Fish Passage Site 20401363

Coordinates (dec. deg.): 61.57583°, -149.29483°
Legal Description: S017N001E09
Region: South Central
Road Name: Private drive near Hyer Road

Datum: NAD83
Quad Name / ITM: Anchorage C-7
AWC Stream #: 247-50-10260-2019-3041
Stream Name: Wasilla Creek tributary

Elevation:

Site Comments: culvert through abandoned roadbed.

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-WA090

Observers: Edward Weiss, Olof Jacobsson

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools:
Construction Year:


Site Observations:

  1. Outfall height red
  2. Culvert gradient red
  3. Mechanical damage or joints parting
  4. Improper bedding

Comments: Site 050 (D1/U1) is 80' upstream - juvenile coho abundant at site 050. culvert through abandoned roadbed. Pipe is damaged resulting in 2 distinct grades through the pipe. Inlet end is tipped up severely. Roadbed is caving in over culvert. Landowner had 8 in plywood sheet blocking inlet to create "duck pond" upstream.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated Metal) Fish Passage Rating: Red
 
Length(ft): 40.5
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: Sand
Outlet Substrate: Sand
InletOutlet
Width(ft):3.0 3.0
Height(ft):3.0 3.0
Apron Length(ft):
Water Depth(ft):0.4 0.2
Rustline Height(ft):
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height:
Outfall Type: Free Fall In To Pool
Constriction Ratio: 0.5
Culvert Gradient: 4.52%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Mechanical damage or joints parting
  2. Improper bedding
  3. Outfall height red
  4. Culvert gradient gray

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:SandSand
Subdominant:
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 44.0 7.00
Downstream ordinary high water 100.0 5.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Outlet Culvert Top 1 94.12
Inlet Culvert Top 1 95.83
D/S Thalweg 0.00 100.0 88.01
D/S Thalweg 56.00 44.0 90.28
D/S Tailcrest or 1st Thalweg 95.00 5.0 90.66
OHW Left Bank 96.00 4.0 90.26
D/S Thalweg 97.80 2.2 89.79
Max Pool Depth 98.70 1.3 89.98
Outlet Thalweg 1 100.00 0.0 90.51
Outlet Invert 1 100.00 0.0 91.07
Road Elev 120.00 95.16
Inlet Thalweg 1 140.00 0.0 91.77
Inlet Culvert Invert 1 140.00 0.0 92.90
U/S Thalweg 1 144.20 4.2 91.29
U/S Thalweg 195.00 55.0 91.05
U/S Thalweg 223.00 83.0 90.20

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: Visual Observation, Ground (C)
 
Gear Type: Visual Observation, Ground (D) Trap Duration(h): 20

Fish Observations

Species: juvenile coho salmon Life History: Anadromous
Total Fish Observed: Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: Upstream Visual Observation, Ground ()  
 
Species: adult sockeye salmon Life History: Anadromous
Total Fish Observed: Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: Downstream Visual Observation, Ground ()  

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