Fish Passage Site 20502106

Coordinates (dec. deg.): 62.93616°, -149.66583°
Legal Description: S033N002W21
Region: South Central
Road Name: Alaska Railroad

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

Elevation:

Site Comments: RR MP 278.4

Survey Date: Jun 14, 2011

Survey MSB11-ARR349

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

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert gradient red
  2. Woody Debris
  3. Structural Problem

Comments: Site on Alaska RR at MP 278.4. Grate covering inlet. Areas near inlet and outlet contained crushed granite used for RR Fill. Constrcution debris in channel.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 101.5
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.75
Condition Rating(1-5): 2
Approach Angle: 50.0
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):4.8 5.1
Height(ft):5.05 4.8
Apron Length(ft):0.0 0.0
Water Depth(ft): 0.32
Rustline Height(ft):2.4
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Embedded Depth(ft): 0.0
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.81
Culvert Gradient: 4.20%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient red
  2. Woody Debris
  3. Structural Problem

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:CobbleCobble
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 35.0 6.20
Downstream ordinary high water 84.0 6.70
Downstream ordinary high water 110.0 6.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Grade Ctrl (Thalweg) (Top of riffle) 0.00 87.96
D/S Water Surface Elev 0.00 88.19
D/S Grade Ctrl (Thalweg) (middle of continuous riffle) 19.00 88.77
D/S Water Surface Elev 19.00 88.94
D/S Tailcrest or 1st Thalweg (Tail water control) 46.00 90.02
D/S Water Surface Elev (Tail water surface) 46.00 90.30
Max Pool Depth (Outlet pool depth) 58.00 88.22
Outlet Invert 63.00 90.01
D/S Water Surface Elev (Water surface at outlet) 63.00 90.33
Outlet Culvert Top 63.00 94.94
Road Elev (center of railroad tracks) 113.00 123.89
Inlet Culvert Top 164.50 99.14
Inlet Culvert Invert 164.50 94.27
U/S Water Surface Elev (Water surface at inlet) 164.50 94.58
U/S Grade Ctrl (Thalweg) (Top of riffle) 202.50 94.71
U/S Water Surface Elev 202.50 94.94

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