Fish Passage Site 20501137

Coordinates (dec. deg.): 61.51365°, -150.06941°
Legal Description: S017N004W31
Region: South Central
Road Name: PAPOOSE TWINS ROAD

Datum: NAD83
Quad Name / ITM: Tyonek C-1
AWC Stream #:
Stream Name: Crooked Lake outlet

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-PTR02

Project Supervisor: Gillian O'Doherty, Alaska Department of Fish and Game — Anchorage, AK
Observers: Mark Eisenman, John Greuey

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: No

Step Pools: No
Construction Year: 2004


Site Observations:

  1. Beaver Activity

Comments: Pond about 300 feet upstream. Pipe is close to being embedded, although it just misses the 20% substrate at outlet, there is continous substrate throughout pipe. Downstream channel not well defined and overgrown with alder. Stream spreads out and braids downstream from culvert. Upstream channel looks to be an old beaver channel but there are remenats of a couple beaver dams

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 33.8
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.5
Condition Rating(1-5): 3
Approach Angle: 27.0
Sedimentation At Inlet: Yes
Inlet Substrate: Cobble
Outlet Substrate: Cobble
InletOutlet
Width(ft):4.0 4.1
Height(ft):2.95 3.4
Apron Length(ft):
Water Depth(ft): 0.62
Rustline Height(ft):0.45
Substrate Depth(ft):1.1 0.75
Backwatered?: No
Baffles Present: No
Embedded?: Maybe
Embedded Depth(ft): 0.75
Outfall Height:
Outfall Type: At Stream Grade
Constriction Ratio:
Culvert Gradient: 2.98%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Beaver Activity
  2. Culvert gradient red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:Silt/ClayGravel
Subdominant:OrganicSand
Stream Slope(deg.):3
Stream Flow Stage:Medium

No stream width data available.

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 97.84
D/S Thalweg 0.00 92.44
D/S Water Surface Elev 0.00 92.69
D/S Tailcrest or 1st Thalweg 19.50 92.94
D/S Water Surface Elev 19.50 93.09
D/S Water Surface Elev 26.00 93.09
Max Pool Depth 26.00 92.15
D/S Water Surface Elev 36.00 93.08
Outlet Invert 36.00 92.46
Outlet Culvert Top 36.00 92.46
Inlet Culvert Top 69.80 97.02
Inlet Culvert Invert 69.80 94.01
U/S Water Surface Elev 69.80 94.22
U/S Grade Ctrl (Thalweg) 75.80 94.24
U/S Water Surface Elev 75.80 94.44
U/S Grade Ctrl (Thalweg) 104.80 94.61
U/S Water Surface Elev 104.80 94.85
U/S Water Surface Elev 249.80 95.29

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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