Fish Passage Site 20501808

Coordinates (dec. deg.): 62.50270°, -150.10240°
Legal Description: S028N005W24
Region: South Central
Road Name: Alaska Railroad

Datum: NAD83
Quad Name / ITM: Talkeetna C-1
AWC Stream #:
Stream Name: Susitna River tributary

Elevation:

Site Comments: None

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.

Survey MSB11-ARR58

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. Outfall height red
  2. Culvert gradient red

Comments: Alaska Railroad site with GIS FID # 58 at MP 239.55. Two parallel pipes in stream to convey an unnamed trib directly to Susitna River. Very thick brush/woods upst and dwst of site.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 49.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle: 55.0
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):4.1 4.05
Height(ft):3.9 3.87
Apron Length(ft):0.0 0.0
Water Depth(ft): 0.04
Rustline Height(ft):1.4
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Embedded Depth(ft): 0.0
Outfall Height: 0.38
Outfall Type: Free Fall In To Pool
Constriction Ratio: 1.52
Culvert Gradient: 1.67%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Outfall height red
  2. Culvert gradient gray
ID: 2 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 48.8
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle: 305.0
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):4.25 4.15
Height(ft):3.73 3.78
Apron Length(ft):0.0 0.0
Water Depth(ft): 0.06
Rustline Height(ft):1.4
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Embedded Depth(ft): 0.0
Outfall Height: 0.12
Outfall Type: Free Fall In To Pool
Constriction Ratio: 1.52
Culvert Gradient: 2.27%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:Silt/ClayOrganic
Subdominant:OrganicSilt/Clay
Stream Slope(deg.):
Stream Flow Stage:Low
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 42.0 2.60
Downstream ordinary high water 69.0 4.20
Downstream ordinary high water 130.0 4.80

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Grade Ctrl (Thalweg) (Top of small riffle) 0.00 87.66
D/S Water Surface Elev 0.00 88.01
D/S Tailcrest or 1st Thalweg (Tail water control. On wooden debris.) 12.00 87.87
D/S Water Surface Elev 12.00 88.07
Outlet Pool Water Elev (Water surface elevation at max pool) 34.00 88.07
Max Pool Depth (Max pool depth) 34.00 86.60
Outlet Culvert Top 2 41.00 91.92
Outlet Culvert Top 1 41.00 92.30
Outlet Invert 2 41.00 88.12
D/S Water Surface Elev (Water surface at pipe 2 outlet invert) 2 41.00 88.18
Outlet Invert (On pipe) 1 41.00 88.37
D/S Water Surface Elev (Water surface at Pipe 1 outlet invert) 1 41.00 88.41
Outlet Pool Water Elev (Pool surface elevation directly outside of Pipe 1 outlet) 1 41.00 88.03
Outlet Pool Water Elev (Pool surface elevation directly outside of pipe 2 outlet) 2 41.00 88.06
Road Elev (Middle of railroad tracks) 65.00 99.38
Inlet Culvert Top 1 89.00 93.05
U/S Water Surface Elev 1 89.00 89.37
U/S Grade Ctrl (Thalweg) (Thalweg emmediately upstream of pipe 1) 1 89.00 89.04
Inlet Culvert Invert 1 89.00 89.19
U/S Water Surface Elev (Water surface at pipe 1 inlet invert) 1 89.00 89.30
U/S Water Surface Elev (Water surface at pipe 2 inlet invert) 2 89.80 89.32
U/S Water Surface Elev (Inlet pool water surface) 2 89.80 89.34
Inlet Culvert Invert 2 89.80 89.23
Inlet Culvert Top 2 89.80 93.00
U/S Grade Ctrl (Thalweg) (Substrate upsream of pipe 2 in inlet pool) 2 89.80 88.90

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