Fish Passage Site 20401329

Coordinates (dec. deg.): 61.61172°, -149.23756°
Legal Description: S018N001E35
Region: South Central
Road Name: Private Drive

Datum: NAD83
Quad Name / ITM: Anchorage C-6
AWC Stream #: 247-50-10260-2019-3066
Stream Name: Wasilla Creek tributary

Elevation:

Site Comments: Small tributary drainage located on a private driveway to a gravel pit off of Colony School Drive.

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-WA021

Observers: Edward Weiss, Olof Jacobsson, Joe Conner

Overall Fish Passage Rating: Gray

Tidal: No
Backwatered: No

Step Pools:
Construction Year:


Comments: T16 violation at culvert inlet. Inlet blocked by 1.88 ft of wooden boards. Juvenile blockage indicated by fish above, small below. 0.4 ft open space. No Velocities due to inlet blockage (violation). Need to come back and reassess after work out a fix

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated Metal) Fish Passage Rating:
 
Length(ft): 38.0
Inlet Type: Projecting
Outlet Type:
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): 0.5
Rustline Height(ft):
Substrate Depth(ft): 0.0
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height:
Outfall Type:
Constriction Ratio:
Culvert Gradient: 0.55%
Max Slope:
Max Slope Length:

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:SandSand
Subdominant:
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 Culvert Top 1 92.99
Inlet Culvert Top 1 93.61
Outlet Invert 1 0.00 0.0 90.10
Outlet Thalweg 1 0.00 0.0 90.22
Road Elev 19.00 94.62
Road Elev 19.00 94.76
Inlet Culvert Invert 1 38.00 0.0 90.31
U/S Thalweg 1 39.00 1.0 91.45

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: juvenile coho salmon Life History: Anadromous
Total Fish Observed: 29 Fish Measured: 14 Fork Lengths (mm) Min: 48 Max: 112 Mean: 72
Collected/Observed by Gear Type: Downstream Minnow Trap (21)  Upstream Minnow Trap (8)  

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