Fish Passage Site 40601674

Coordinates (dec. deg.): 68.00555°, -149.73923°
Legal Description: U017S010E02
Region: Interior
Road Name: Dalton Highway

Datum: NAD83
Quad Name / ITM: Philip Smith Mts A-5
AWC Stream #:
Stream Name: Dietrich River tributary

Elevation:

Site Comments: None

Survey Date: Aug 21, 2010

Survey EDS10-DAL14

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. Compound gradient in pipe

Comments: Pipe in outwash stream; stream very steep and vast-flowing; inlet slightly damaged; streambank restoration d/s w/ boulder steps and willow plantings; substrate in lower 1/3 pipe bare metal in upper 2/3, with 1 large boulder

Culvert Measurements

ID: 1 Structure Type: Pipe-arch (Structural steel plate) Fish Passage Rating: Red
 
Length(ft): 95.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 2.0
Corrugation Width(in.): 6.0
Condition Rating(1-5): 4
Approach Angle: 24.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate:
InletOutlet
Width(ft):11.0 11.0
Height(ft):6.7 6.6
Apron Length(ft):
Water Depth(ft): 0.9
Rustline Height(ft):2.0
Substrate Depth(ft):0.0 0.5
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio:
Culvert Gradient: 5.14%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient red
  2. Compound gradient in pipe

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:Cobble
Subdominant:Sand
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 104.50
D/S Water Surface Elev (turbulent) 0.00 91.68
D/S Tailcrest or 1st Thalweg 0.00 90.82
Outlet Pool Water Elev ((TWS)) 7.00 91.85
D/S Water Surface Elev (very turbulent) 10.00 92.08
Outlet Invert 10.00 91.18
Outlet Culvert Top 10.00 98.03
Inlet Culvert Top 104.90 103.05
Inlet Culvert Invert 104.90 96.06
U/S Water Surface Elev (turbulent) 104.90 97.07
U/S Headwater 106.00 97.09

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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