Fish Passage Site 20501153

Coordinates (dec. deg.): 61.59099°, -149.74123°
Legal Description: S017N003W01
Region: South Central
Road Name: Trail

Datum: NAD83
Quad Name / ITM: Anchorage C-8
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-MS124

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:
Backwatered:

Step Pools:
Construction Year:


Site Observations:

  1. Constriction ratio gray
  2. Culvert gradient red

Comments: Inlet fed by stream/culvert under railroad. Culvert sagging in middle slightly.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 16.12
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 3.0
Condition Rating(1-5): 4
Approach Angle: 5.0
Sedimentation At Inlet: No
Inlet Substrate: Gravel
Outlet Substrate: Cobble
InletOutlet
Width(ft):1.9 2.0
Height(ft):1.6 1.1
Apron Length(ft):
Water Depth(ft):0.0 0.52
Rustline Height(ft):0.9
Substrate Depth(ft):1.4 1.6
Backwatered?: No
Baffles Present: No
Embedded?: Yes
Embedded Depth(ft): 1.6
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.58
Culvert Gradient: 1.49%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Constriction ratio gray
  2. Culvert gradient gray

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:SandSand
Subdominant:OrganicOrganic
Stream Slope(deg.):2.17
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 60.0 3.40
Upstream ordinary high water 72.0 3.30
Upstream ordinary high water 86.0 3.20
Upstream ordinary high water 105.0 3.20

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 98.51
U/S Water Surface Elev 0.00 99.45
U/S Thalweg 0.00 98.51
U/S Water Surface Elev 10.00 98.42
U/S Thalweg 10.00 97.46
U/S Water Surface Elev 100.00 97.53
Inlet Culvert Invert 100.00 96.67
Inlet Culvert Top 100.00 98.02
Outlet Invert 116.12 96.66
D/S Water Surface Elev 116.12 97.18
Outlet Culvert Top 116.12 97.78
D/S Thalweg 149.12 95.35
D/S Water Surface Elev 149.12 95.76
D/S Water Surface Elev 177.12 94.89
D/S Thalweg 177.12 94.64
D/S Thalweg 195.12 94.03
D/S Water Surface Elev 195.12 94.83
D/S Thalweg 216.12 93.84
D/S Water Surface Elev 216.12 94.77

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