Fish Passage Site 20502096

Coordinates (dec. deg.): 62.96044°, -149.65257°
Legal Description: F022S011W33
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: RRMP 280.81

Survey Date: Jun 13, 2011

Survey MSB11-ARR01

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. Structural Problem

Comments: No corrugations, culvert is concrete.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Reinforced concrete) Fish Passage Rating: Gray
 
Length(ft): 32.23
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.):
Corrugation Width(in.):
Condition Rating(1-5): 2
Approach Angle: 67.0
Sedimentation At Inlet: No
Inlet Substrate: Cobble
Outlet Substrate: Cobble
InletOutlet
Width(ft):3.02 3.02
Height(ft):2.74 2.42
Apron Length(ft):0.0 0.0
Water Depth(ft): 0.18
Rustline Height(ft):0.75
Substrate Depth(ft):0.34 0.25
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 1.03
Culvert Gradient: 2.04%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Mechanical damage or joints parting
  2. Structural Problem

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 10.0 3.15
Downstream ordinary high water 24.0 3.10
Downstream ordinary high water 31.0 2.50

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 91.74
D/S Water Surface Elev (Used for stream gadient) 0.00 91.91
D/S Grade Ctrl (Thalweg) (Top of riffle. Fall into pool.) 10.00 92.46
D/S Water Surface Elev 10.00 92.67
Outlet Pool Water Elev (Used for stream gradiient) 32.00 92.68
Max Pool Depth 32.00 92.23
D/S Water Surface Elev (Water surface at outlet) 44.00 92.73
Outlet Culvert Top 44.00 95.11
Outlet Invert 44.00 92.55
Road Elev (Railroad tracks. Center of tracks.) 60.00 99.32
Inlet Culvert Top 76.30 95.77
U/S Water Surface Elev (Water surface at inlet) 76.30 93.10
Inlet Culvert Invert 76.30 92.53
U/S Grade Ctrl (Thalweg) (Top of riffle) 96.30 93.55
U/S Water Surface Elev 96.30 93.63

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