Fish Passage Site 20501157

Coordinates (dec. deg.): 61.63160°, -149.78001°
Legal Description: S018N003W23
Region: South Central
Road Name: West Armstrong Road

Datum: NAD83
Quad Name / ITM: Anchorage C-8
AWC Stream #:
Stream Name: Little Susitna River tributary

Elevation:

Site Comments: None

Survey Date: Jul 27, 2009

Survey MSB09-ARM01

Project Supervisor: Gillian O'Doherty, ADFG
Observers: Heidi Zimmer, Ben Histand

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. None of this type

Comments: Juvenile salmonids observed u/s and d/s.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 66.4
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.0
Condition Rating(1-5): 2
Approach Angle: 0.0
Sedimentation At Inlet: No
Inlet Substrate: Cobble
Outlet Substrate: Cobble
InletOutlet
Width(ft):9.9 9.6
Height(ft):6.4 8.2
Apron Length(ft):
Water Depth(ft): 2.39
Rustline Height(ft):1.6
Substrate Depth(ft):3.5 1.4
Backwatered?: No
Baffles Present: No
Embedded?: Yes
Embedded Depth(ft): 1.4
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 1.05
Culvert Gradient: 0.17%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. None of this type

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:Silt/ClayGravel
Subdominant:CobbleCobble
Stream Slope(deg.):0.16
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 40.0 9.50
Upstream ordinary high water 70.0 9.50
Upstream ordinary high water 120.0 8.50

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Grade Ctrl (Thalweg) (GP at bottom of riffle) 0.00 91.49
D/S Water Surface Elev 0.00 92.52
D/S Tailcrest or 1st Thalweg (tailwater control) 35.00 93.13
D/S Water Surface Elev 35.00 93.68
Max Pool Depth (max pool depth) 45.00 92.83
D/S Water Surface Elev 45.00 93.72
Outlet Invert (invert on substrate) 47.00 92.55
D/S Water Surface Elev (outlet water surface) 47.00 93.71
Outlet Culvert Top 47.00 99.89
Road Elev 80.00 103.20
Inlet Culvert Top 113.50 100.00
Inlet Culvert Invert (invert on substrate) 113.50 93.17
U/S Water Surface Elev (inlet water surface) 113.50 93.76
U/S Water Surface Elev 119.50 93.87
U/S Thalweg (profile pt) 119.50 93.22
U/S Water Surface Elev (water surface for gradient) 122.50 93.94
U/S Water Surface Elev (water surface for gradient) 213.50 94.09

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

Gear Type: Visual Observation, Ground (A)
Comments: Juvenile salmonids observed u/s and d/s.

Fish Observations

Species: juvenile Pacific salmon-unspecified Life History: Anadromous
Total Fish Observed: Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: Visual Observation, Ground ()  

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