Fish Passage Site 20403971

Coordinates (dec. deg.): 61.48410°, -149.12778°
Legal Description: S016N002E08
Region: South Central
Road Name: Old Glenn Highway

Datum: WGS84
Quad Name / ITM: Anchorage B-6
AWC Stream #:
Stream Name: Unnammed Trib to Knik River

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-OLG02

Project Supervisor: Michael Mazzacavallo, Alaska Department of Fish and Game — Anchorage, AK
Observers: Michael Mazzacavallo, Amy LaBarre, Kevin Keith

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: Yes

Step Pools: No
Construction Year: 2020


Comments: Culvert material is smooth plastic

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated plastic) Fish Passage Rating: Green
 
Length(ft): 55.7
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.0
Corrugation Width(in.): 0.0
Condition Rating(1-5): 5
Approach Angle:
Sedimentation At Inlet: No
Inlet Substrate: Sand/Silt/Clay (legacy)
Outlet Substrate: Sand/Silt/Clay (legacy)
InletOutlet
Width(ft):3.5 3.5
Height(ft):3.5 3.5
Apron Length(ft):
Water Depth(ft): 1.49
Rustline Height(ft):
Substrate Depth(ft):
Backwatered?: Yes
Baffles Present: No
Embedded?:
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio:
Culvert Gradient: 1.00%
Max Slope:
Max Slope Length:

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:
Subdominant:
Stream Slope(deg.):
Stream Flow Stage:

No stream width data available.

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Thalweg 0.00 10.0 91.60
D/S Water Surface Elev 0.00 10.0 93.53
Outlet Pool Water Elev 10.00 93.53
Outlet Invert 10.00 92.04
Outlet Invert 10.00 95.91
Inlet Culvert Invert 65.79 91.55
U/S Water Surface Elev 65.79 93.53
Top of Pipe Inlet 65.79 95.34
U/S Thalweg 68.79 3.0 91.81

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