Fish Passage Site 40601678

Coordinates (dec. deg.): 67.79185°, -149.80576°
Legal Description: F034N010W09
Region: Interior
Road Name: Dalton Highway

Datum: NAD83
Quad Name / ITM: Chandalar D-6
AWC Stream #:
Stream Name: Dietrich River tributary

Elevation:

Site Comments: None

Survey Date: Aug 22, 2010

Survey EDS10-DAL18

Observers: Gillian O'Doherty, Ben Histand

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert gradient red
  2. Outfall height red

Comments: Very steep. Grayling stream. Small outfall and small cascades downstream.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 101.2
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle: 5.0
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):7.6 7.8
Height(ft):7.9 8.0
Apron Length(ft):
Water Depth(ft): 0.25
Rustline Height(ft):1.1
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.67
Outfall Type: Free Fall In To Pool
Constriction Ratio:
Culvert Gradient: 8.90%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient red
  2. Outfall height red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:CobbleCobble
Stream Slope(deg.):
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 103.77
D/S Tailcrest or 1st Thalweg 0.00 82.37
D/S Water Surface Elev 0.00 82.73
Max Pool Depth (reading is approximate - over the top of the rod) 3.50 80.00
Outlet Pool Water Elev 8.00 82.72
Outlet Invert (on metal) 8.00 83.14
Outlet Culvert Top 8.00 91.24
Inlet Culvert Invert (on metal) 109.20 92.15
U/S Water Surface Elev 109.20 92.50
U/S Headwater 109.20 92.80
Inlet Culvert Top 109.20 100.17

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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