Fish Passage Site 20501206

Coordinates (dec. deg.): 61.73625°, -149.23341°
Legal Description: S019N001E14
Region: South Central
Road Name: Palmer Fishhook Road

Datum: WGS84
Quad Name / ITM: Anchorage C-6
AWC Stream #:
Stream Name: Little 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 MSB09-PFR01

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

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Constriction ratio red
  2. Culvert gradient red
  3. Outfall height red

Comments: None

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 50.7
Inlet Type: Flared Inlet
Outlet Type: Flared Inlet
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 3
Approach Angle: 30.0
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):1.9 1.9
Height(ft):2.0 2.0
Apron Length(ft):3.2 3.2
Water Depth(ft): 0.05
Rustline Height(ft):0.2
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 1.46
Outfall Type: Cascade Over Rip-Rap
Constriction Ratio: 0.48
Culvert Gradient: 1.87%
Max Slope: 3.13
Max Slope Length:
 

Comments: Outfall hieght recalculated from invert out to end of cascade.ME.
  Culvert Observations:
  1. Constriction ratio red
  2. Culvert gradient red
  3. Outfall height red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:CobbleCobble
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 28.0 3.50
Upstream ordinary high water 90.0 4.50
Upstream ordinary high water 116.0 4.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Grade Ctrl (Thalweg) (TC of pool below 1st drop d/s) 1 0.00 10.0 97.32
D/S Water Surface Elev (WS @ GP) 1 0.00 10.0 97.43
D/S Grade Ctrl (Thalweg) (top of 1st drop) 1 4.00 6.0 98.39
D/S Water Surface Elev (WS @ GP) 1 4.00 6.0 98.46
D/S Tailcrest or 1st Thalweg (cobble) 1 6.50 3.5 98.68
D/S Water Surface Elev 1 6.80 3.2 98.73
D/S Thalweg (end of outlet apron) 1 6.80 3.2 98.68
Outlet Invert 1 10.00 0.0 98.78
Outlet Pool Water Elev 1 10.00 98.83
Road Elev 1 35.00 103.50
U/S Headwater (at invert) 1 60.70 99.85
Inlet Culvert Invert 1 60.70 0.0 99.73
U/S Thalweg (end of apron (inlet)) 1 63.90 3.2 99.80
U/S Grade Ctrl (Thalweg) (TC of pool u/s) 1 64.20 3.5 100.33
U/S Water Surface Elev (WS @ GP) 1 64.20 3.5 100.42

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.

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