Fish Passage Site 20502089

Coordinates (dec. deg.): 62.82663°, -149.63768°
Legal Description: S032N002W34
Region: South Central
Road Name: Alaska Railroad

Datum: NAD83
Quad Name / ITM: Talkeetna Mts D-6
AWC Stream #:
Stream Name: Indian River tributary

Elevation:

Site Comments: RR MP 268.8

Survey Date: Jun 16, 2011

Survey MSB11-ARR203

Project Supervisor: Gillian O'Doherty, Alaska Department of Fish and Game — Anchorage, AK
Observers: John Greuey, Abraham Gioffre

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: Yes

Step Pools: No
Construction Year: 2004


Site Observations:

  1. Culvert gradient gray
  2. Structural Problem
  3. Mechanical damage or joints parting

Comments: Alaska Railroad site at MP 268.8. Culvert is bent and caved in at a few points. Outlet is heavily embedded and actual bottom not found by driving a stake into substrate.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Gray
 
Length(ft): 50.48
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle: 50.0
Sedimentation At Inlet: Yes
Inlet Substrate: Gravel
Outlet Substrate: Gravel
InletOutlet
Width(ft):9.2 8.9
Height(ft):7.25 5.1
Apron Length(ft):0.0 0.0
Water Depth(ft): 0.76
Rustline Height(ft):0.5
Substrate Depth(ft):1.9 4.0
Backwatered?: Yes
Baffles Present: No
Embedded?: Yes
Embedded Depth(ft): 1.9
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 1.05
Culvert Gradient: 5.05%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient gray
  2. Structural Problem
  3. Mechanical damage or joints parting

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:SandSand
Stream Slope(deg.):1.76
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 40.0 9.40
Downstream ordinary high water 60.0 7.80
Downstream ordinary high water 100.0 9.20

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Grade Ctrl (Thalweg) (Resting pool before grade change.) 0.00 88.90
D/S Water Surface Elev 0.00 89.20
D/S Grade Ctrl (Thalweg) (Top of riffle) 30.00 89.24
D/S Water Surface Elev 30.00 89.51
D/S Grade Ctrl (Thalweg) (Top of continuous riffle) 91.00 90.57
D/S Water Surface Elev 91.00 90.80
D/S Water Surface Elev (Water surface at outlet) 101.00 90.84
Outlet Culvert Top 101.00 95.33
Outlet Invert (On substrate) 101.00 90.08
Road Elev (Center of railroad tracks) 126.00 99.89
Inlet Culvert Top 151.48 97.88
U/S Water Surface Elev (Water surface at inlet) 151.48 90.86
Inlet Culvert Invert (On substrate) 151.48 89.65
U/S Grade Ctrl (Thalweg) (Top of riffle) 166.48 91.56
U/S Water Surface Elev 166.48 91.73

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