Fish Passage Site 20501425

Coordinates (dec. deg.): 61.94751°, -150.05571°
Legal Description: S022N004W32
Region: South Central
Road Name: PARKS Highway

Datum: NAD83
Quad Name / ITM: Tyonek D-1
AWC Stream #: 247-41-10200-2190
Stream Name: Caswell Creek

Elevation:

Site Comments: SUSITNA RIVER WATERSHED

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-PRK04

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: Yes

Step Pools: No
Construction Year:


Site Observations:

  1. Constriction ratio gray

Comments: **2017: A new trash rack has been added to the inlet. Photos submitted by Heather Hanson USFWS.** Upst and Dwst areas are gentle glide areas meandering through lowlands marsh with slough flow. Water surface at inlets and outlets are equal making the site Backwatered.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Structural steel plate) Fish Passage Rating: Green
 
Length(ft): 103.55
Inlet Type: Mitered
Outlet Type: Mitered
Corrugation Depth(in.): 2.0
Corrugation Width(in.): 6.0
Condition Rating(1-5): 3
Approach Angle: 0.0
Sedimentation At Inlet: No
Inlet Substrate: Boulder
Outlet Substrate: Gravel
InletOutlet
Width(ft):11.6 11.2
Height(ft):12.1 11.2
Apron Length(ft):0.0 0.0
Water Depth(ft): 3.01
Rustline Height(ft):5.6
Substrate Depth(ft):0.5 1.8
Backwatered?: Yes
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.51
Culvert Gradient: 0.45%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Constriction ratio gray

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:SandGravel
Subdominant:GravelCobble
Stream Slope(deg.):0.14
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 16.0 22.50
Downstream ordinary high water 66.0 24.50
Downstream ordinary high water 104.0 21.50

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Thalweg (Profile point. Glide in downstream slough.) 0.00 89.16
D/S Water Surface Elev (Used for Stream Grade) 0.00 92.73
D/S Water Surface Elev 142.00 93.00
D/S Thalweg (Profile point. Mid point of downstream glide.) 142.00 90.25
D/S Thalweg (Profile point. End of apron/miter.) 240.00 90.26
D/S Water Surface Elev (Used for stream grade) 240.00 93.07
D/S Water Surface Elev (Water surface at outlet invert.) 262.00 93.08
Outlet Culvert Top 262.00 101.33
Outlet Invert 262.00 90.07
Road Elev 312.00 108.35
Inlet Culvert Top 325.55 101.62
U/S Water Surface Elev (Water surface at inlet invert.) 325.55 93.07
Inlet Culvert Invert 325.55 89.23
U/S Thalweg (Profile point. Thalweg in upstream glide.) 375.55 90.94
U/S Water Surface Elev 375.55 93.15

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: Minnow Trap (A) Trap Duration(h): 1.33
Comments: No fish caught

Fish Observations

No fish observations occurred during this survey.

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