Fish Passage Site 20502093

Coordinates (dec. deg.): 62.96744°, -149.64742°
Legal Description: F022S011W34
Region: South Central
Road Name: Alaska Railroad

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

Elevation:

Site Comments: Alaska RR MP 280.69

Survey Date: Jun 13, 2011

Survey MSB11-ARR02

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

Overall Fish Passage Rating: Gray

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Constriction ratio gray
  2. Mechanical damage or joints parting

Comments: Alaska RR MP 280.69 New site. Culvert had misaligned joints and some concrete corrosion. Inlet and outlet areas contained crushed granite rock.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Reinforced concrete) Fish Passage Rating: Gray
 
Length(ft): 42.92
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.):
Corrugation Width(in.):
Condition Rating(1-5): 3
Approach Angle: 56.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):2.95 3.0
Height(ft):3.0 3.1
Apron Length(ft):0.0 0.0
Water Depth(ft): 0.05
Rustline Height(ft):0.58
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Embedded Depth(ft): 0.0
Outfall Height: 0.27
Outfall Type: Free Fall In To Pool
Constriction Ratio: 0.56
Culvert Gradient: 2.42%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Constriction ratio gray
  2. Mechanical damage or joints parting

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:CobbleCobble
Subdominant:GravelGravel
Stream Slope(deg.):
Stream Flow Stage:Low
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 26.0 6.00
Downstream ordinary high water 29.0 4.70
Downstream ordinary high water 40.0 5.50

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Grade Ctrl (Thalweg) (Below riffle) 0.00 87.06
D/S Water Surface Elev 0.00 87.36
D/S Tailcrest or 1st Thalweg (Tail water control) 18.00 88.19
D/S Water Surface Elev (Tail water surface) 18.00 88.35
Outlet Pool Water Elev 40.00 88.37
Outlet Invert (On pipe) 40.00 88.59
D/S Water Surface Elev (Water surface at outlet) 40.00 88.64
Max Pool Depth (Outlet pool substrate) 40.00 88.10
Outlet Culvert Top 40.00 91.99
Road Elev (Center of railroad tracks.) 61.00 99.44
Inlet Culvert Top 82.90 92.92
Inlet Culvert Invert (On pipe) 82.90 89.63
U/S Water Surface Elev (Water surface at inlet) 82.90 89.70
U/S Grade Ctrl (Thalweg) 97.90 89.91
U/S Water Surface Elev 97.90 90.21

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