Fish Passage Site 20503950

Coordinates (dec. deg.): 61.44940°, -149.75890°
Legal Description: S016N003W26
Region: South Central
Road Name: Knik-Goose Bay Road

Datum: WGS84
Quad Name / ITM: Anchorage B-8
AWC Stream #:
Stream Name: Unnamed

Elevation:

Site Comments: None

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 MSB23-MS033

Project Supervisor: Michael Mazzacavallo, Alaska Department of Fish and Game — Anchorage, AK
Observers: Michael Mazzacavallo, Kat Leavitt, Beth Evers

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert gradient gray

Comments: Fish spotted upstream and downstream

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 188.5
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle: 35.0
Sedimentation At Inlet: No
Inlet Substrate: Gravel
Outlet Substrate: Gravel
InletOutlet
Width(ft):3.93 3.92
Height(ft):3.96 2.55
Apron Length(ft):
Water Depth(ft):0.0 0.17
Rustline Height(ft):0.47
Substrate Depth(ft):0.0 1.17
Backwatered?: No
Baffles Present: No
Embedded?: No
Embedded Depth(ft): 0.0
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.89
Culvert Gradient: 3.20%
Max Slope:
Max Slope Length:
 

Comments: Sagging top thorugh the middle. Projecting with headwall (debris control only)
  Culvert Observations:
  1. Culvert gradient red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:SandSand
Subdominant:GravelGravel
Stream Slope(deg.):3.06
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 27.0 5.60
Upstream ordinary high water 50.0 5.10
Upstream ordinary high water 69.0 3.80
Upstream ordinary high water 96.0 3.20

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 111.23
U/S Water Surface Elev 8.00 86.85
U/S Thalweg 8.00 86.01
U/S Thalweg 42.00 85.35
U/S Water Surface Elev 42.00 85.67
U/S Thalweg 66.00 84.36
U/S Water Surface Elev 66.00 84.83
Inlet Culvert Invert 100.00 82.77
U/S Water Surface Elev 100.00 83.18
Inlet Culvert Top 100.00 86.81
Outlet Invert 288.50 78.22
D/S Water Surface Elev 288.50 78.39
Outlet Culvert Top 288.50 80.78
D/S Water Surface Elev 311.50 76.46
D/S Thalweg 311.50 77.04
D/S Thalweg 362.50 75.96
D/S Water Surface Elev 362.50 76.25
D/S Thalweg 387.50 74.60
D/S Water Surface Elev 387.50 75.22

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

No fish sampling occurred during this survey.

Fish Observations

No fish observations occurred during this survey.

Questions or comments about this report can be directed to dfg.dsf.webmaster@alaska.gov