outlet Thalweg 1 49.00 0.0 82.01
Road Elev 89.00 92.92
Road Elev 89.00 87.78
Inlet Culvert Invert 1 129.00 0.0 86.20
Inlet Thalweg 1 129.00 0.0 86.22
U/S Thalweg 1 130.60 1.6 87.11
U/S Thalweg 174.00 45.0 89.98

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
 
Gear Type: Minnow Trap (B) Trap Duration(h): 1

Fish Observations

Species: no fish collected or observed Life History: Not Applicable
Total Fish Observed: 0 Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: Downstream Minnow Trap (0)  Upstream Minnow Trap (0)  

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