Fish Passage Site 20400596

Coordinates (dec. deg.): 61.48972°, -148.91217°
Legal Description: S016N003E09
Region: South Central
Road Name: Knik River Road

Datum: NAD83
Quad Name / ITM: Anchorage B-6
AWC Stream #:
Stream Name:

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-MS009

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

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Outfall height red
  2. Constriction ratio gray

Comments: None

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 49.91
Inlet Type: Flared Inlet
Outlet Type: Flared Inlet
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 3.0
Condition Rating(1-5): 4
Approach Angle: 17.0
Sedimentation At Inlet: No
Inlet Substrate: Gravel
Outlet Substrate: Gravel
InletOutlet
Width(ft):2.5 3.5
Height(ft):2.5 2.5
Apron Length(ft):3.8
Water Depth(ft): 0.21
Rustline Height(ft):0.4
Substrate Depth(ft):0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.65
Outfall Type: Free Fall In To Pool
Constriction Ratio: 0.7
Culvert Gradient: 0.62%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Outfall height red
  2. Constriction ratio gray

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:SandSand
Subdominant:GravelGravel
Stream Slope(deg.):1.77
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 17.0 2.90
Downstream ordinary high water 38.0 3.00
Downstream ordinary high water 74.0 4.80

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 100.44
D/S Thalweg 0.00 93.86
D/S Water Surface Elev 0.00 94.23
D/S Thalweg 38.00 94.79
D/S Water Surface Elev 38.00 95.13
D/S Thalweg 75.00 95.59
D/S Water Surface Elev 75.00 96.23
Misc. (Bottom of apron) 96.00 96.24
D/S Water Surface Elev 99.00 96.43
Outlet Invert 99.00 96.22
Outlet Culvert Top 99.00 96.22
Inlet Culvert Invert 148.91 96.53
U/S Water Surface Elev 148.91 96.81
Inlet Culvert Top 148.91 99.04
Misc. (Bottom of apron) 152.71 96.69
U/S Thalweg 180.91 97.15
U/S Water Surface Elev 180.91 96.06
U/S Water Surface Elev 199.91 96.43
U/S Thalweg 199.91 96.22
U/S Thalweg 222.91 96.56
U/S Water Surface Elev 222.91 222.91

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