Fish Passage Site 20503427

Coordinates (dec. deg.): 61.73502°, -150.03094°
Legal Description: S019N004W17
Region: South Central
Road Name: Alaska Railroad

Datum: NAD83
Quad Name / ITM: Tyonek C-1
AWC Stream #:
Stream Name: Jack Lake Outlet


Site Comments: MP 184.9

Survey Date: May 11, 2015


Project Supervisor: Gillian O'Doherty, ADFG
Observers: Mark Eisenman, Gillian O'Doherty

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:

Site Observations:

  1. Culvert is poorly aligned

Comments: Nice E type channel both up and downstream.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
Length(ft): 40.85
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.75
Condition Rating(1-5): 3
Approach Angle: 90.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
Width(ft):2.9 3.1
Height(ft):2.1 3.0
Apron Length(ft):
Water Depth(ft): 0.7
Rustline Height(ft):1.3
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.98
Culvert Gradient: 0.27%
Max Slope:
Max Slope Length:

Comments: Inlet damage

  Culvert Observations:
  1. Culvert is poorly aligned

Stream Measurements

Stream SubstratesUpstreamDownstream
Stream Slope(deg.):
Stream Flow Stage:Medium

No stream width data available.


Locator ID Culvert
Distance (ft)1
Distance From
Crossing (ft)2
Elevation (ft)
Outlet Invert (On pipe) 0.00 90.29
Outlet Culvert Top 0.00 93.29
Inlet Culvert Invert (On pipe) 40.85 90.18
Inlet Culvert Top 40.85 93.22


  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