Fish Passage Site 20400627

Coordinates (dec. deg.): 61.47508°, -149.17424°
Legal Description: S016N002E18
Region: South Central
Road Name: Old Glenn Highway

Datum: NAD83
Quad Name / ITM: Anchorage B-6
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-MS013

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. Outfall height red
  2. Culvert gradient gray

Comments: Inlet culvert bent around opening. There is a thaw pipe that follows the length inside the culvert. Outlet does not have apron.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 66.1
Inlet Type: Flared Inlet
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.5
Condition Rating(1-5): 4
Approach Angle:
Sedimentation At Inlet: Yes
Inlet Substrate: Gravel
Outlet Substrate: Cobble
InletOutlet
Width(ft):2.9 3.0
Height(ft):2.6 3.0
Apron Length(ft):3.7
Water Depth(ft):0.0 0.15
Rustline Height(ft):0.5
Substrate Depth(ft):0.7
Backwatered?: No
Baffles Present: No
Embedded?: No
Embedded Depth(ft): 0.0
Outfall Height: 1.8
Outfall Type: Free Fall In To Pool
Constriction Ratio: 0.6
Culvert Gradient: 6.53%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Outfall height red
  2. Culvert gradient gray

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:CobbleCobble
Subdominant:GravelGravel
Stream Slope(deg.):19.3
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 40.0 4.80
Downstream ordinary high water 65.0 4.90
Downstream ordinary high water 97.0 5.35

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 104.38
D/S Thalweg 45.00 85.68
D/S Water Surface Elev 45.00 85.81
D/S Thalweg 66.00 87.78
D/S Water Surface Elev 66.00 88.19
D/S Thalweg 87.00 92.42
D/S Water Surface Elev 87.00 92.85
D/S Water Surface Elev 98.00 94.38
D/S Thalweg 98.00 94.82
Outlet Invert 100.00 96.29
D/S Water Surface Elev 100.00 96.44
Outlet Culvert Top 100.00 99.33
U/S Water Surface Elev 166.10 101.09
Inlet Culvert Invert 166.10 105.00
Inlet Culvert Top 166.10 103.62
U/S Thalweg 180.10 102.27
U/S Water Surface Elev 180.10 102.42
U/S Thalweg 194.10 106.07
U/S Water Surface Elev 194.10 107.23

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