Fish Passage Site 20501049

Coordinates (dec. deg.): 61.65078°, -149.58540°
Legal Description: S018N002W14
Region: South Central
Road Name: West Sunrise Road

Datum: NAD83
Quad Name / ITM: Anchorage C-7
AWC Stream #:
Stream Name: Little Susitna River tributary

Elevation:

Site Comments: Access through private land, call ahead.

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-SUN03

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: No

Step Pools: No
Construction Year: 2010


Site Observations:

  1. None of this type

Comments: Replacement of MSB04ML023

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 75.7
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.0
Condition Rating(1-5): 5
Approach Angle: 12.0
Sedimentation At Inlet: Yes
Inlet Substrate: Cobble
Outlet Substrate: Gravel
InletOutlet
Width(ft):5.95 6.2
Height(ft):3.9 3.4
Apron Length(ft):0.0 0.0
Water Depth(ft): 0.66
Rustline Height(ft):0.0
Substrate Depth(ft):2.3 3.0
Backwatered?: No
Baffles Present: No
Embedded?: Yes
Embedded Depth(ft): 3.0
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 1.32
Culvert Gradient: 3.40%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. None of this type

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:CobbleCobble
Stream Slope(deg.):4.4
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 30.0 7.00
Upstream ordinary high water 65.0 3.50
Upstream ordinary high water 100.0 3.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Thalweg (profile pt dwst of large woody debris cascade) 0.00 84.12
D/S Water Surface Elev 0.00 84.59
D/S Grade Ctrl (Thalweg) (grade pt at top of woody debris cascade) 8.00 85.64
D/S Water Surface Elev (water surface at top of cascade) 8.00 86.52
D/S Water Surface Elev 21.00 86.62
D/S Grade Ctrl (Thalweg) (grade pt at bottom of riffle) 21.00 86.19
Outlet Invert (invert on substrate) 49.00 86.39
Outlet Culvert Top 49.00 90.05
D/S Water Surface Elev 49.00 87.05
Road Elev 86.00 100.26
Inlet Culvert Top 124.70 92.62
Inlet Culvert Invert (invert on substrate) 124.70 88.79
U/S Water Surface Elev 124.70 89.06
U/S Thalweg (profile pt in continuous riffle) 133.70 89.55
U/S Water Surface Elev (water surface used for gradient) 133.70 89.59
U/S Water Surface Elev (continuous riffle) 144.70 89.95
U/S Water Surface Elev (water surface use for gradient) 233.70 93.96

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