Fish Passage Site 20501801

Coordinates (dec. deg.): 62.10559°, -150.06868°
Legal Description: S023N004W06
Region: South Central
Road Name: Alaska Railroad

Datum: NAD83
Quad Name / ITM: Talkeetna A-1
AWC Stream #:
Stream Name: Little Montana Creek


Site Comments: ARR milepost 211.15; Montana Creek side channel.

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.


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: 2014

Comments: Beautiful habitat upstream and downstream of culvert. Fish observed upstream.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
Length(ft): 60.5
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.0
Condition Rating(1-5): 5
Approach Angle: 33.0
Sedimentation At Inlet: No
Inlet Substrate: Sand
Outlet Substrate: Gravel
Width(ft):7.9 7.9
Height(ft):7.0 6.4
Apron Length(ft):
Water Depth(ft): 0.6
Rustline Height(ft):
Substrate Depth(ft):1.0 1.6
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 1.91
Culvert Gradient: 0.17%
Max Slope:
Max Slope Length:

Comments: Culvert not technically embedded and set a little high, but there is substrate throughout barrel.

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)
D/S Grade Ctrl (Thalweg) 0.00 83.03
D/S Water Surface Elev 0.00 83.69
D/S Water Surface Elev (Pool Water surface) 11.00 83.66
Max Pool Depth 11.00 79.72
D/S Water Surface Elev 18.00 83.91
D/S Thalweg (End of rocky ramp) 18.00 84.44
Outlet Invert (On substrate) 64.00 84.49
D/S Water Surface Elev 64.00 85.09
Outlet Culvert Top 64.00 91.08
Inlet Culvert Top 124.50 91.18
U/S Water Surface Elev 124.50 85.34
Inlet Culvert Invert 124.50 84.18
U/S Water Surface Elev 236.50 85.38


  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