Fish Passage Site 40501764

Coordinates (dec. deg.): 65.25784°, -146.77296°
Legal Description: F005N005E17
Region: Interior
Road Name: Unknown

Datum: WGS84
Quad Name / ITM: Circle B-6
AWC Stream #:
Stream Name: Perhaps Creek

Elevation:

Site Comments: Dirt drive off the highway. Same creek as STS14

Survey Date: Jul 21, 2010

Survey EDS10-STS15

Observers: Ben Histand, Justin Leon

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Compound gradient in pipe
  2. Culvert gradient red

Comments: No minnow traps were set out because the water is too shallow. This appears to be a fairly old culvert. There is a compound gradient in this pipe. The pipe is rusted through, but there is more rust on the first foot from the bottom up.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Structural steel plate) Fish Passage Rating: Red
 
Length(ft): 59.9
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.5
Condition Rating(1-5): 2
Approach Angle: 22.0
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: Cobble
InletOutlet
Width(ft):4.1 4.0
Height(ft):4.0 3.4
Apron Length(ft):
Water Depth(ft): 0.18
Rustline Height(ft):
Substrate Depth(ft):0.0 0.6
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 2.07
Culvert Gradient: 2.44%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Compound gradient in pipe
  2. Culvert gradient red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelSilt/Clay
Subdominant:CobbleCobble
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 67.0 1.60
Upstream ordinary high water 89.0 1.90
Upstream ordinary high water 113.0 2.30

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev (Road Surface) 99.40
D/S Thalweg (High Point on Riffle Downstream) 0.00 92.75
D/S Water Surface Elev (Water Surface) 0.00 93.09
D/S Grade Ctrl (Thalweg) (High Point on Cascade at the Outlet) 15.00 93.79
D/S Water Surface Elev (Water Surface) 15.00 94.01
Outlet Invert (Bottom of Pipe) 18.00 94.07
D/S Water Surface Elev (Cascade/Riffle Out of Pipe - No True Tailwater Surface) 18.00 94.25
Outlet Culvert Top (Top of Pipe) 18.00 97.39
Inlet Culvert Top (Top of Pipe) 78.00 99.44
U/S Water Surface Elev (Turbulent - No True Headwater Surface - Riffle Upstream) 78.00 95.84
Inlet Culvert Invert (Bottom of Pipe) 78.00 95.53
U/S Thalweg (Tailcrest) (Tailcrest of Small Pool Upstream) 82.00 95.76
U/S Grade Ctrl (Thalweg) (Water Surface) 82.00 96.18

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: None (A)
Comments: No Traps set water too low, no fish observed.

Fish Observations

No fish observations occurred during this survey.

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