Fish Passage Site 40501774

Coordinates (dec. deg.): 65.35223°, -146.16353°
Legal Description: F006N008E17
Region: Interior
Road Name: Steese Highway

Datum: WGS84
Quad Name / ITM: Circle B-5
AWC Stream #:
Stream Name: Idaho Creek

Elevation:

Site Comments: Just downstream of STS24

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 EDS10-STS25

Observers: Ben Histand, Justin Leon

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert sagging in middle
  2. Structural Problem
  3. Outfall height red
  4. Culvert gradient red
  5. Constriction ratio gray
  6. Compound gradient in pipe

Comments: The top of the pipe at the inlet is bent in. This pipe appears to be leaning left or sagging if you are looking downstream through it.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 184.5
Inlet Type: Mitered
Outlet Type: Projecting
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle: 29.0
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):9.7 9.0
Height(ft):9.6 10.5
Apron Length(ft):
Water Depth(ft): 0.23
Rustline Height(ft):1.4
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 2.74
Outfall Type: Free Fall on To Rip Rap
Constriction Ratio: 0.65
Culvert Gradient: 2.95%
Max Slope: 11.51
Max Slope Length: 7.3
  Culvert Observations:
  1. Culvert sagging in middle
  2. Structural Problem
  3. Outfall height red
  4. Culvert gradient red
  5. Constriction ratio gray
  6. Compound gradient in pipe

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 58.0 9.10
Upstream ordinary high water 128.0 18.30
Upstream ordinary high water 171.0 16.40

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev (estimated 35-40 feet of fill above pipe) 1.00
D/S Grade Ctrl (Thalweg) (Tailcrest of Pool Downstream) 0.00 87.20
D/S Water Surface Elev (Water Surface) 0.00 87.81
D/S Tailcrest or 1st Thalweg (Thalweg) 22.00 88.74
D/S Water Surface Elev (Water Surface - Turbulent) 22.00 89.10
D/S Thalweg (Bottom of Outlet Pool) 27.00 87.24
D/S Water Surface Elev (Tailwater Surface) 31.00 89.17
D/S Thalweg (Rip-rap Off End of Pipe) 38.00 90.43
Outlet Invert (Bottom of Pipe) 38.00 91.68
D/S Water Surface Elev (Water Surface) 38.00 91.91
U/S Thalweg (Thalweg - Bottom on inlet miter) 215.20 96.28
U/S Water Surface Elev (Water Surface) 215.20 96.61
Inlet Culvert Invert (Bottom of Pipe) 222.50 97.12
U/S Water Surface Elev (Water Surface) 222.50 97.64
U/S Headwater (Headwater Surface) 222.50 97.67
U/S Grade Ctrl (Thalweg) (Tailcrest of Nice Resting Pool Upstream) 262.50 98.46
U/S Water Surface Elev (Water Surface) 262.50 98.85

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): 1.25
Channel Type: Main Channel (>50% of water flow)
Comments: Nothing was caught.
 
Gear Type: Minnow Trap (B) Trap Duration(h): 1.25
Channel Type: Main Channel (>50% of water flow)
Comments: Nothing was caught.

Fish Observations

Species: no fish collected or observed Life History: Not Applicable
Total Fish Observed: 0 Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: Downstream Minnow Trap (0)  Upstream Minnow Trap (0)  

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